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:
Oct. 06, 1998
Filed:
May. 10, 1996
Applicant:
Inventor:
Howard N Fudem, Baltimore, MD (US);
Assignee:
Northrop Grumman Corporation, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455326 ; 455317 ;
Abstract
Mini-microstrip and mini-coplanar transmission lines are formed on a ship substrate with two metal layers. Together with a ground plane on the underside of the substrate, the lines are connected to form a Marchand balun. Two baluns, a quarter-wave transmission line and a diode quad are combined on a chip to form an MMIC mixer, and a par of mixers are combined with 90.degree. and 180.degree. splitters to provide circuits with superior rejection of specific spurious signals as well as RF and LO leakage over.