| 摘要 |
A front end module for removing harmonics characteristic generated in a transmission mode of high frequency is provided to reduce a harmonic component which can be generated when the front end module operates in a transmission mode. An antenna(11) transmits multi-band frequency signal. A diplexer(12) is connected to the antenna. A diplexer separates the frequency band signal transmitted and received from an antenna. Transmission-reception switches(13, 14) transmit signal separated by a diplexer to a reception end. A first low pass filter(15) is formed between a first transmission-reception switch and a first frequency wideband transmitting end. The first low pass filter attenuates the harmonic distortion generated from a power amp. A second low pass filter(16) is formed between the second transmission-reception switch and the secondary frequency band transmitting end. The third low pass filter is formed between diplexer and antenna. The third low pass filter can attenuate 'the harmonic distortion generated in the transmission-reception switch.
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