CA2093838C - Mobile data terminal with external antenna - Google Patents
Mobile data terminal with external antennaInfo
- Publication number
- CA2093838C CA2093838C CA002093838A CA2093838A CA2093838C CA 2093838 C CA2093838 C CA 2093838C CA 002093838 A CA002093838 A CA 002093838A CA 2093838 A CA2093838 A CA 2093838A CA 2093838 C CA2093838 C CA 2093838C
- Authority
- CA
- Canada
- Prior art keywords
- tubular member
- elongate tubular
- radio frequency
- flexible insulative
- generally rectangular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
Abstract
A mobile data terminal external antenna is disclosed for use with a battery powered data processing terminal which includes a radio frequency communication device, such as a cellular telephone transceiver.
Multiple antenna elements are mounted within a D-shaped flexible tubular member having a very low dielectric constant which is then affixed to the external surface of the data processing terminal, utilizing an adhesive on the flat surface thereof. The flexible tubular member is preferably mounted along at least two edges of the data processing terminal display module such that spatial or polarization diversity for the multiple antenna elements may be provided. A coaxial connector is utilized to couple the multiple antenna elements to a radio frequency communication device within the data processing terminal. In this matter, an external antenna may be added to a battery powered data processing terminal in a manner which will protect the antenna without interfering with radio frequency transmission or reception while simultaneously providing additional protection for the data processing terminal.
Multiple antenna elements are mounted within a D-shaped flexible tubular member having a very low dielectric constant which is then affixed to the external surface of the data processing terminal, utilizing an adhesive on the flat surface thereof. The flexible tubular member is preferably mounted along at least two edges of the data processing terminal display module such that spatial or polarization diversity for the multiple antenna elements may be provided. A coaxial connector is utilized to couple the multiple antenna elements to a radio frequency communication device within the data processing terminal. In this matter, an external antenna may be added to a battery powered data processing terminal in a manner which will protect the antenna without interfering with radio frequency transmission or reception while simultaneously providing additional protection for the data processing terminal.
Description
BACKGROUND OF THE INVENTION
3 1. TechnicalField:
4 The present invention relates in general to improvements in mobile data terminals and in particular to improvements in an external radio 6 frequency antenna for utilization with a mobile data terrninal. Still more7 particularly, the present invention relates to a flexible external radio 8 frequency antenna which may be rapidly and efficiently affixed to a mobileg data terminal.
3 1. TechnicalField:
4 The present invention relates in general to improvements in mobile data terminals and in particular to improvements in an external radio 6 frequency antenna for utilization with a mobile data terrninal. Still more7 particularly, the present invention relates to a flexible external radio 8 frequency antenna which may be rapidly and efficiently affixed to a mobileg data terminal.
2. Description of the Related Art:
2 Distributed data processing systems are increasingly cornmon 13 in the modern electronic work place. Such distributed data processing 4 systems may include thousands of computers or workstations including main frame computers, so-called "personal" computers, and modern state-of-the-16 art portable or "laptop" computers. In modern distributed data processing 17 systems many such computers may be linked together utilizing various 8 topologies and different types of networks including Advanced-Peer-To-Peer-19 Networks (Al?PN), Local Area Networks (LAN) or various other types of networks. While in the past computer networks are generally coupled 21 together utilizing existing telephone land line systems, or specialized wiring, 22 modern distributed data processing systems often utilize more sophisticated 23 means of communication.
For example, the increasing efflciency and decreasing cost of 26 cellular communication equipment has resulted in the utilization of that 27 technology to couple together multiple computers without the necessity of 28 access to a telephone line outlet. This particular technology is particularly 29 effective in combination with small, portable battery powered laptop or 3 o notebook computer in which the necessary modem and cellular 31 communication circuitry are miniaturized and provided in an integral fashion 32 with the computer itself. Often in such a computer, it is possible to remove 33 the fixed disk drive and replace that subassembly ~vith a combination modem and cellular communications device such that the data processing terminal 2 may be coupled to a large network utilizing cellular communications 3 technology. Thus, an operator utilizing such a computer may initiate4 communications and transfer data between his or her computer and a s distributed data processing system without the necessity of access to either 6 telephone lines or power lines.
8 The increasing utilization of such devices and the after market g refitting of existing laptop or notebook type computers with such o communications modules result in a problem in the efficiency of the radio frequency cornmunication. That is, devices which are initially designed for uti]ization with cellular communication circuitry are constructed with internal antenna elements which are optimized for cellular communications; however, 4 the after market rerltting of a laptop or notebook computer with a combination modem and cellular communication device often causes a problem, since such devices were not designed initially for cellular 17 cornmunication network linking.
19 The antenna devices typically utilized for cellular 2 o communication generally compose multiple antenna elements, each including 21 a radiating element which is equal in length to some fraction of the2 2 wavelength generally utilized by the cellular communication device. Further, 2 3 in order to enhance the efficiency of communication, these multiple antenna 24 elements must include elements which are separated by a minimum distance and preferably must be oriented normal to each other in space, in order to 2 6 provide the necessary separation and spatial diversity.
2 8 Thus, upon reference to the foregoing it should be apparent to 29 those skilled in the art that a need exists for an external antenna which may 3 o be rapidly and ef~lciently affixed to a portable data proces~in~ terminal in a 31 manner which provides optimum radio frequency communication.
209~8~8 SUMMARY OF THE lNVENTION
2 It is therefore one object of the present invention to provide an 3 improved mobile data terminal.
s It is another object of the present invention to provide an 6 improved external radio frequency anterma for utilization with a mobile data7 terminal.
g It is yet another object of the present invention to provide a 0 flexible external radio frequency antenna which may be rapidly and efficiently aff~lxed to a mobile data terminal.
3 The foregoing objects are achieved as is now described. The 4 mobile data terrninal with external antenna of the present invention may be implemented utilizing any battery powered data processing terminal v~hich 6 includes a radio frequency cornmunication device, such as a cellular 7 telephone transceiver. Multiple antenna elements are mounted within a D-shaped flexible tubular member having a very low dielectric constant which is 19 then af~lxed to the external surface of the data processing terminal, utilizing an adhesive on the flat surface thereof. The flexible tubular memb<er is 2 1 preferably mounted along at least two edges of the data procescing terminal 22 display module such that spatial or polarization diversity for the multiple 2 3 antenna elements may be provided. A coaxial connector is utilized to couple 24 the multiple antenna elements to a radio frequency comrnunication device within the data processing terminal. In this matter, an external anterma may 26 be added to a battery powered data processing terminal in a manner which 27 will protect the antenna without interfering with radio frequency tr~nsmicsion 28 or reception while simultaneously providing additional protection for the 2 9 data processing terrninal.
BRIEF DESCRIPIION OF THE DR~WING
3 The novel features believed characteristic of the invention are 4 set forth in the appended claims. The invention itself however, as well as apreferred mode of use, further objects and advantages thereof, will best be 6 understood by reference to the following detailed description of an 7 illustrative embodiment when read in conjunction with the accompanying 8 drawings, wherein:
1 0 Figure 1 is a partially schematic pictorial representation of a 11 portable data processing terminal utilizing the external antenna of the 12 present invention;
14 Figure 2 is a block dfagram of the major subsysterns of the portable data processing terminal of F gure l;
7 F;gure 3 is a sectional end view of one external antenna 8 element of the external antenna of Figure l; and 2 o Fi ~ re 4 is a sectional side view of the external antenna 21 element of the external antenna of Figure 1.
-209~838 DETAILED DESCRIP~ION OF PREFERRED EMBODIMENT
3 With reference now to the figures and in particular with 4 reference to Figure 1, there is depicted a partially schematic pictorial representation of a distributed data processing system 10 which may include a 6 portable data processing terminal 12 which may utilize an external antenna in 7 accordance with the present invention. Upon reference to the foregoing 8 those skilled in the art will appreciate that while distributed data processing g system 10 is illustrated as including only two computers, typically such 0 distributed data processing systems include a large number of computers 11 distributed over a wide geographic area As illustrated, portable data 12 processing terminal 12 is one of the computers within distributed data 13 processing system 10. Portable data processing terminal 12 is preferably a14 batte~y powered laptop or notebook computer which includes a low power display system 16 which preferably provides a display screen 18 which may be implemented utilizing a liquid crystal display (LCD), a gas plasma display or any other suitable technology. Keyboard 14 is provided with portable data 8 processing term nal 12 and enables the computer user to access and modify 19 data stored within portable data processing terminal 12 in a manner well 2 o known in the art.
22 As those skilled in the art will appreciate it is increasingly 23 common for computers such as portable computer 12 to include therein a 2 4 miniature cellular telephone system (not shown) which is provided in conjunction with a modem. For example, it is possible to remove the fixed 2 6 disk drive module typically provided with portable computer 12 and 27 substitute therefore a module which includes a cellular transceiver and 28 associated modem device. Those skilled in the art will appreciate that a 29 modem is a device which may be utilized to convert digital data from a 3 o computer to an analog signal which may be transrnitted via a 31 telecommunications system. Additionally, such devices convert received 3 2 analog signals from the telecommunications line to digital data which may be 33 utilized by a computer. As is typical in such systerns, a cellular telephone 209~838 transmits a radio frequency signal via an external antenna 20 which is 2 coupled to a cellular transceiver (not shown) via coaxial cable 21 and which 3 may be implemented utilizing the antenna system disclosed herein. As 4 illustrated, external antenna 20 preferably includes multiple antenna 5 elements 30, depicted in phantom l;ne within external antenna 20.
7 As is typical in such systems, a cellular telephone 8 communications device transmits a radio frequency signal via an external g antenna 20 which may be received and relayed via multiple cellular system 0 antenna 22. Thus, digital data within portable data processing terminal 12may be converted into a series of analog signals and transrnitted, via a 2 cellular telephone system and multiple intervening repeaters to a telephone 3 system 24, in a manner well known to those shlled in the art.
Analog signals thus transmitted may be received by the 6 telephone system and transmitted, via an ordinary telephone land line 26 to a 7 computer 28 within distributed data processing system 10. While computer 8 28 is depicted as a personal computer, those skilled in the art will appreciate 19 that computer 28 may be implemented utilizing a workstation, terminal or 2 o main frame computer, as desired. Typically, computer 28 will also include a 21 modem device perrnitting data from portable data proces~ing terminal 12 to22 be transmitted to and received by computer 28 and computer 28 may be 23 linked to portable data processing terminal 12 utilizing cellular technology, 24 rather than telephone land lines.
2 6 Referring now to Figure 2, there is depicted a block diagram of 27 the major subsystem components of portable data processing terminal 12 of 28 Figure 1. As illustrated, keyboard 14 and display 16 are coupled to a 29 processor 32. Processor 32 is coupled via bus 33 to modem device 34 which serves to convert digital data from processor 32 into analog data which may 31 be transmitted via cellular transceiver 36. As depicted, cellular transceiver 26iJ ' r 32 is coupled via coaxial cable 21 to external antenna 20, which includes a 3 3 plurality of antenna elements 30.
2 With reference now to Figure 3, there is depicted a sectional 3 end view of one antenna element 30 within the external antenna of Figure 1.
4 As illustrated, external antenna 20 preferably includes a flexible insulative elongate tubular member 38 which is preferably constructed of a foamed 6 plastic, such as polyurethane, or any other suitable flexible insulative material 7 having a dielectric constant of .001 or lower. As illustrated, the flat surface of 8 flexible insulative elongate tubular member 38 preferably includes a strip of g contact adhesive 42 which, in the depicted embodiment of the present invention, may be utilized to rapidly and efficiency mount external antenna 20 to the outer perimeter of display 16, as illustrated in Figure 1. Disposed 2 within flexible insulative elongate tubular member 38 is a ground plane 44, preferably constructed of copper or other highly conductive material, above 4 which is mounted antenna element 48, at a fixed distance from copper ground plane 44, utilizing radio frequency insulator 46. Thus, as those skilled 6 in the art will appreciate upon reference to the foregoing, by disposing 7 multiple antenna elements within flexible insulative elongate tubular member 8 38 and providing an adhesive backing strip 42, in the manner depicted, a 19 multi-element external radio frequency antenna may be simply and efficiently 2 o mounted to multiple sides of portable data processing terminal 12, providing 21 the necessary spatial diversity required to optimize cornmunications 2 2 efficiency utilizing a cellular communication system antenna 23 ~ ?
24 Refernng now to Figure 4, there is depicted a sectional side view of one anterma element(~ of external antenna 20 of Figure 1. As 26 illustrated, antenna element 30 is disposed within a flexible insulative 27 elongate tubular member 38, which is preferably D-shaped in the manner 2 8 depicted herein. Each antenna element portion 48A and 48B may comprise a 29 one/fourth wavelength antenna element which are coupled together, via 3 o coaxial connector 50, and mounted in fLxed spatial relationship above copper 31 ground plane 44 utilizing radio frequency insulators 46 in the manner 3 2 depicted.
Upon reference to the foregoing those skilled in the art will 2 appreciate that the Applicants herein have provided a novel multi-element 3 radio frequency external antenna which is mounted within a flexible tubular 4 member and which may be wrapped around multiple edges of a portable 5 battery powered data processing terrninal in a manner which efficiently 6 provides the necessary separation and spatial diversity for optimum radio 7 frequency communications. Those skilled in the radio frequency art will 8 appreciate that multiple antenna elements must be separated by g approximately ten inches in this frequency range or oAented at ninety lo degrees to each other in a manner easily provided utilizing the external 11 antenna of the present invention.
13 While the invention has been particularly shown and described 14 with reference to a preferred embodiment, it will be understood by those s skilled in the art that vaAous changes in form and detail may be made therein 6 without departing from the spirit and scope of the invention.
2 Distributed data processing systems are increasingly cornmon 13 in the modern electronic work place. Such distributed data processing 4 systems may include thousands of computers or workstations including main frame computers, so-called "personal" computers, and modern state-of-the-16 art portable or "laptop" computers. In modern distributed data processing 17 systems many such computers may be linked together utilizing various 8 topologies and different types of networks including Advanced-Peer-To-Peer-19 Networks (Al?PN), Local Area Networks (LAN) or various other types of networks. While in the past computer networks are generally coupled 21 together utilizing existing telephone land line systems, or specialized wiring, 22 modern distributed data processing systems often utilize more sophisticated 23 means of communication.
For example, the increasing efflciency and decreasing cost of 26 cellular communication equipment has resulted in the utilization of that 27 technology to couple together multiple computers without the necessity of 28 access to a telephone line outlet. This particular technology is particularly 29 effective in combination with small, portable battery powered laptop or 3 o notebook computer in which the necessary modem and cellular 31 communication circuitry are miniaturized and provided in an integral fashion 32 with the computer itself. Often in such a computer, it is possible to remove 33 the fixed disk drive and replace that subassembly ~vith a combination modem and cellular communications device such that the data processing terminal 2 may be coupled to a large network utilizing cellular communications 3 technology. Thus, an operator utilizing such a computer may initiate4 communications and transfer data between his or her computer and a s distributed data processing system without the necessity of access to either 6 telephone lines or power lines.
8 The increasing utilization of such devices and the after market g refitting of existing laptop or notebook type computers with such o communications modules result in a problem in the efficiency of the radio frequency cornmunication. That is, devices which are initially designed for uti]ization with cellular communication circuitry are constructed with internal antenna elements which are optimized for cellular communications; however, 4 the after market rerltting of a laptop or notebook computer with a combination modem and cellular communication device often causes a problem, since such devices were not designed initially for cellular 17 cornmunication network linking.
19 The antenna devices typically utilized for cellular 2 o communication generally compose multiple antenna elements, each including 21 a radiating element which is equal in length to some fraction of the2 2 wavelength generally utilized by the cellular communication device. Further, 2 3 in order to enhance the efficiency of communication, these multiple antenna 24 elements must include elements which are separated by a minimum distance and preferably must be oriented normal to each other in space, in order to 2 6 provide the necessary separation and spatial diversity.
2 8 Thus, upon reference to the foregoing it should be apparent to 29 those skilled in the art that a need exists for an external antenna which may 3 o be rapidly and ef~lciently affixed to a portable data proces~in~ terminal in a 31 manner which provides optimum radio frequency communication.
209~8~8 SUMMARY OF THE lNVENTION
2 It is therefore one object of the present invention to provide an 3 improved mobile data terminal.
s It is another object of the present invention to provide an 6 improved external radio frequency anterma for utilization with a mobile data7 terminal.
g It is yet another object of the present invention to provide a 0 flexible external radio frequency antenna which may be rapidly and efficiently aff~lxed to a mobile data terminal.
3 The foregoing objects are achieved as is now described. The 4 mobile data terrninal with external antenna of the present invention may be implemented utilizing any battery powered data processing terminal v~hich 6 includes a radio frequency cornmunication device, such as a cellular 7 telephone transceiver. Multiple antenna elements are mounted within a D-shaped flexible tubular member having a very low dielectric constant which is 19 then af~lxed to the external surface of the data processing terminal, utilizing an adhesive on the flat surface thereof. The flexible tubular memb<er is 2 1 preferably mounted along at least two edges of the data procescing terminal 22 display module such that spatial or polarization diversity for the multiple 2 3 antenna elements may be provided. A coaxial connector is utilized to couple 24 the multiple antenna elements to a radio frequency comrnunication device within the data processing terminal. In this matter, an external anterma may 26 be added to a battery powered data processing terminal in a manner which 27 will protect the antenna without interfering with radio frequency tr~nsmicsion 28 or reception while simultaneously providing additional protection for the 2 9 data processing terrninal.
BRIEF DESCRIPIION OF THE DR~WING
3 The novel features believed characteristic of the invention are 4 set forth in the appended claims. The invention itself however, as well as apreferred mode of use, further objects and advantages thereof, will best be 6 understood by reference to the following detailed description of an 7 illustrative embodiment when read in conjunction with the accompanying 8 drawings, wherein:
1 0 Figure 1 is a partially schematic pictorial representation of a 11 portable data processing terminal utilizing the external antenna of the 12 present invention;
14 Figure 2 is a block dfagram of the major subsysterns of the portable data processing terminal of F gure l;
7 F;gure 3 is a sectional end view of one external antenna 8 element of the external antenna of Figure l; and 2 o Fi ~ re 4 is a sectional side view of the external antenna 21 element of the external antenna of Figure 1.
-209~838 DETAILED DESCRIP~ION OF PREFERRED EMBODIMENT
3 With reference now to the figures and in particular with 4 reference to Figure 1, there is depicted a partially schematic pictorial representation of a distributed data processing system 10 which may include a 6 portable data processing terminal 12 which may utilize an external antenna in 7 accordance with the present invention. Upon reference to the foregoing 8 those skilled in the art will appreciate that while distributed data processing g system 10 is illustrated as including only two computers, typically such 0 distributed data processing systems include a large number of computers 11 distributed over a wide geographic area As illustrated, portable data 12 processing terminal 12 is one of the computers within distributed data 13 processing system 10. Portable data processing terminal 12 is preferably a14 batte~y powered laptop or notebook computer which includes a low power display system 16 which preferably provides a display screen 18 which may be implemented utilizing a liquid crystal display (LCD), a gas plasma display or any other suitable technology. Keyboard 14 is provided with portable data 8 processing term nal 12 and enables the computer user to access and modify 19 data stored within portable data processing terminal 12 in a manner well 2 o known in the art.
22 As those skilled in the art will appreciate it is increasingly 23 common for computers such as portable computer 12 to include therein a 2 4 miniature cellular telephone system (not shown) which is provided in conjunction with a modem. For example, it is possible to remove the fixed 2 6 disk drive module typically provided with portable computer 12 and 27 substitute therefore a module which includes a cellular transceiver and 28 associated modem device. Those skilled in the art will appreciate that a 29 modem is a device which may be utilized to convert digital data from a 3 o computer to an analog signal which may be transrnitted via a 31 telecommunications system. Additionally, such devices convert received 3 2 analog signals from the telecommunications line to digital data which may be 33 utilized by a computer. As is typical in such systerns, a cellular telephone 209~838 transmits a radio frequency signal via an external antenna 20 which is 2 coupled to a cellular transceiver (not shown) via coaxial cable 21 and which 3 may be implemented utilizing the antenna system disclosed herein. As 4 illustrated, external antenna 20 preferably includes multiple antenna 5 elements 30, depicted in phantom l;ne within external antenna 20.
7 As is typical in such systems, a cellular telephone 8 communications device transmits a radio frequency signal via an external g antenna 20 which may be received and relayed via multiple cellular system 0 antenna 22. Thus, digital data within portable data processing terminal 12may be converted into a series of analog signals and transrnitted, via a 2 cellular telephone system and multiple intervening repeaters to a telephone 3 system 24, in a manner well known to those shlled in the art.
Analog signals thus transmitted may be received by the 6 telephone system and transmitted, via an ordinary telephone land line 26 to a 7 computer 28 within distributed data processing system 10. While computer 8 28 is depicted as a personal computer, those skilled in the art will appreciate 19 that computer 28 may be implemented utilizing a workstation, terminal or 2 o main frame computer, as desired. Typically, computer 28 will also include a 21 modem device perrnitting data from portable data proces~ing terminal 12 to22 be transmitted to and received by computer 28 and computer 28 may be 23 linked to portable data processing terminal 12 utilizing cellular technology, 24 rather than telephone land lines.
2 6 Referring now to Figure 2, there is depicted a block diagram of 27 the major subsystem components of portable data processing terminal 12 of 28 Figure 1. As illustrated, keyboard 14 and display 16 are coupled to a 29 processor 32. Processor 32 is coupled via bus 33 to modem device 34 which serves to convert digital data from processor 32 into analog data which may 31 be transmitted via cellular transceiver 36. As depicted, cellular transceiver 26iJ ' r 32 is coupled via coaxial cable 21 to external antenna 20, which includes a 3 3 plurality of antenna elements 30.
2 With reference now to Figure 3, there is depicted a sectional 3 end view of one antenna element 30 within the external antenna of Figure 1.
4 As illustrated, external antenna 20 preferably includes a flexible insulative elongate tubular member 38 which is preferably constructed of a foamed 6 plastic, such as polyurethane, or any other suitable flexible insulative material 7 having a dielectric constant of .001 or lower. As illustrated, the flat surface of 8 flexible insulative elongate tubular member 38 preferably includes a strip of g contact adhesive 42 which, in the depicted embodiment of the present invention, may be utilized to rapidly and efficiency mount external antenna 20 to the outer perimeter of display 16, as illustrated in Figure 1. Disposed 2 within flexible insulative elongate tubular member 38 is a ground plane 44, preferably constructed of copper or other highly conductive material, above 4 which is mounted antenna element 48, at a fixed distance from copper ground plane 44, utilizing radio frequency insulator 46. Thus, as those skilled 6 in the art will appreciate upon reference to the foregoing, by disposing 7 multiple antenna elements within flexible insulative elongate tubular member 8 38 and providing an adhesive backing strip 42, in the manner depicted, a 19 multi-element external radio frequency antenna may be simply and efficiently 2 o mounted to multiple sides of portable data processing terminal 12, providing 21 the necessary spatial diversity required to optimize cornmunications 2 2 efficiency utilizing a cellular communication system antenna 23 ~ ?
24 Refernng now to Figure 4, there is depicted a sectional side view of one anterma element(~ of external antenna 20 of Figure 1. As 26 illustrated, antenna element 30 is disposed within a flexible insulative 27 elongate tubular member 38, which is preferably D-shaped in the manner 2 8 depicted herein. Each antenna element portion 48A and 48B may comprise a 29 one/fourth wavelength antenna element which are coupled together, via 3 o coaxial connector 50, and mounted in fLxed spatial relationship above copper 31 ground plane 44 utilizing radio frequency insulators 46 in the manner 3 2 depicted.
Upon reference to the foregoing those skilled in the art will 2 appreciate that the Applicants herein have provided a novel multi-element 3 radio frequency external antenna which is mounted within a flexible tubular 4 member and which may be wrapped around multiple edges of a portable 5 battery powered data processing terrninal in a manner which efficiently 6 provides the necessary separation and spatial diversity for optimum radio 7 frequency communications. Those skilled in the radio frequency art will 8 appreciate that multiple antenna elements must be separated by g approximately ten inches in this frequency range or oAented at ninety lo degrees to each other in a manner easily provided utilizing the external 11 antenna of the present invention.
13 While the invention has been particularly shown and described 14 with reference to a preferred embodiment, it will be understood by those s skilled in the art that vaAous changes in form and detail may be made therein 6 without departing from the spirit and scope of the invention.
Claims (13)
1. A multi-element radio frequency antenna adapted to be coupled to a radio frequency communication device within a generally rectangular mobile data terminal, said multi-element radio frequency antenna comprising:
a flexible insulative elongate tubular member;
means adapted to affix said flexible insulative elongate tubular member along at least two sides of an external surface of said generally rectangular mobile data terminal, a plurality of antenna elements disposed in a spaced-apart relationship within said flexible insulative elongate tubular member; and means for electrically coupling said plurality of antenna elements to said radiofrequency communication device within said generally rectangular mobile data terminal.
a flexible insulative elongate tubular member;
means adapted to affix said flexible insulative elongate tubular member along at least two sides of an external surface of said generally rectangular mobile data terminal, a plurality of antenna elements disposed in a spaced-apart relationship within said flexible insulative elongate tubular member; and means for electrically coupling said plurality of antenna elements to said radiofrequency communication device within said generally rectangular mobile data terminal.
2. The multi-element radio frequency antenna according to Claim 1, wherein said flexible insulative elongate tubular member comprises a flexible insulative tubular member having a D-shaped cross-section.
3. The multi-element radio frequency antenna according to Claim 2, wherein said means adapted to affix said flexible insulative elongate tubular member along at least two sides of an external surface of said generally rectangular mobile data terminal comprises an adhesive backing along at least a portion of a flat surface of said D-shaped cross-section.
4. The multi-element radio frequency antenna according to Claim 1, wherein said plurality of antenna elements comprises three antenna elements.
5. The multi-element radio frequency antenna according to claim 4, wherein said flexible insulative elongate tubular member comprises a flexible insulative elongate tubular member having a length greater than the greatest side of said generally rectangular mobile data terminal.
6. The multi-element radio frequency antenna according to claim 4 or 5, wherein each of said three antenna elements is disposed upon a separate side of said generally rectangular mobile data terminal when said flexible insulative elongate tubular member is affixed to said generally rectangular mobile data terminal.
7. The multi-element radio frequency antenna according to Claim 1 or 2, wherein said flexible insulative elongate tubular member is constructed of a flexible material having a dielectric constant less than .001, wherein radio frequency emissions from said multi-element radio frequency antenna will pass freely through said flexible insulative elongate tubular member.
8. A mobile data terminal comprising:
a generally rectangular case;
a radio frequency communication device within said generally rectangular case;
a flexible insulative elongate tubular member;
means for affixing said flexible insulative elongate tubular member along at least two sides of an external surface of said generally rectangular case;
a plurality of antenna elements disposed in a spaced-apart relationship within said flexible insulative elongate tubular member; and means for electrically coupling said plurality of antenna elements to said radiofrequency communication device within said generally rectangular case.
a generally rectangular case;
a radio frequency communication device within said generally rectangular case;
a flexible insulative elongate tubular member;
means for affixing said flexible insulative elongate tubular member along at least two sides of an external surface of said generally rectangular case;
a plurality of antenna elements disposed in a spaced-apart relationship within said flexible insulative elongate tubular member; and means for electrically coupling said plurality of antenna elements to said radiofrequency communication device within said generally rectangular case.
9. A mobile data terminal according to Claim 8, wherein said flexible insulative elongate tubular member comprises a flexible insulative tubular member having a D-shaped cross-section.
10. The mobile data terminal according to Claim 9, wherein said means for affixing said flexible insulative elongate tubular member along at least two sides of an external surface of said generally rectangular case comprises an adhesive backing along at least a portion of a flat surface of said D-shaped cross-section.
11. A mobile data terminal according to Claim 8, wherein said plurality of antenna elements disposed in spaced-apart relationship within said flexible insulative elongate tubular member comprises three antenna elements.
12 12. The mobile data terminal according to Claim 11, wherein said flexible insulative elongate tubular member comprises a flexible insulative elongate tubular member having a length greater than the greatest side of said generally rectangular case.
13. The mobile data terminal according to Claim 12, wherein each of said three antenna elements is disposed upon a separate side of said generally rectangular case when said flexible insulative elongate tubular member is affixed to said generally rectangular case.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US887,434 | 1992-05-21 | ||
| US07/887,434 US5373300A (en) | 1992-05-21 | 1992-05-21 | Mobile data terminal with external antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2093838A1 CA2093838A1 (en) | 1993-11-22 |
| CA2093838C true CA2093838C (en) | 1997-07-01 |
Family
ID=25391118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002093838A Expired - Fee Related CA2093838C (en) | 1992-05-21 | 1993-04-13 | Mobile data terminal with external antenna |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5373300A (en) |
| EP (1) | EP0571124B1 (en) |
| JP (1) | JP2522891B2 (en) |
| KR (1) | KR970007046B1 (en) |
| CN (1) | CN1052357C (en) |
| CA (1) | CA2093838C (en) |
| DE (1) | DE69319790T2 (en) |
Families Citing this family (74)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5905947A (en) * | 1993-03-04 | 1999-05-18 | Telefonaktiebolaget Lm Ericsson | Electronic audio system capable of communicating data signals over wireless networks |
| US5963872A (en) * | 1993-03-04 | 1999-10-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Electronic equipment audio system |
| US6016432A (en) * | 1993-03-04 | 2000-01-18 | Telefonaktiebolaget L/M Ericsson (Publ) | Electronic metering equipment system |
| CN1063601C (en) * | 1993-03-04 | 2001-03-21 | L.M.埃利克逊电话股份有限公司 | Modular radio communications system |
| US5890074A (en) * | 1993-03-04 | 1999-03-30 | Telefonaktiebolaget L M Ericsson | Modular unit headset |
| US6054955A (en) * | 1993-08-23 | 2000-04-25 | Apple Computer, Inc. | Folded monopole antenna for use with portable communications devices |
| WO1995008222A1 (en) * | 1993-09-15 | 1995-03-23 | Ericsson Ge Mobile Communications, Inc. | Power systems for plug-in modules |
| GB9322200D0 (en) * | 1993-10-28 | 1993-12-15 | Galtronics Uk Ltd | Antenna system |
| IL107461A (en) * | 1993-11-01 | 1997-04-15 | Tadiran Ltd | Personal location and message system and unit |
| US5590413A (en) * | 1994-01-14 | 1996-12-31 | Sun Microsystems, Inc. | Radio transceiver having shared modulation and demodulation mixer circuits |
| US5566069A (en) * | 1994-03-07 | 1996-10-15 | Monsanto Company | Computer network for collecting and analyzing agronomic data |
| GB2291271B (en) * | 1994-07-09 | 1998-05-13 | Northern Telecom Ltd | Communications antenna structure |
| GB2292482A (en) * | 1994-08-18 | 1996-02-21 | Plessey Semiconductors Ltd | Antenna arrangement |
| US5640689A (en) * | 1995-03-31 | 1997-06-17 | Compaq Computer Corp. | Communications apparatus with antenna switching based on antenna rotation |
| US6393584B1 (en) | 1995-04-26 | 2002-05-21 | International Business Machines Corporation | Method and system for efficiently saving the operating state of a data processing system |
| US5684672A (en) * | 1996-02-20 | 1997-11-04 | International Business Machines Corporation | Laptop computer with an integrated multi-mode antenna |
| US5966098A (en) * | 1996-09-18 | 1999-10-12 | Research In Motion Limited | Antenna system for an RF data communications device |
| JPH10126512A (en) * | 1996-10-16 | 1998-05-15 | Canon Inc | Communication equipment |
| US5867131A (en) * | 1996-11-19 | 1999-02-02 | International Business Machines Corporation | Antenna for a mobile computer |
| US6046707A (en) * | 1997-07-02 | 2000-04-04 | Kyocera America, Inc. | Ceramic multilayer helical antenna for portable radio or microwave communication apparatus |
| US6079367A (en) * | 1997-10-10 | 2000-06-27 | Dogwatch, Inc. | Animal training apparatus and method |
| US6349135B2 (en) * | 1998-09-01 | 2002-02-19 | Frazier/King Media Holding Co. | Method and system for a wireless digital message service |
| JP2000172376A (en) * | 1998-12-08 | 2000-06-23 | Toshiba Corp | Information processor |
| US6370376B1 (en) * | 1999-03-18 | 2002-04-09 | David J. Sheath | Computer cellular communication system |
| US6977808B2 (en) | 1999-05-14 | 2005-12-20 | Apple Computer, Inc. | Display housing for computing device |
| US6357887B1 (en) * | 1999-05-14 | 2002-03-19 | Apple Computers, Inc. | Housing for a computing device |
| EP1526604A1 (en) | 1999-09-20 | 2005-04-27 | Fractus, S.A. | Multilevel antenna |
| CN1196231C (en) | 1999-10-26 | 2005-04-06 | 弗拉克托斯股份有限公司 | Interlaced multiband antenna arrays |
| CN100373693C (en) * | 2000-01-19 | 2008-03-05 | 弗拉克托斯股份有限公司 | Space-filling miniature antennas |
| WO2001054221A1 (en) | 2000-01-19 | 2001-07-26 | Fractus, S.A. | Fractal and space-filling transmission lines, resonators, filters and passive network elements |
| US6754511B1 (en) | 2000-02-04 | 2004-06-22 | Harris Corporation | Linear signal separation using polarization diversity |
| US6329951B1 (en) * | 2000-04-05 | 2001-12-11 | Research In Motion Limited | Electrically connected multi-feed antenna system |
| JP2004501543A (en) | 2000-04-19 | 2004-01-15 | アドバンスド オートモーティブ アンテナズ ソシエダット デ レスポンサビリダット リミタダ | Improved automotive multilevel antenna |
| JP4817031B2 (en) * | 2000-05-09 | 2011-11-16 | ソニー株式会社 | Information processing device |
| US6531985B1 (en) * | 2000-08-14 | 2003-03-11 | 3Com Corporation | Integrated laptop antenna using two or more antennas |
| JP2002073210A (en) * | 2000-08-31 | 2002-03-12 | Toshiba Corp | Portable information equipment with built-in radio communication antenna |
| US7511675B2 (en) | 2000-10-26 | 2009-03-31 | Advanced Automotive Antennas, S.L. | Antenna system for a motor vehicle |
| US6862433B2 (en) * | 2001-02-06 | 2005-03-01 | Motorola, Inc. | Antenna system for a wireless information device |
| KR20030080217A (en) | 2001-02-07 | 2003-10-11 | 프레이투스, 에스.에이. | Miniature broadband ring-like microstrip patch antenna |
| US6664930B2 (en) * | 2001-04-12 | 2003-12-16 | Research In Motion Limited | Multiple-element antenna |
| BR0116985A (en) | 2001-04-16 | 2004-12-21 | Fractus Sa | Dual band and dual polarization antenna array |
| US7452098B2 (en) | 2001-06-15 | 2008-11-18 | Apple Inc. | Active enclosure for computing device |
| US7766517B2 (en) | 2001-06-15 | 2010-08-03 | Apple Inc. | Active enclosure for computing device |
| DE60215391T2 (en) | 2001-06-15 | 2007-10-25 | Apple Computer, Inc., Cupertino | ACTIVE COMPUTER HOUSING |
| GB2377587B (en) * | 2001-07-11 | 2005-03-30 | Vodafone Plc | Interconnection of mobile telecommunications terminals |
| US9755314B2 (en) | 2001-10-16 | 2017-09-05 | Fractus S.A. | Loaded antenna |
| EP1444751B1 (en) | 2001-10-16 | 2007-06-13 | Fractus, S.A. | Loaded antenna |
| DE60132638T2 (en) | 2001-10-16 | 2009-01-29 | Fractus, S.A. | MULTI FREQUENCY MICROBAND PATCH ANTENNA WITH PARASITIC COUPLED ELEMENTS |
| EP1942551A1 (en) | 2001-10-16 | 2008-07-09 | Fractus, S.A. | Multiband antenna |
| ES2190749B1 (en) | 2001-11-30 | 2004-06-16 | Fractus, S.A | "CHAFF" MULTINIVEL AND / OR "SPACE-FILLING" DISPERSORS, AGAINST RADAR. |
| US7050755B2 (en) * | 2002-01-24 | 2006-05-23 | Pctel Maryland, Inc. | Targeted mobile terminal communication blocker |
| AU2003218665A1 (en) * | 2002-02-22 | 2003-09-09 | Aalborg Universitet | Compact radio antenna device |
| US6879293B2 (en) * | 2002-02-25 | 2005-04-12 | Tdk Corporation | Antenna device and electric appliance using the same |
| AU2003243857A1 (en) * | 2002-06-21 | 2004-01-06 | Research In Motion Limited | Multiple-element antenna with parasitic coupler |
| US7057889B2 (en) * | 2002-12-05 | 2006-06-06 | Ge Medical Systems Information Technologies, Inc. | Apparatus and method for cable management |
| US6791500B2 (en) | 2002-12-12 | 2004-09-14 | Research In Motion Limited | Antenna with near-field radiation control |
| CA2414718C (en) | 2002-12-17 | 2005-11-22 | Research In Motion Limited | Dual mode antenna system for radio transceiver |
| US7167726B2 (en) | 2003-02-14 | 2007-01-23 | Intel Corporation | Multi-mode antenna system for a computing device and method of operation |
| JP3694014B2 (en) * | 2003-04-17 | 2005-09-14 | シャープ株式会社 | Wireless communication device |
| DE60316666T2 (en) * | 2003-05-14 | 2008-07-24 | Research In Motion Ltd., Waterloo | Multi-band antenna with stripline and slot structures |
| DE60319965T2 (en) * | 2003-06-12 | 2009-04-30 | Research In Motion Ltd., Waterloo | Multi-element antenna with parasitic antenna element |
| CA2435900C (en) * | 2003-07-24 | 2008-10-21 | Research In Motion Limited | Floating conductor pad for antenna performance stabilization and noise reduction |
| KR100479956B1 (en) * | 2003-08-25 | 2005-04-07 | 하정원 | caracter management system and service method thereof |
| US7369089B2 (en) * | 2004-05-13 | 2008-05-06 | Research In Motion Limited | Antenna with multiple-band patch and slot structures |
| US7429954B2 (en) * | 2005-09-16 | 2008-09-30 | Hewlett-Packard Development Company, L.P. | Display panel with pairs of antennas |
| US7459634B2 (en) * | 2005-10-17 | 2008-12-02 | Hewlett-Packard Development Company, L.P. | System and method for managing cables |
| US20070249503A1 (en) * | 2006-04-24 | 2007-10-25 | Honeywell International Inc. | Wireless sensor network with superconducting nodes |
| EP2025043A2 (en) | 2006-06-08 | 2009-02-18 | Fractus, S.A. | Distributed antenna system robust to human body loading effects |
| US8738103B2 (en) | 2006-07-18 | 2014-05-27 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
| US20080039160A1 (en) * | 2006-07-21 | 2008-02-14 | Homer Steven S | Wireless communications interface for a portable electronic device |
| TWI326938B (en) * | 2006-10-02 | 2010-07-01 | Compal Electronics Inc | Electronic device |
| JP4973311B2 (en) * | 2007-05-16 | 2012-07-11 | ソニー株式会社 | Electronics |
| US8427379B2 (en) * | 2010-08-19 | 2013-04-23 | Apple Inc. | Modular material antenna assembly |
| US9799943B2 (en) * | 2010-11-30 | 2017-10-24 | Intel Corporation | Cable antenna apparatus and system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2785399A (en) * | 1955-11-30 | 1957-03-12 | Edward F Harris | High frequency antenna |
| JPS5721123Y2 (en) * | 1977-04-25 | 1982-05-07 | ||
| US4584709A (en) * | 1983-07-06 | 1986-04-22 | Motorola, Inc. | Homotropic antenna system for portable radio |
| US4644366A (en) * | 1984-09-26 | 1987-02-17 | Amitec, Inc. | Miniature radio transceiver antenna |
| DE3712956A1 (en) * | 1987-04-16 | 1988-11-03 | Bernd Friemuth | Electrical conductor |
| JPH0834447B2 (en) * | 1987-06-03 | 1996-03-29 | 三菱電機株式会社 | Portable communication device |
| JPH01143506A (en) * | 1987-11-30 | 1989-06-06 | Sony Corp | Planar antenna |
| EP0444052A4 (en) * | 1989-09-21 | 1992-09-09 | Intelligence Technology Corporation | Integrated data transmission computer and system |
| CN2074060U (en) * | 1990-06-01 | 1991-03-27 | 国营中原无线电厂 | High-gain omnidirectional antenna for ultra-high frequency band |
| EP0494298B1 (en) * | 1990-07-25 | 1997-06-04 | Norand Corporation | Multi-level radio-frequency communication system |
| US5138328A (en) * | 1991-08-22 | 1992-08-11 | Motorola, Inc. | Integral diversity antenna for a laptop computer |
| JPH05257897A (en) * | 1992-03-16 | 1993-10-08 | Hitachi Ltd | Ratio antenna incorporated small-sized computer |
-
1992
- 1992-05-21 US US07/887,434 patent/US5373300A/en not_active Expired - Fee Related
-
1993
- 1993-04-13 CA CA002093838A patent/CA2093838C/en not_active Expired - Fee Related
- 1993-04-19 JP JP5091209A patent/JP2522891B2/en not_active Expired - Fee Related
- 1993-04-21 KR KR1019930006743A patent/KR970007046B1/en not_active IP Right Cessation
- 1993-05-11 EP EP93303649A patent/EP0571124B1/en not_active Expired - Lifetime
- 1993-05-11 DE DE69319790T patent/DE69319790T2/en not_active Expired - Fee Related
- 1993-05-18 CN CN93105782A patent/CN1052357C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| KR930024221A (en) | 1993-12-22 |
| CA2093838A1 (en) | 1993-11-22 |
| JPH0637695A (en) | 1994-02-10 |
| CN1052357C (en) | 2000-05-10 |
| DE69319790T2 (en) | 1999-03-25 |
| EP0571124B1 (en) | 1998-07-22 |
| EP0571124A1 (en) | 1993-11-24 |
| CN1079348A (en) | 1993-12-08 |
| DE69319790D1 (en) | 1998-08-27 |
| JP2522891B2 (en) | 1996-08-07 |
| KR970007046B1 (en) | 1997-05-02 |
| US5373300A (en) | 1994-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |