High-frequency switching module and its control method

Multiplex communications – Duplex – Frequency division

Reexamination Certificate

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Details

C455S082000, C455S083000

Reexamination Certificate

active

07545759

ABSTRACT:
A method for controlling a high-frequency switching module comprising a diplexer comprising first and second filter circuits F1,F2for dividing signals received by an antenna to a receiving signal of a first transmitting/receiving system and a receiving signal of second and third transmitting/receiving systems, a first switching circuit SW1disposed downstream of the first filter circuit F1for switching a transmitting circuit TX1and a receiving circuit RX1of the first transmitting/receiving system by voltage applied from a control circuit VC1,and a second switching circuit SW2disposed downstream of the second filter circuit F2for switching a transmitting circuit TX2of the second and third transmitting/receiving systems, a receiving circuit RX2of the second transmitting/receiving system and a receiving circuit RX3of the third transmitting/receiving system by voltage applied from control circuits VC2,VC3,the method comprising applying a positive voltage from the control circuit VC1to the first switch circuit SW1to connect the transmitting circuit TX1of the first transmitting/receiving system to the antenna, and applying a positive voltage from the control circuit VC3.

REFERENCES:
patent: 6606015 (2003-08-01), Uriu et al.
patent: 6768898 (2004-07-01), Furutani et al.
patent: 6975841 (2005-12-01), Uriu et al.
patent: 7057472 (2006-06-01), Fukamachi et al.
patent: 2002-198854 (2002-07-01), None
patent: 2004-007408 (2004-01-01), None
patent: WO 0055983 (2000-09-01), None

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