Patent ID: 7894779

Claim:
An apparatus for transmitting and receiving multiple radio frequencies simultaneously over a single antenna, the apparatus comprising: a transmitter signal combining apparatus configured to communicatively couple with a plurality of transmitters, wherein the transmitter signal combining apparatus is configured to output a transmission signal based on any signals received from the plurality of transmitters; at least one transmit/receive signal duplexer coupled to the transmitter signal combining apparatus and configured to provide the transmission signal to an antenna, wherein the antenna is also configured to sense an incoming radio frequency (RF) signal; a front end of a plurality of receivers coupled to the at least one transmit/receive signal duplexer; a signal suppressor configured to monitor the transmission signal and cancel at least a portion of a transmission signal component that has coupled to the incoming RF signal based on monitoring the transmission signal, wherein the signal suppressor cancels the at least a portion of a transmission signal component prior to an amplifier in the front end of the plurality of receivers; wherein the at least one transmit/receive signal duplexer is further configured to provide the incoming RF signal to the signal suppressor, and limit a direct coupling of the transmission signal into the signal suppressor; a tunable notch filter configured to have the incoming RF signal coupled therethrough after the incoming RF signal passes through the at least one transmit/receive signal duplexer, the tunable notch filter configured to reject a frequency of one of the plurality of transmitters that is currently transmitting, wherein the tunable notch filter is coupled to the incoming RF signal prior to the amplifier in the front end of the plurality of receivers; and a plurality of notch filters, each of the plurality of notch filters coupled to an output of one of the plurality of transmitters and configured to filter out a frequency of one of the plurality of receivers.