EP 0402549 B1 19940608 - Travelling-wave tube with a helical delay line made of boron nitride and attached to the vacuum tube.
Title (en)
Travelling-wave tube with a helical delay line made of boron nitride and attached to the vacuum tube.
Title (de)
Lauffeldröhre mit wendelförmiger Verzögerungsleitung, welche mittels dielektrischer Halterungsstäbe aus Bornitrid an der Vakuumhülle befestigt ist.
Title (fr)
Tube à onde progessive comportant une ligne à retard du type en hélice fixée à un fourreau par l'intermédiaire de supports diélectriques en nitrure de bore.
Publication
Application
Priority
FR 8419363 A 19841218
Abstract (en)
[origin: EP0402549A1] The present invention relates to a travelling-wave tube comprising a delay line of the helical type attached to a sleeve by way of dielectric supports made of boron nitride. <??>According to the invention, the boron nitride supports (8) carry a layer (9) of insulating material having a secondary emission coefficient greater than 1, such as for example alumina or beryllia. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 23/26 (2006.01)
CPC (source: EP US)
H01J 23/26 (2013.01 - EP US)
Citation (examination)
DE 4014377 A1 19901108 - RAYTHEON CO [US]
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
FR 2629634 A1 19891006; FR 2629634 B1 19901012; EP 0402549 A1 19901219; EP 0402549 B1 19940608; US 5071055 A 19911210
DOCDB simple family (application)
FR 8419363 A 19841218; EP 89401635 A 19890613; US 82458885 A 19851218