JPS61232534A - Electron gun associated with grid for microwave tube - Google Patents
Electron gun associated with grid for microwave tubeInfo
- Publication number
- JPS61232534A JPS61232534A JP7390585A JP7390585A JPS61232534A JP S61232534 A JPS61232534 A JP S61232534A JP 7390585 A JP7390585 A JP 7390585A JP 7390585 A JP7390585 A JP 7390585A JP S61232534 A JPS61232534 A JP S61232534A
- Authority
- JP
- Japan
- Prior art keywords
- grid
- electrode
- cathode
- grid electrode
- electron gun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/06—Electron or ion guns
- H01J23/065—Electron or ion guns producing a solid cylindrical beam
Landscapes
- Microwave Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、マイクロ波管の格子付電子銃における格子
電極の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a grid electrode in a grid-equipped electron gun for a microwave tube.
マイクロ波管は、電子ビームを射出し形成する電子銃、
電子ビームと相互作用し、高周波電力を増幅する高周波
回路、相互作用後の電子ビームを捕捉するコレクタ、電
子ビームを集束させる集束磁界装置からな゛っている。A microwave tube is an electron gun that emits and forms an electron beam.
It consists of a high-frequency circuit that interacts with the electron beam and amplifies the high-frequency power, a collector that captures the electron beam after interaction, and a focusing magnetic field device that focuses the electron beam.
マイクロ波管においては電子ビームの形状が乱れている
と、電子ビームが高周波回路に入って熱損を生じ、回路
に障害を与えたり、効率を低下させたりする。そこで電
子ビームを整形するため、電子銃忙はウェネルト電極が
存在する。通常ウェネルト電極は陰極と同電位に保たれ
る。第２図は格子電極がない場合の電子銃構造であり、
回転対称構造になっているので半分だけが描かれている
。In a microwave tube, if the shape of the electron beam is disordered, the electron beam will enter the high frequency circuit and cause heat loss, causing damage to the circuit or reducing efficiency. In order to shape the electron beam, a Wehnelt electrode is present in the electron gun. Usually the Wehnelt electrode is held at the same potential as the cathode. Figure 2 shows the electron gun structure without grid electrodes.
Because it has a rotationally symmetrical structure, only half is shown.
ｌは陰極、２は陽極、３はウェネルト電極である。1 is a cathode, 2 is an anode, and 3 is a Wehnelt electrode.
格子電極がない場合には、ウェネルト電極３は第２図に
示すように、陰極端を通り陰極端における陰極面の法線
と６７．５度の角をなす面を有しているニウェネルト電
惟がこの面を持つことによって、電子は陰極面から垂直
に進むことができる。In the absence of a grid electrode, the Wehnelt electrode 3 is a Niwehnelt electrode having a surface that passes through the cathode end and forms an angle of 67.5 degrees with the normal to the cathode surface at the cathode end, as shown in FIG. Having this surface allows electrons to travel perpendicularly from the cathode surface.
第３図は従来技術による格子付電子銃の構造である。４
はしやへい格子電極、５は制御格子電極であり、６はし
やへい格子支持体、７は制御格子支持体である。格子電
極以外は回転対称構造であるが、格子電極は第４図に示
すように、放射状の導体を持っている。通常、支持体も
導体で作られ、それぞれが支持している格子電極と同電
位を持っている。また、陰極１．し中へい格子電極４．
ウェネルト電極３は同電位に保たれる。格子付電子銃で
は、ウェネルト電極３と陰極ｌとの間に格子電極の支持
体６，７が入ってくるので、ウェネルト電極３が前述の
面を持つことができず、この面をのぞいた部分によって
電子ビーム整形を行っていた。FIG. 3 shows the structure of an electron gun with a grid according to the prior art. 4
The cylindrical grid electrode, 5 is a control grid electrode, 6 is a cylindrical grid support, and 7 is a control grid support. The structure other than the grid electrode is rotationally symmetrical, but the grid electrode has radial conductors as shown in FIG. The supports are also usually made of conductors, each having the same potential as the grid electrode it supports. In addition, cathode 1. Inside grid electrode 4.
Wehnelt electrode 3 is kept at the same potential. In the electron gun with a grid, the supports 6 and 7 of the grid electrode are inserted between the Wehnelt electrode 3 and the cathode l, so the Wehnelt electrode 3 cannot have the above-mentioned surface, and the part outside this surface is The electron beam was shaped by
このような従来の電極構造では、電子ビーム整形を行う
ウェネルト電極の形状が制限され、そのため電子ビーム
を十分に整形することができないという欠点がある。Such a conventional electrode structure has a drawback in that the shape of the Wehnelt electrode that shapes the electron beam is limited, and therefore the electron beam cannot be shaped sufficiently.
本発明の目的は、電子ビームの乱れが非常に小さくなる
マイクロ波管用格子付電子銃を提供することである。An object of the present invention is to provide an electron gun with a grating for a microwave tube in which the disturbance of the electron beam is extremely small.
本発明は、陰極、陽極、ウェネルト電極、しゃへい格子
電極、しゃへい格子支持体、制御格子電極、制御格子支
持体を有するマイクロ波管用の格子付電子銃において、
制御格子電極またはその支持体が、陰極端における陰極
面の法線と６０度〜６７．５度をなす面を有し、さらに
、しやへい格子電極またはその支持体の端部がこの法線
と約６ｚ″５度をなして陰極端を通る面に接するように
構成されていることを特徴とする。The present invention provides a grid-equipped electron gun for a microwave tube having a cathode, an anode, a Wehnelt electrode, a shielding grid electrode, a shielding grid support, a control grid electrode, and a control grid support.
The control grid electrode or its support has a plane that makes an angle of 60 degrees to 67.5 degrees with the normal to the cathode surface at the cathode end, It is characterized in that it is configured to form an angle of about 6z''5 degrees with the surface passing through the cathode end.
次に、本発明について、図面を参照して説明する。第１
図は本発明の一実施例の格子付電子銃である。格子のな
い電子銃ではウェネルト電極が電子ビーム整形の作用を
するが、格子電極がある場合には、格子電極の支持体の
ために、ウェネルト電極の形状は制限されている。しか
し、ウェネルト電極の電子ビーム整形作用を、しやへい
格子電極や制御格子電極、およびそれらの支持体によっ
ておきかえることができる。第１図のしゃへい格子電極
４はレヤへい格子支持体付近で、陰極端を通る陰極面の
法線から６７．５度の角をなすやはり陰極端を通る面に
接している・このようにして。Next, the present invention will be explained with reference to the drawings. 1st
The figure shows an electron gun with a grid according to an embodiment of the present invention. In an electron gun without a grid, the Wehnelt electrode functions to shape the electron beam, but when a grid electrode is present, the shape of the Wehnelt electrode is limited by the support of the grid electrode. However, the electron beam shaping effect of the Wehnelt electrode can be replaced by a rigid grid electrode, a control grid electrode, and their supports. The shielding grid electrode 4 of FIG. 1 is in contact with a surface which also passes through the cathode end and which forms an angle of 67.5 degrees from the normal to the cathode surface passing through the cathode end, near the layered shield grid support. .
ウェネルト電極３のビーム整形作用の１部をしやへい格
子電極４によっておきかえている。また、制御格子支持
体７は、陰極端を通る陰極面の法線から６７．５度の面
に接するようにおかれている。A part of the beam shaping effect of the Wehnelt electrode 3 is replaced by a thin grid electrode 4. Further, the control grid support 7 is placed in contact with a plane at 67.5 degrees from the normal to the cathode surface passing through the cathode end.
この面は陰極端を通らない。制御格子電極５は、動作時
に一定の電圧が印加される。この時のポテンシャル分布
が、格子電極を持たない第２図の構造で、陽極電圧を同
じとした場合のポテンシャル分布に一致すれば、電子ビ
ームは非常に良く整形される。動作時には、第２図の等
ポテンシャル線８は、陰極付近では、陰極端を通る陰極
面の法線と６７．５度をなす。従って、第１図の制御格
子電極支持体は、等ポテンシャル線上にのっていること
になり、電子ビーム整形の作用をする。制御格子支持体
をどの等ポテンシャル上にのせるかは、陽極電圧、制御
格子電圧に依存する。また、一般に、第２図の動作時の
等ポテンシャル線は、陰極端を通る陰極面の法線から離
れるにつれて、この法線となす角が６７．５度よりも小
さくなる。この傾向は陰極の集束半角の大きい高パービ
アンス電子銃はど強い。従って、制御格子支持体と陰極
端を通る陰極面の法線のなす角は、６０度〜６７．５度
とするのが良い。This surface does not pass through the cathode end. A constant voltage is applied to the control grid electrode 5 during operation. If the potential distribution at this time matches the potential distribution when the anode voltage is the same in the structure shown in FIG. 2 without a grid electrode, the electron beam will be shaped very well. In operation, the equipotential line 8 of FIG. 2, near the cathode, makes an angle of 67.5 degrees with the normal to the cathode surface passing through the cathode tip. Therefore, the control grid electrode support shown in FIG. 1 is placed on the equipotential line and acts to shape the electron beam. The equipotential on which the control grid support is placed depends on the anode voltage and the control grid voltage. Further, in general, as the equipotential lines during operation in FIG. 2 move away from the normal line of the cathode surface passing through the cathode tip, the angle formed with this normal line becomes smaller than 67.5 degrees. This tendency is most pronounced in high-perveance electron guns with a large cathode focusing half angle. Therefore, the angle formed between the control grid support and the normal to the cathode surface passing through the cathode end is preferably 60 degrees to 67.5 degrees.
以上説明したように本発明は、制御格子電極またはその
支持体が、陰極端における陰極面の法線と６０〜６７．
５度をなす面を有し、さらに、しゃへい格子電極または
その支持体の端部が、前記法線と約６７．５度をなす陰
極端を通る面に接するように構成されているので電子ビ
ームを良好に整形することができる。As explained above, in the present invention, the control grid electrode or its support has an angle of 60 to 67 mm with respect to the normal to the cathode surface at the cathode end.
The shielding grid electrode has a surface that forms an angle of 5 degrees, and is configured such that the end of the shielding grid electrode or its support is in contact with a surface that passes through the cathode end and forms an angle of about 67.5 degrees with the normal line, so that the electron beam can be shaped well.
【図面の簡単な説明】
第１図は本発明の一実施例の格子付電子銃の断面図、第
２図は格子′電極がない場合の電子銃の断面図、第３図
は従来技術による格子付電子銃の断面図、第４図は電子
銃の中心軸方向から見たじゃへい、または制御格子電極
の形状を示している。
１・・・・・・陰極、２・・・・・・陽極、３°旧°゛
ウエネルト電極、４・・°・・・しやへい格子電極、５
・・・・・・制御格子電極、６・・・・・・しやへい格
子支持体、７・−・・・・制御格子支持体、８・・・・
・・等ポテンシャル線。
茅 ２Ｉ！Ｉ
半３図[Brief Description of the Drawings] Fig. 1 is a sectional view of an electron gun with a grid according to an embodiment of the present invention, Fig. 2 is a sectional view of an electron gun without a grid' electrode, and Fig. 3 is a sectional view of an electron gun according to the prior art. FIG. 4, a cross-sectional view of the electron gun with a grid, shows the shape of the jaw or control grid electrode when viewed from the central axis direction of the electron gun. 1...Cathode, 2...Anode, 3° old ° Wehnelt electrode, 4...°...Shiyahei lattice electrode, 5
... Control grid electrode, 6 ... Shiyahei grid support, 7 ... Control grid support, 8 ...
... Equipotential lines. Kaya 2I! I Half 3 figures
Claims (1)
へい格子支持体、制御格子電極、制御格子支持体を有す
るマイクロ波管用の格子付電子銃において、制御格子電
極またはその支持体が、陰極端における陰極面の法線と
６０〜６７．５度をなす面を有し、かつ、しゃへい格子
電極またはその支持体の端部が、前記法線と約６７．５
度をなして陰極端を通る面に接するように構成されてい
ることを特徴とするマイクロ波管用格子付電子銃。In a grid-equipped electron gun for a microwave tube having a cathode, an anode, a Wehnelt electrode, a shielding grid electrode, a shielding grid support, a control grid electrode, and a control grid support, the control grid electrode or its support is connected to the cathode surface at the cathode end. has a surface that makes an angle of 60 to 67.5 degrees with the normal line, and the end of the shielding grid electrode or its support is at an angle of about 67.5 degrees with the normal line.
An electron gun with a grating for a microwave tube, characterized in that the electron gun is configured to be in contact with a surface passing through a cathode end at an angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7390585A JPS61232534A (en) | 1985-04-08 | 1985-04-08 | Electron gun associated with grid for microwave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7390585A JPS61232534A (en) | 1985-04-08 | 1985-04-08 | Electron gun associated with grid for microwave tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61232534A true JPS61232534A (en) | 1986-10-16 |
Family
ID=13531667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7390585A Pending JPS61232534A (en) | 1985-04-08 | 1985-04-08 | Electron gun associated with grid for microwave tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61232534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998054744A1 (en) * | 1996-04-20 | 1998-12-03 | Eev Limited | Electron gun with a diamond grid |
-
1985
- 1985-04-08 JP JP7390585A patent/JPS61232534A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998054744A1 (en) * | 1996-04-20 | 1998-12-03 | Eev Limited | Electron gun with a diamond grid |
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