Device for separating signal transmission and reception and communication system including same

摘要

A communication system includes an antenna. A signal transmission and reception unit for cellular CDMA communication and a signal transmission and reception unit for PCS COMA communication are coupled to the antenna.

主权项

1. A communication system, comprising:
a first antenna; a signal transmission and reception unit for cellular CDMA communication coupled to the first antenna; a signal transmission and reception unit for PCS CDMA communication coupled to the first antenna; a first device for separating signal transmission and reception coupled between the first antenna and the signal transmission and reception unit for cellular CDMA communication; a second device for separating signal transmission and reception coupled between the first antenna and the signal transmission and reception unit for PCS CDMA communication; a second antenna; a signal transmission and reception unit for cellular EVDO communication coupled to the second antenna; a signal transmission and reception unit for PCS EVDO communication coupled to the second antenna; a third device for separating signal transmission and reception coupled between the second antenna and the signal transmission and reception unit for cellular EVDO communication; a fourth device for separating signal transmission and reception coupled between the second antenna and the signal transmission and reception unit for PCS EVDO communication; a signal transmission and reception unit for LTE B13 communication coupled to the second antenna; and a fifth device for separating signal transmission and reception coupled between the second antenna and the signal transmission and reception unit for LTE B13 communication, wherein at least one of the first to fifth devices for separating signal transmission and reception comprises:
first, second, and third device ports;a circulator including a first circulator port, a second circulator port and a third circulator port, wherein an input to the first circulator port is output to the second circulator port and an input to the second circulator port is output to the third circulator port;a transmission filter coupled between the first circulator port and the first device port; anda reception filter coupled between the third circulator port and the third device port,wherein the second circulator port is coupled to the second device port.