Patent ID: 8055219

Claim:
A method of transmitting signals at multiple frequencies from a transmitter, the method comprising: determining by a processor circuit an operational center frequency of a signal to transmit according to received user input, the operational center frequency being centered within a first band of frequencies, the first band of frequencies having a first bandwidth; tuning a single loop antenna to match the operational center frequency, the single loop antenna arranged and configured to operate across a second band of frequencies having a second bandwidth and wherein the first bandwidth is less than the second bandwidth, the tuning comprising: a synthesizer circuit receiving a signal from the processing circuit, in response to receiving the signal from the processing circuit, the synthesizer circuit generating a transmission signal and applying the transmission signal to the single loop antenna for transmission, and the processor circuit and the synthesizer circuit applying signals to control application of a voltage to a tuner, the application of the voltage to the tuner effecting matching of the operational center frequency by the single loop antenna; transmitting the signal to transmit from the single loop antenna according to the operational center frequency to provide a transmitted signal.