multi-band communication device a multi-band high-frequency circuit, using the same and multi-band high-frequency circuit component

摘要

A multi-band high-frequency circuit for wireless communication of the communication system of multiple communication frequencies are different, the high-frequency switch circuit comprising switching elements for switching the connection of the receiving side circuit and the transmission circuit and the multi-band multiple antennas, radio frequency are arranged between the diplexer circuit of a first is arranged between the transmission side circuit and switching circuit, demultiplexing the high frequency signal according to the frequency band of the communication system, a receiving side circuit and the high-frequency switch circuit, the communication and a demultiplexing second circuit demultiplexes the high frequency signal according to the frequency band of the system, diplexer circuit and the second diplexer circuit of the first high-frequency-side filter circuit and a low-frequency-side filter circuit each has, either using a band-pass filter circuit as a low-frequency-side filter circuit of the diplexer circuit, the second place a bandpass filter circuit between the receiving side circuit and the low-frequency-side filter circuit of the diplexer circuit of the second with, by providing a band-pass filter and a receive-side circuit of the low-frequency side from the diplexer of the second high-frequency switch circuit includes a fourth port to the first port of the first of the first is connected to the multi-band antenna, the second port is connected to the multi-band antenna of a second, a third port is connected to the diplexer circuit of the first, the fourth port is connected to the diplexer circuit of the second It is, as well as select a multi-band antenna by controlling the OFF state or ON state switching device performs wireless communication, the connection of the receiving side circuit or connection, and the transmission side circuit and a multi-band antenna selected multi-band high-frequency circuit for switching.