Patent ID: 8891596

Claim:
A high frequency front end module configured to, by using a common antenna configured for a plurality of types of communication signals, transmit a transmission signal of the plurality of communication signals and receive a reception signal of the plurality of communication signals, the high frequency front end module comprising: a circulator including an antenna side port to be connected to the common antenna, a reception signal side port configured to output the reception signal, and a transmission side port configured to accept input of the transmission signal, the circulator being configured to transmit the transmission signal from the transmission side port to the antenna side port and transmit the reception signal from the antenna side port to the reception side port; a transmission side filter connected to the transmission side port of the circulator; and a reception side filter connected to the reception side port of the circulator; wherein the circulator includes an adjustment circuit configured to adjust, in accordance with the communication signals, transmission characteristics from the transmission side port to the antenna side port, transmission characteristics from the antenna side port to the reception side port, and blocking characteristics from the transmission side port to the reception side port; and the transmission side filter and the reception side filter each include a variable filter, of which a pass band and an attenuation band are adjustable in accordance with frequency bands of the communication signals.