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:
Feb. 17, 1976
Filed:
Jun. 24, 1974
Lawrence E Dickens, Baltimore, MD (US);
Douglas W Maki, Arnold, MD (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A balanced microwave diode mixing circuit utilizes the junction of a slot transmission line and a coplanar strip transmission line as the point of diode modulation to provide heterodyne mixing. By the use of slot line type elements formed on one side of a dielectric substrate and strip line type elements formed on the other side, the following features are achieved: (A) input of the local oscillator (LO) signal and output of the intermediate frequency (I.F.) signal are achieved through a common coupling to and from the coplanar strip line at the end of the latter which is remote from the hybrid junction; (B) low reactance at the 'sum frequency' is presented at the hybrid junction; (C) low reactance at the image frequency is presented at the hybrid junction; and (D) high impedance at the input signal frequency is presented at the hybrid junction.