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:
Mar. 01, 1994
Filed:
Feb. 23, 1993
Harvey Endler, Van Nuys, CA (US);
Farid Mesghali, Culver City, CA (US);
Systron Donner Corporation, Sylmar, CA (US);
Abstract
A microwave integrated circuit for frequency translation includes a pair of mixers for receiving the input RF signal, mixing it with a pair of quadrature frequency modulation signals and by combining the output of the mixers in a quadrature coupler, suppressing all signals except for the input RF signal plus the modulation frequency. This is accomplished in an environment of high 'g' forces, significant temperature variations and a need for high reliability and fast operation by a miniaturized microwave integrated circuit having microstrips on the top and bottom sides of a ceramic substrate. The mixers consist of quad diode chips which are compression welded to one side of the microstrip for good resistance to high 'g' forces. Suitable balancing is provided by use of a ground plane on the opposite side with tapering. A quadrature coupler to suppress the lower sideband is in the form of a LANGE coupler which is effectively integrated on the top side of the substrate.