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. 21, 1978
Filed:
Jun. 01, 1976
Allen Loy Davidson, Crystal Lake, IL (US);
Ronald Joseph Wanat, Elgin, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
The coupler accepts four independent RF input signals, divides each input into four equal parts, and applies each part to one of four adjoining output ports. Each input signal divided part is phase shifted a multiple of 90.degree. whereby the output ports, taken in the proper order, are in phase quadrature. The novel coupler comprises four hybrid couplers, all of which are fabricated on a dielectric substrate. The hybrid couplers are located on the substrate in a unique interleaved configuration whereby intercouplings are formed between selected hybrid couplers. The interleaved construction results in the electrical length of all intercouplings being controlled and, preferably, all are the same length.