A slot antenna for receiving and/or transmitting a RF signal at a desired one of a plurality of different frequencies. The slot antenna includes at least one conductive sheet having a slot defined therein, the slot being longer than it is wide and having at least one end which is open. A plurality of...http://www.google.com.tw/patents/US6864848?utm_source=gb-gplus-share專利 US6864848 - RF MEMs-tuned slot antenna and a method of making same
