Diplexer, and high-frequency switch and antenna duplexer...

Details Diplexer, and high-frequency switch and antenna duplexer... Diplexer, and high-frequency switch and antenna duplexer...

2005-12-13

2005-12-13

Nguyen, Lee (Department: 2682)

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

C455S552100, C370S275000, C333S103000

Reexamination Certificate

active

06975841

ABSTRACT:
A diplexer capable of passing signals of a high frequency band without being attenuated over a wide frequency band, and a high-frequency switch using the diplexer are provided. The diplexer includes a low-pass filter82having a parallel resonant circuit formed by a first capacitor C1and a first inductor L1and a serial resonant circuit formed by a second capacitor C2and a second inductor L2.With this structure, two attenuation poles are provided in the low-pass filter82.Thus, a passband of a high-pass filter83can be widened.

REFERENCES:
patent: 6366564 (2002-04-01), Hiraka et al.
patent: 2001/0004353 (2001-06-01), Furutani et al.
patent: 1 003 291 (2000-05-01), None
patent: 1 083 672 (2001-03-01), None
patent: 1 152 543 (2001-11-01), None
patent: 2000-349581 (2000-12-01), None
patent: 2001-44885 (2001-02-01), None

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