Multiplex communications – Duplex – Frequency division
Reexamination Certificate
2005-02-16
2009-06-09
Tran, Phuc H (Department: 2416)
Multiplex communications
Duplex
Frequency division
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.
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patent: 6975841 (2005-12-01), Uriu et al.
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patent: 2002-198854 (2002-07-01), None
patent: 2004-007408 (2004-01-01), None
patent: WO 0055983 (2000-09-01), None
Hitachi Metals Ltd.
Sughrue & Mion, PLLC
Tran Phuc H
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