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:
Aug. 27, 1991
Filed:
Oct. 31, 1989
Henry Downs, Portland, ME (US);
Richard I Bibber, Gray, ME (US);
General Signal Corporation, Stamford, CT (US);
Abstract
A directional coupler for coupling r.f. energy in a waveguide system from a main channel waveguide to a subsidiary channel waveguide, the coupling being in the range between about -3 dB to -15 dB. The coupler comprises a single coupling slot at the junction between the main channel waveguide and the subsidiary channel waveguide with an arrangement for decoupling the slot to yield the desired coupling, the arrangement including first and second posts in the plane of the junction. A further provision involves inductively loading the junction, the loading being provided at the plane of the junction. The provision for inductively loading the junction is an 'inverted' button, in the form of capped-off holes, the depth of the holes being adjusted to vary the directivity of the coupler.