Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Reexamination Certificate
2011-03-01
2011-03-01
Dao, Minh D (Department: 2618)
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
C455S082000, C455S013300, C455S078000, C343S876000, C257S192000
Reexamination Certificate
active
07899412
ABSTRACT:
A switching element is provided that realizes an stabilize a potential between the gates of the multi-gates without an increase in the insertion loss, and an antenna switch circuit and a radio frequency module each using the switch element. The switching element includes two ohmic electrodes39, 40formed on a semiconductor substrate, at least two gate electrodes41, 42disposed between the two ohmic electrodes, and a conductive region45disposed between the adjacent gate electrodes among the at least two gate electrodes, a field effective transistor being structured by the two ohmic electrodes, the at least two gate electrodes, and the conductive region. The conductive region has a wider portion that is wider in width than the conductive region interposed between the adjacent gate electrodes on one end thereof. The distance between the adjacent gate electrodes is narrower than the width of the wider portion. Resistors44, 46are connected in series between the two ohmic electrodes through the wider portion.
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Koya Shigeki
Nakajima Akishige
Ogawa Takashi
Osakabe Shinya
Shigeno Yasushi
A. Marquez, Esq. Juan Carlos
Dao Minh D
Renesas Electronics Corporation
Stites & Harbison PLLC
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