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:
Jul. 23, 2002
Filed:
Aug. 09, 2001
Applicant:
Inventors:
Alan Cha, Glendale, CA (US);
Arun Bhattacharyya, El Segundo, CA (US);
Assignee:
The Boeing Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 1/38 ;
U.S. Cl.
CPC ...
H01Q 1/38 ;
Abstract
A dual-band patch antenna element ( ) for circular or linear polarization. The patch element ( ) is excited by two different hybrids ( ), designed for transmit and receive bands respectively. Each hybrid ( ) electromagnetically couples a pair of orthogonal ground plane slots ( ) that excite the patch antenna ( ). The hybrid ( ) and slot ( ) dimensions for the transmit band are different from the hybrid ( ) and slot ( ) dimensions for the receive band. Isolation can be improved by connecting shunt stubs ( ) to the hybrids ( ).