Patent ID: 6128476
Filing Date: 2000-10-03
Classification: H04B,Y02D

Abstract:
A transmitting diversity circuit for a TDMA radio unit, comprising:a plurality of antennas;a plurality of transmitting circuits;a plurality of receiving circuits;a first switch which is connected with one of said plurality of transmitting circuits and selects one of said plurality of antennas;a second switch which is connected with said first switch and selects said one or the other of said plurality of transmitting circuits;a third switch which is connected with said second switch and one or more of said plurality of receiving circuits and selects one of said plurality of transmitting circuits or said one or more of said plurality of receiving circuits;a judging circuit which controls the switching of said first and second switches according to a level of received field strength to be detected by said receiving circuit connected with said third switch;wherein said one of said plurality of transmitting circuits is connected through said first to third switches with said selected one of said plurality of antennas.