Robert M Broton

US Patent:

43808220, Apr 19, 1983

Filed:

Nov 2, 1981

Appl. No.:

6/317707

Inventors:

Robert M. Broton - Palatine IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 148

US Classification:

455 80

Abstract:

A transmit-receive switching circuit is provided for switching a transmitter and a receiver to common antenna via a common signal path. A circulator is employed in the common signal path. The flow of transmitter RF energy and received RF energy is controlled through the circulator by a selectively actuable impedance element coupled to the circulator.