Patent ID: 7206551
Filing Date: 2007-04-17
Classification: H01P

Abstract:
1. A high frequency switch module comprising: an antenna port connected to an antenna; a plurality of transmission signal ports for receiving transmission signals at each of a plurality of frequency bands; a plurality of reception signal ports for outputting reception signals at each of a plurality of frequency bands; a high frequency switch including a semiconductor switch element and selectively connecting one signal port among the transmission signal ports and the reception signal ports to the antenna port; a plurality of low-pass filters each provided between the high frequency switch and each of the transmission signal ports and allowing a transmission signal inputted to each of the transmission signal ports to pass therethrough and intercepting a harmonic resulting from the transmission signal; and a plurality of phase adjusting lines for connecting the high frequency switch to the respective low-pass filters, wherein each of the phase adjusting lines adjusts a phase difference between a progressive wave of a harmonic of at least one frequency resulting from the transmission signal and produced at the high frequency switch and a reflected wave resulting from reflection of the progressive wave from one of the low-pass filters such that, at a point of the high frequency switch, a composite wave made up of the progressive wave and the reflected wave has power lower by at least 10 dB as compared to a case where the phase difference between the progressive wave and the reflected wave is zero.