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:
Oct. 15, 2002
Filed:
Jul. 24, 2000
Applicant:
Inventors:
David Mark Wilcox, Essex, GB;
Darrin Bowler, Essex, GB;
Assignee:
EEV Limited, Essex, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 2/510 ;
U.S. Cl.
CPC ...
H01J 2/510 ;
Abstract
An electron beam tube such as a klystron includes a penultimate resonant cavity (22) located before the output cavity ( ). The penultimate resonant cavity ( ) is arranged to be inductively coupled, being resonant at a frequency which is slightly greater than a harmonic frequency. This provides increased sharpening of bunches of electrons arriving at the output cavity ( ) giving increased efficiency at the output.