Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Reexamination Certificate
2006-12-05
2006-12-05
Anderson, Matthew D. (Department: 2682)
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
C455S080000, C455S082000, C455S083000, C455S121000, C455S193200, C455S280000, C455S281000, C333S103000, C333S104000
Reexamination Certificate
active
07146137
ABSTRACT:
To provide a high frequency switch capable of dealing with multiple frequency bands without having plurality of switch circuits. A first diode that conducts due to a bias current when a first switch is closed is interposed between first signal terminal and a second signal terminal. A strip line with the electrical length L1is connected to the cathode of the first diode, the other end being grounded. At a position with a distance L2from one end of the strip line, a capacitor and a second switch are connected to be equivalently grounded when the second switch is closed. The strip line resonates with the electrical length L1when the second switch is opened, and resonates with the electrical length L2when the second switch is closed.
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Microfilm of the specification and drawings annexed to the request of Japanese Utility Model Application No. 62239-1983, Nov. 12, 1984.
Anderson Matthew D.
Matsushita Electric - Industrial Co., Ltd.
Pearne & Gordon LLP
Tran Tuan
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