Patent ID: 6950634
Filing Date: 2005-09-27
Classification: H04B

Abstract:
1. A transceiver circuit arrangement, comprising: a first terminal for receiving a signal for transmission; a second terminal for coupling to an antenna for transmission, and reception of signals; a third terminal for producing a received signal; a first 90 degree hybrid arrangement coupled to a first 180 degree hybrid arrangement for applying a 90 degree phase shift to signals applied thereto; a second 90 degree hybrid arrangement coupled to a first 180 degree hybrid arrangement for applying a 90 degree phase shift to signals applied thereto; a third 90 decree hybrid arrangement coupled to a second 180 degree hybrid arrangement for applying a 90 degree phase shift to signals applied thereto; a fourth 90 degree hybrid arrangement coupled to a second 180 degree hybrid arrangement for applying a 90 degree phase shift to signals applied thereto; the first 180 degree hybrid arrangement coupled to the first terminal for applying a 180 degree phase shift and for splitting and re-combining signals applied thereto; the second 180 degree hybrid arrangement coupled to the second terminal for applying a 180 degree phase shift and for splitting and re-combining signals applied thereto; amplifier means coupled between the first and second terminals for amplifying signals received at the first terminal for transmission via the second terminal in transmission mode; and transmit/receive switch means for disabling the amplifier means in receive mode whereby signals received at the second terminal are reflected to the third terminal.