FRONT-END CIRCUIT

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 f...

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Bibliographic Details
Main Authors OBIYA HIDENORI, HAYAFUJI HISAO, MIZOGUCHI SHINYA
Format Patent
LanguageEnglish
Published 05.05.2016
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary: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.
Bibliography:Application Number: US201614993463