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:
Feb. 01, 1994
Filed:
Mar. 07, 1991
Applicant:
Inventors:
Heinz P Bohlen, Chelmsford, GB;
Roy Heppinstall, Witham, GB;
Assignee:
EEV Limited, Essex, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H03F / ;
U.S. Cl.
CPC ...
330 45 ; 315-538 ; 315-535 ; 315-539 ;
Abstract
In a klystron, or other device which uses modulation of an electron beam to produce amplification of an applied high frequency signal, a collector is used to receive electrons of the beam after the amplified signal has been coupled from the device. Any secondary electrons produced by the impact of high energy electrons on the collector surface are prevented from returning back along the klystron by a periodic magnetic field produce by magnets which coaxially surround the collector.