Variable-frequency resonator circuit, variable-frequency...

Details Variable-frequency resonator circuit, variable-frequency... Variable-frequency resonator circuit, variable-frequency...

2005-11-08

2005-11-08

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S103000, C333S134000

Reexamination Certificate

active

06963258

ABSTRACT:
A shared-antenna device having a transmission circuit electrically connected between a transmission terminal and an antenna terminal, and a reception circuit electrically connected between a reception terminal and the antenna terminal. The transmission circuit is a variable-frequency band-stop filter circuit and the reception circuit is a variable-frequency bandpass filter circuit. Control-voltage supplying resistors are connected to the PIN diodes such that the DC voltages for individually controlling the PIN diodes are applied to the PIN diodes via only the resistors.

REFERENCES:
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patent: 6590475 (2003-07-01), Yamada et al.
patent: 7-321509 (1995-12-01), None
patent: 11-312954 (1999-11-01), None
patent: 2000349580 (2000-12-01), None
Japanese Office Action issued Jun. 15, 2004 (w/ English translation of relevant portions).

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