Patent ID: 8223080

Claim:
A transmission and reception module comprising: an antenna that transmits a transmission wave or receives a reception wave; a transmission circuit that is connected to the antenna via a circulator and supplies the transmission wave to the antenna; a wave detection circuit that is connected to the antenna via the circulator and branches the reception wave received by the antenna to generate a control signal based on one branched reception wave; a high-frequency switch that is connected to the wave detection circuit and suppresses a power of another branched reception wave when the control signal is input; a small-signal high-frequency diode limiter circuit that is connected to the high-frequency switch and further suppresses the power of the another branched reception wave output from the high-frequency switch; and a first power amplifier that is connected to the small-signal high-frequency diode limiter circuit and amplifies the power of the another branched reception wave suppressed by the small-signal high-frequency diode limiter circuit.