High-frequency switch
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United States of America Patent
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Apr 16, 2013
Grant Date -
Mar 10, 2011
app pub date -
Jun 2, 2009
filing date -
Jun 6, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Provided is a high-frequency switch formed by a first switch circuit connected in parallel to a first λ/4 signal transmission path for transmitting a transmission signal from a transmission terminal and a second switch circuit connected in parallel to a second λ/4 signal transmission path for transmitting a reception signal to a reception terminal. The high-frequency switch further includes a directivity coupler which has the first λ/4 signal transmission path as a constituent element and detects a reflected wave of the transmission signal. The directivity coupler includes: the first λ/4 signal transmission path; a λ/4 signal line arranged to oppose to the first λ/4 signal transmission path; a reflected wave output terminal connected to one end of the λ/4 signal line; and a terminal resistor connected to the other end of the λ/4 signal line.
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