JPS6436954U

JPS6436954U -

Info

Publication number: JPS6436954U
Application number: JP13256487U
Authority: JP
Priority date: 1987-08-31
Filing date: 1987-08-31
Publication date: 1989-03-06

Description

[Brief explanation of the drawing]

第１図は本考案による直進ビームマイクロ波管
用電子銃の一実施例の縦断面図、第２図は本考案
の他の実施例の縦断面図、第３図は従来の直進ビ
ームマイクロ波管用電子銃の縦断面図である。第
４図はアノード電圧Ｅａ対カソード電流ＩＫのグ
ラフ、第５図は第３図に示す従来例の電子銃の電
極間の電位勾配を示す図、第６図は第１図に示す
本考案の電子銃の電極間電位勾配を示す図である
。（主な参照番号）、１……カソード、２……フ
イラメント、３……集束電極、４……アノード、
５……高周波回路部、６……電子ビーム入口部、
７……誘電体層、８……中空縁電体板、９……絶
縁支持体、１０……カソード支持体、１１……ヒ
ータ導入棒。 Fig. 1 is a longitudinal cross-sectional view of one embodiment of an electron gun for straight beam microwave tubes according to the present invention, Fig. 2 is a longitudinal cross-sectional view of another embodiment of the present invention, and Fig. 3 is a conventional straight beam microwave tube electron gun. FIG. 3 is a longitudinal cross-sectional view of the electron gun. FIG. 4 is a graph of anode voltage Ea versus cathode current IK, FIG. 5 is a graph showing the potential gradient between the electrodes of the conventional electron gun shown in FIG. 3, and FIG. 6 is a graph of the present invention shown in FIG. FIG. 3 is a diagram showing a potential gradient between electrodes of an electron gun. (Main reference numbers), 1... cathode, 2... filament, 3... focusing electrode, 4... anode,
5... High frequency circuit section, 6... Electron beam entrance section,
7... Dielectric layer, 8... Hollow edge electric plate, 9... Insulating support, 10... Cathode support, 11... Heater introduction rod.

Claims

[Claims for Utility Model Registration] A cathode that emits an electron beam, a focusing electrode that focuses the electron beam, and an electron beam passing hole in the center opposite to the focusing electrode, through which the electron beam passes. an anode that accelerates the electron beam and adjusts the amount of the electron beam; further, an entrance portion of a high frequency circuit unit that combines and interacts the electron beam with a high frequency signal is provided opposite to the anode. In the straight-beam microwave tube electron gun, a virtual cone is formed, with the vertical apex angle formed by the inner periphery of the electron beam passage hole of the anode and the outer periphery of the cathode surface facing each other as the apex angle, and the high frequency circuit section as the base. An electron gun for a straight beam microwave tube, characterized in that a dielectric layer is provided on the entire or at least a part of the bottom surface of the high frequency circuit section including the electron beam entrance.