Patent ID: 8103311

Claim:
An access point, comprising: a combined transmit antenna including a first transmit antenna and a second transmit antenna facing in opposite directions and coupled to a transmit antenna combiner; a transmitter; a multiplexer coupled to the transmitter and to the combined transmit antenna; a combined receive antenna including a first receive antenna and a second receive antenna facing in opposite directions and coupled to a receive antenna combiner, said combined receive antenna facing 180 degrees opposite said combined transmit combiner and modulated using a substantially identical code; a receiver; a de-multiplexer coupled to the receiver and to the combined receive antenna; and a control circuit that determines what signals are transmitted on what frequencies via the transmitter, the multiplexer, and the combined transmit antenna and what signals are received on what frequencies via the receiver, the de-multiplexer, and the combined receive antenna; wherein the first transmit antenna, the second transmit antenna, the first receive antenna, and the second receive antenna each includes a 5 GHz patch antenna and a 2.4 GHz patch antenna; wherein the combined transmit antenna is located parallel to a maximum power reception region of said receive antenna in a null coverage zone of the combined receive antenna and the combined receive antenna is located parallel to said maximum power transmission region of said transmission antenna in a null coverage zone of the combined transmit antenna; and wherein the combined transmit antenna and the combined receive antenna co-locate multiple channels or channels and radios at the access point.