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:
Aug. 29, 1995
Filed:
Jul. 06, 1992
Hsin-Hsien Chung, San Diego, CA (US);
Jeffrey A Douglass, Poway, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
A dual cavity-backed slot antenna is provided which exhibits a relatively wide frequency bandwidth and dual resonant frequency capabilities. The antenna includes a first substrate board having a bottom conductive surface and a top surface with a conductive feedline etched thereon. A second substrate board is further included having a bottom surface which is bonded to the top surface of the first substrate board. The second substrate board has a top conductive surface with radiating slots etched thereon. First and second conductive cavities are provided which extend from the top conductive surface of the second substrate board to the bottom conductive surface of the first substrate board. Each of the first and second cavities enclose at least one of the radiating slots. By controlling the length of the radiating slots, the distance between the radiating slots and the size of the first and second conductive cavities, one may obtain wider frequency characteristics than that provided by a conventional single cavity slot antenna.