The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2008
Filed:
Mar. 14, 2005
Robert W. Monroe, Melissa, TX (US);
Robert W. Monroe, Melissa, TX (US);
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A transmit-receive (T/R) switch for coupling a TDD transceiver to an antenna. The T/R switch comprises 1) a first circulator having a first port for receiving a transmit signal from the transceiver during transmit mode, a second port for sending the transmit signal to the antenna during transmit mode and receiving a received signal from the antenna during receive mode, and a third port for sending the received signal towards the transceiver during receive mode. The T/R switch further comprises 2) a second circulator having a first port for receiving the received signal from the third port of the first circulator during receive mode and a second port for sending the received signal towards the transceiver during receive mode, and 3) a termination load coupled to a third port of the second circulator. The circulators divert RF energy reflected from the antenna during transmit mode into the termination load.