| 摘要 |
<p>A slot antenna for receiving and/or transmitting a RF signal at a desired one of a plurality ofdifferent frequencies. The slot antenna includes at least one conductive sheet having a slotdefined therein, the slot being longer than it is wide and having at least one end which is open.A plurality of switch members are mounted along said slot close to the open end thereof, each of said plurlaity of switch members acting, when closed, to couple the at least one conductive sheet on one side of said slot to the at least one conductive sheet on a second side thereof. Afeed point is provided for adjacent said slot. The plurality of switch members are closable in a controlled manner to change a desired resonance frequency at which the slot antenna receivesand/or transmits the RF signal.</p> |
