High-frequency composite switch module
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYuki Satoh, Hiroshi Kushitani, Riho Sasaki, Narihiro Mita
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Abstract
A high-frequency hybrid switch module arranged applicable to at least two different communications systems includes two low pass filters (LPFs), two phase shifters, a field effect transistor (FET) switch including FETs, and two SAW filters. The FETs and the SAW filters are mounted on a layered assembly including the LPFs and an electrode pattern of the phase shifters. The module can have a small overall size, a low cost, and a small loss, while being protected from static electricity. The module requires small number of low-noise amplifiers at a signal receiving side.
Claims34
A high-frequency hybrid switch module comprising:
- an antenna port;
- a field effect transistor (FET) switch coupled to said antenna port and including an FET;
- a control port for controlling said FET switch;
- first and second transmitting ports;
- a first low pass filter (LPF) provided between said first transmitting port and said FET switch;
- a second LPF provided between said second transmitting port and said FET switch;
- first and second surface acoustic wave (SAW) filters having respective input ends coupled to said FET switch;
- first and second phase shifters connected in series with said first and second SAW filters, respectively;
- and
- a layered assembly having said FET switch and said first and second SAW filters mounted thereon, said layered assembly including
- a dielectric layer, and
- an electrode pattern provided on said dielectric layer for serving as at least a portion of said first and second LPFs and said first and second phase shifters.
Dependencies are inferred from the claim text.