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:
Sep. 01, 2009
Filed:
Mar. 10, 2004
Tadahiro Ohmi, Sendai-shi, Miyagi, JP;
Naohisa Goto, Hachioji-shi, Tokyo, JP;
Nobuhiro Kuga, Kanagawa, JP;
Akihiko Hiroe, Kanagawa, JP;
Tadahiro Ohmi, Sendai-shi, Miyagi, JP;
Naohisa Goto, Hachioji-shi, Tokyo, JP;
Nobuhiro Kuga, Kanagawa, JP;
Akihiko Hiroe, Kanagawa, JP;
Tokyo Electron Limited, Tokyo, JP;
Other;
Abstract
A distributor () includes a square waveguide () to be connected to a microwave oscillator () and a square waveguide () having a plurality of openings () formed in a narrow wall (B). The square waveguide () is hollow. A wave delaying member () having a relative dielectric constant ∈is arranged in the square waveguide (). Narrow walls (A,A) of the two square waveguides () are brought into contact with each other, and a communication hole () through which the two waveguides () communicate with each other is formed in the narrow walls (A,A). The widths of the two waveguides () do not become narrow at their connecting portion even if the width of the communication hole () is decreased. Thus, a band of a frequency that can pass through the connecting portion is suppressed from becoming narrow. Consequently, reflection loss that occurs when the frequency of electromagnetic waves to be input to the distributor () changes can be decreased.