Front-end circuit
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United States of America Patent
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May 22, 2018
Issued Date -
N/A
app pub date -
Jan 12, 2016
filing date -
Jul 16, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A front-end circuit includes a multiplexer, a circulator, reception ports, and variable filters. A port in the multiplexer is connected to an antenna. A port in the circulator is connected to a port in the multiplexer. The reception ports are connected to a port in the circulator with the variable filters interposed therebetween. The multiplexer outputs a communication signal having a frequency in a low band to the port and outputs a communication signal having a frequency in a middle band to a port. Each of the low band and the middle band includes a plurality of frequency bands. The middle band is a range of frequencies higher than those in the low band and does not overlap the low band.
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