EP 0022016 B1 19831228 - SLOW-WAVE STRUCTURE WITH VARYING PITCH FOR A TRAVELLING-WAVE TUBE, AND TRAVELLING-WAVE TUBE USING SUCH A SLOW-WAVE STRUCTURE
Title (en)
SLOW-WAVE STRUCTURE WITH VARYING PITCH FOR A TRAVELLING-WAVE TUBE, AND TRAVELLING-WAVE TUBE USING SUCH A SLOW-WAVE STRUCTURE
Publication
Application
Priority
FR 7917201 A 19790703
Abstract (en)
[origin: US4371852A] A variable pitch delay line for a travelling wave tube, is constituted by cells constructed in waveguide sections in which takes place the propagation of the electromagnetic waves which are used in the operation of the tube. All the cells are constituted by the same components, namely tops or covers, a ring, supporting rods for the ring and a short-circuit. The variable pitch is obtained by expansion or contraction of the dimensions within the guide cross-section. A significant improvement of the tube efficiency is obtained by the use of lines formed from three sections with different pitches, which succeed one another along the path of the beam, whereof the second section has a smaller pitch and the third section a larger pitch than the first section.
IPC 1-7
IPC 8 full level
H01J 23/26 (2006.01); H01J 23/24 (2006.01); H01J 23/28 (2006.01); H01J 25/38 (2006.01)
CPC (source: EP US)
H01J 23/24 (2013.01 - EP US); H01J 25/38 (2013.01 - EP US)
Citation (examination)
- FR 969886 A 19501227 - CSF
- US 3548246 A 19701215 - THAL HERBERT L JR, et al
- Annales de Radioélectricité, no. 9 (1954) p. 311-328, A. Leblond et al. "Etude des lignes à barreaux à structure périodique, deuxième partie"
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0022016 A1 19810107; EP 0022016 B1 19831228; DE 3065992 D1 19840202; FR 2460539 A1 19810123; FR 2460539 B1 19811127; JP H0119224 B2 19890411; JP S5613641 A 19810210; US 4371852 A 19830201
DOCDB simple family (application)
EP 80400940 A 19800624; DE 3065992 T 19800624; FR 7917201 A 19790703; JP 9121180 A 19800703; US 16354180 A 19800627