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:
Nov. 19, 2019
Filed:
Dec. 14, 2016
Applicant:
Nec Network and Sensor Systems, Ltd., Fuchu-shi, Tokyo, JP;
Inventors:
Norio Masuda, Tokyo, JP;
Takashi Nakano, Tokyo, JP;
Assignee:
NEC NETWORK AND SENSOR SYSTEMS, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 23/24 (2006.01); H01J 25/42 (2006.01); H01P 3/123 (2006.01); H01J 23/28 (2006.01); H01P 11/00 (2006.01);
U.S. Cl.
CPC ...
H01J 23/24 (2013.01); H01J 23/28 (2013.01); H01J 25/42 (2013.01); H01P 3/123 (2013.01); H01P 11/002 (2013.01);
Abstract
Provided are a slow wave circuit and a traveling wave tube suitable for an increase in fineness with regard to processing beam holes, and suitable for higher frequencies. A slow wave circuit () includes a meandering waveguide () and a beam hole () that pierces the meandering waveguide (), and the cross-section of the beam hole () in the direction orthogonal to the long direction is in the shape of a polygon having a larger number of sides than a quadrilateral.