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:
Jan. 25, 2005
Filed:
Mar. 15, 2001
Naofumi Yoneda, Tokyo, JP;
Moriyasu Miyazaki, Tokyo, JP;
Kousaku Yamagata, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The waveguide group branching filter according to the present invention is formed by boring out of two metal blocks constituent circuits including a circular-to-square waveguide multistage transformer, the branch waveguide polarizer/branching filter, a rectangular waveguide multistage transform, the rectangular waveguide H-plane T-branch circuit, and waveguide band-pass filtersand; radio waves Vand H, which have their polarization planes vertical and horizontal, respectively, to the branching plane of the branch waveguide polarizer/branching filterin a certain frequency band f, and a radio wave Vof the same polarization plane as that of the radio wave Vin a frequency band fhigher than the frequency band fare incident to an input port P, and the radio wave Vis emitted from an output port P, the radio wave Hfrom an output port Pand the radio wave Vfrom an output port P