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:
Apr. 30, 1991
Filed:
Sep. 02, 1987
Frederick A Young, Huntington Beach, CA (US);
Roy K Rikimaru, Los Angeles, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A microwave filter is composed of a set of circular cylindrical cavities arranged in cascade array and interconnected by irises having cross-slotted apertures for coupling electromagnetic power in two orthogonal TE.sub.113 modes. An input port is formed in a first of the cavities and an output port is formed in a last of the cavities. Each port is constructed as a transition between a section of rectangular waveguide and a section of circular waveguide, the section of circular waveguide being a portion of the first cavity and the last cavity, respectively, in the input and the output ports. The cross-sectional aspect ratio of the rectangular waveguide is 2:1. The ratio of a diameter of the cavity to length, as measured along a cylindrical axis in each cavity, is 0.26 thereby to provide for increased bandwidth while minimizing dispersion and transmission loss.