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:
Feb. 04, 2003
Filed:
Aug. 13, 2001
Chad M. Wangsvick, Tucson, AZ (US);
Gary M. Salvail, Tucson, AZ (US);
Mark E. Kusbel, Tucson, AZ (US);
Raytheon Company, Lexington, MA (US);
Abstract
A signal divider/combiner ( ) and method combines first and second frequency signals received by microstrip patch antennas ( ). A first transmission line stub ( ) blocks the second frequency signals on the first signal receiving path, and a second transmission line stub ( ) blocks the first frequency signals on the second signal receiving path providing increased signal levels at a receiver input ( ). In one embodiment, the transmission line stubs are open-circuit stubs and are positioned a quarter-wavelength from a combining junction ( ) formed from stripline transmission lines ( ). The transmission line stubs ( ) also reduce radiation of the first frequency signal by the second antenna as well as radiation of the second frequency signal by the first antenna. In one embodiment, the first and second frequency signals are the L and L signals provided by the Global Positioning System.