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. 13, 1994
Filed:
Feb. 08, 1993
Applicant:
Inventors:
Steve K Panaretos, Los Angeles, CA (US);
Clifton Quan, Arcadia, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ;
U.S. Cl.
CPC ...
333-11 ; 333238 ;
Abstract
A dual junction back-to-back four-port microstrip circulator made up of two three-port single junction circulators whose substrates lay back-to-back and are interconnected with a coaxial feedthrough. When used in an active antenna array application, the transmit and receive ports will be located on different levels of the device. The back-to-back configuration allows sharing either a single magnet for biasing or a single magnetic shield carrier for bias return, with a magnet on top of each substrate. The circulator has the advantages of small size and operation over a wide frequency band.