| CPC H04B 1/0053 (2013.01) [H04L 27/02 (2013.01)] | 18 Claims |
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1. An antenna system comprising:
an antenna operable in a selected frequency band of a plurality of frequency bands;
an antenna circuit comprising a radio frequency (RF) communication path, No the antenna circuit comprising one or more configurable elements in the RF communication path; and
a transmission line coupled to the antenna circuit;
a control unit that is configured to modulate a control signal onto an RF signal to generate a transmit signal for communication over the transmission line to the antenna circuit; and
a direct current (DC) filter and an RE filter disposed between the antenna circuit and the control unit, the DC filter configured to pass an unregulated DC signal transmitted with the transmit signal, the RF filter configured to pass an RF signal transmitted with the transmit signal,
wherein the antenna circuit is configured to demodulate the control signal from the transmit signal communicated over the transmission line, the antenna circuit configured to adjust the one or more configurable elements in the RF communication path based at least in part on the control signal to configure the RF communication path to operate in the selected frequency band.
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