Patent ID: 7760691
Filing Date: 2010-07-20
Classification: H03H,H04B

Abstract:
1. A high-frequency circuit apparatus with supportability to a plurality of frequency bands including a band of TDMA method and a band of CDMA method, said apparatus comprising: a second high-frequency switch for switching an input send signal between a transmission path of a first communication system of the TDMA method and a transmission path of a seventh communication system of the CDMA method; a first low-pass filter for causing attenuation of an unnecessary signal from one send signal as switched by said second high-frequency switch; a first duplexer having a first port, a second port and a third port, for outputting to the second port a remaining send signal which is input from the first port and switched by said second high-frequency switch while applying thereto wave separation with a received signal different in frequency from the send signal and for outputting to the third port a received signal of said first communication system to be input from the second port and a received signal of said seventh communication system, which are in the same frequency band; a first high-frequency switch for switching a received signal as input from an antenna terminal to the second port of said first duplexer and for switching to said antenna terminal both said send signal which is wave-separated by said first duplexer and is output from said second port and a send signal as output from said first low-pass filter; and a diplexer for transmitting toward an antenna a send signal of one of said first communication system and a third communication system each being the TDMA method and said seventh communication system being the CDMA method and for performing, in a signal reception event, wave separation of a signal of a first frequency in the frequency band of said first communication system and said seventh communication system and a signal of a second frequency of said third communication system being in a frequency band higher than said first frequency, wherein said first high-frequency switch switches the signal of said first frequency as output from said diplexer to said first duplexer and for switching an output signal of said first low-pass filter to said diplexer; and wherein said diplexer further transmits to the antenna a send signal of one of said first communication system and a fourth communication system each of which is the TDMA method and a sixth communication system and said seventh communication system each of which is the CDMA method and for performing, in a signal reception event, wave separation of the signal of said second frequency including both said first frequency and frequency bands of said fourth communication system and said sixth communication system, and wherein said apparatus further comprises: a fourth high-frequency switch for switching between a signal transmission path of said fourth communication system and a signal transmission path of said sixth communication system, a second low-pass filter for attenuation of an unnecessary signal of a signal to be output from said fourth high-frequency switch, a third duplexer for performing wave separation of a send signal of said fifth communication system or said sixth communication system and a received signal different in frequency band from such the send signal and for causing signal reception paths of respective received signals of the fourth and sixth communication systems, which are in the same frequency band, to be the same as each other, and a third high-frequency switch for switching the signal of said second frequency as output from said diplexer to said third duplexer and for switching an output signal of said second low-pass filter to said diplexer.