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:
Sep. 06, 1977
Filed:
May. 03, 1976
Applicant:
Inventors:
Alfred J Appelbaum, Newton Center, MA (US);
Michael J Collins, Merrimack, NH (US);
Jerome D Hanfling, Framingham, MA (US);
Assignee:
Raytheon Company, Lexington, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q / ;
U.S. Cl.
CPC ...
343768 ; 343771 ; 333 33 ; 333 / ;
Abstract
An improved IFF antenna arrangement is shown to comprise two linear arrays, each one of the arrays being made up of a plurality of similar cavity-backed radiating slots fed by a stripline feed. The impedance of each radiating slot is matched, at two different operating frequencies, to the impedance of a combination of the impedances of the corresponding cavity and stripline feed.