Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2005-11-29
2005-11-29
Corsaro, Nick (Department: 2682)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S078000, C455S082000, C455S083000, C455S552100
Reexamination Certificate
active
06970718
ABSTRACT:
A small-sized switch apparatus for switching between signal paths of at least first, second and third frequency bands is capable of handling high-powered high-frequency signals with a relatively low control voltage and is useful in a mobile terminal apparatus. A first signal terminal of a diplexer is connected to an antenna terminal, and a second signal terminal is connected to a high-frequency switch via a filter. A third signal terminal of the diplexer is connected to a high-frequency switch via a second filter. The high-frequency switch has PIN diodes as switching devices, and performs switching between a global system for mobile communications transmission signal and a global system for mobile communications reception signal. The high-frequency switch has three sets of serially connected multi-staged FETs as switching devices, and performs switching between wide-band code division multiple access transmission/reception signals, a digital cellular system transmission signal and a digital cellular system reception signal.
REFERENCES:
patent: 6788958 (2004-09-01), Furutani et al.
patent: 2002/0183016 (2002-12-01), Kemmochi et al.
patent: 2003/0189910 (2003-10-01), Yamada et al.
Corsaro Nick
Huang Wen
Maioli Jay H.
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