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:
May. 11, 1993
Filed:
Oct. 26, 1990
Applicant:
Inventor:
Keith Squibb, Chelmsford, GB;
Assignee:
EEV Limited, Chelmsford, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
315 3953 ; 333230 ;
Abstract
An output of a magnetron operating in the TM.sub.01 /mode has a ceramic output window which is planar. As ceramic material may have a higher dielectric constant than glass a longer output probe can be used which, combined with the fact that the window is planar, gives good mode purity thus reducing heating and arcing in the window. Ceramic also has a higher melting point than glass which means that cooling of the window is less critical.