Antenna switching circuit and wireless communication system
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United States of America Patent
Stats
-
Oct 13, 1998
Grant Date -
N/A
app pub date -
May 22, 1996
filing date -
May 30, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An antenna switching circuit (55) is constructed by a circulator element (63) having three terminals, of which the first terminal (CTX) is connected to the transmitting circuit, the second terminal (CANT) is connected to a first antenna (4), and the third terminal (CRX) can be connected to the terminal resistance (64) through a first switch element (62); a second switch element (60) capable of connecting the third terminal of the circulator element to the receiving circuit; and a third switch element (61) capable of connecting a second antenna (22) to the receiving circuit, whereby, it is no longer necessary to use a duplexer circuit having large insertion loss, the whole construction can be miniaturized, and the insertion loss can be reduced.
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Cited Art Landscape
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