Patent ID: 6934562
Filing Date: 2005-08-23
Classification: H01Q,H04B

Abstract:
1. A system for coupling a base station transmitter and a base station receiver to an antenna for a commercial mobile radio service (CMRS) system, comprising: an antenna for radiating transmit signals to and receiving receive signals from mobile radio stations of a CMRS system; a plurality of receive branch networks, coupled to the antenna via a receive path and to the base receiver, each operative to select a frequency range of the receive signals for reception by the base station receiver and to pass the receive signals for processing by the remaining receive branch networks located in a downstream portion of the receive path; a plurality of transmit branch networks, coupled to the antenna via a transmit path and to the base transmitter; each operative to select a frequency portion of the transmit signals transmitted by the base transmitter for forwarding to the antenna and to accept all transmit signals forwarded by the remaining transmit branch networks in a downstream portion of the transmit path for forwarding to the antenna; a bandpass filter, coupled between the antenna and the receive path, for passing receive signals within a predetermined frequency range from the antenna circulator to the receive path while preventing the passage of transmit signals from the circulator to the receiver path; and an isolator, coupled between the antenna and the transmit path, for passing transmit signals to the antenna circulator from the transmit path while preventing the passage of receive signals from the antenna to the transmit path; wherein each receive branch network includes a receive filter passing a block of frequencies to a base receiver, the block of frequencies corresponding to hopping channels inside a passband of said receive filter; said hopping channels used to change a frequency of communication between a mobile station and said base station receiver.