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:
Jan. 14, 1992
Filed:
Jun. 15, 1989
Applicant:
Inventors:
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
29600 ; 296021 ; 315-35 ; 315-535 ;
Abstract
A delay line for travelling wave tubes, particularly travelling wave tube whose gain and whose output power are independent of frequency over a plurality of octaves and contain a helix (9) in an electrically conductive cylinder (5). The helix is fixed and adjusted by retaining rods (8). Loading webs (4) are arranged parallel to the axis of the adjoining electrically conductive cylinder (5) and a small gap (12) is left free adjacent the helix (9). The extremely high requirement for mechanical dimensional accuracy and reproducibility of the dimensions in such delay lines are obtained by using loading webs (4) which are integrally formed in the electrically conductive cylinder (5).