Patent ID: 8582478

Claim:
A frequency division (FD) multiplexing device comprising: a multiplexer comprising a band-pass filter and a band-stop filter, the multiplexer being configured to be communicatively coupled to an antenna, the band-pass filter being configured to allow signals at frequencies in a pass-band to pass un-attenuated and to attenuate signals at frequencies outside of the pass-band, the band-stop filter being configured to attenuate signals at frequencies in at least a portion of the pass-band and to allow frequencies outside of the pass-band to pass un-attenuated; first and second receive filters communicatively coupled to the multiplexer to receive a first receive signal in a first receive band and receive a second receive signal in a second receive band different than the first receive band, the first and second receive filters configured to attenuate signals at frequencies outside of the first and second receive bands, respectively; and first and second transmit filters communicatively coupled to the multiplexer and configured to filter a first transmit signal in a first transmit band to attenuate signals at frequencies outside of the first transmit band, and to filter a second transmit signal in a second transmit band different than the first transmit band to attenuate signals at frequencies outside of the second transmit band, and to couple the first and second filtered transmit signals to the multiplexer such that the first and second transmit signals will be transmitted via the antenna; wherein at least one of the first receive band and the first transmit band are located in the pass-band and intermingled between the second receive band and the second transmit band.