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:
Dec. 15, 2009
Filed:
Aug. 08, 2005
David E. Meharry, Lexington, MA (US);
Stephen A. Hedges, Nashua, NH (US);
David E. Meharry, Lexington, MA (US);
Stephen A. Hedges, Nashua, NH (US);
BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Abstract
An enhanced duplexer () which includes a combination of high dynamic range (HDR) amplifiers () and a naovel signal cancellation circuit topology (). Return signals from the circulator () are fed into the first HDR amplifier (). A portion of the transmit signal is sampled with a directional coupler () and amplified with a second HDR amplifier () and then combined with the output of the first HDR amplifier () using a second directional coupler (). The gain and phase of the second io amplifier () are adjusted so the leakage signals are canceled () to enable a radar system to simultaneously transmit and receive signals to and from an antenna with increased sensitivity of operation.