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:
Jun. 18, 2002
Filed:
Mar. 28, 2001
Applicant:
Inventors:
Assignee:
Raytheon Company, Lexington, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q 1/36 ;
U.S. Cl.
CPC ...
H01Q 1/36 ;
Abstract
A super thin, cavity free spiral antenna includes a radiating element having a first spiral arm and a second spiral arm formed on a front surface of a first dielectric substrate. In addition, the antenna includes a resonant ground plane formed on a back surface of the first dielectric substrate. From the perspective of the radiating element, the resonant ground plane appears as a back ground plane which is further away from the radiating element than in actuality. As a result, operation in the microstrip mode is provided even without a cavity.