JPH0740467B2 - Traveling wave tube - Google Patents
Traveling wave tubeInfo
- Publication number
- JPH0740467B2 JPH0740467B2 JP23957586A JP23957586A JPH0740467B2 JP H0740467 B2 JPH0740467 B2 JP H0740467B2 JP 23957586 A JP23957586 A JP 23957586A JP 23957586 A JP23957586 A JP 23957586A JP H0740467 B2 JPH0740467 B2 JP H0740467B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- outer conductor
- coaxial
- coaxial circuit
- traveling wave
- 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.)
- Expired - Fee Related
Links
Landscapes
- Microwave Tubes (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、同軸回路の構造に関するものである。The present invention relates to the structure of a coaxial circuit.
第２図は例えば実開昭54−25062号公報に示された従来
の進行波管の部分断面図である。（１）は電子ビームを
集束する磁気回路、（２）はマイクロ波の伝送線路であ
る螺旋回路、（３）は螺旋回路（２）の端部に接続し
て、螺旋回路（２）との信号の授受を担う同軸回路であ
り、セラミツク窓（４）、内導体（５）及びキヤツプ
（６）から成る窓の集合体（７）と外導体（８）とをろ
う付けすることにより組み立てられている。FIG. 2 is a partial sectional view of a conventional traveling wave tube disclosed in, for example, Japanese Utility Model Publication No. 54-25062. (1) is a magnetic circuit that focuses the electron beam, (2) is a spiral circuit that is a microwave transmission line, (3) is connected to the end of the spiral circuit (2), and is connected to the spiral circuit (2). A coaxial circuit for transmitting and receiving signals, which is assembled by brazing a window assembly (7) consisting of a ceramic window (4), an inner conductor (5) and a cap (6) and an outer conductor (8). ing.
従来の同軸回路の組立ては、第２図の於く窓の集合体
（７）と外導体（８）とをろう材（９）によつてろう付
けして行なつている。このろう付けにより窓の集合体
（７）と外導体（８）は同軸回路を形成すると共に進行
波管内の真空気密が保てる。The conventional coaxial circuit is assembled by brazing the window assembly (7) and the outer conductor (8) shown in FIG. 2 with a brazing material (9). By this brazing, the window assembly (7) and the outer conductor (8) form a coaxial circuit, and at the same time, vacuum tightness in the traveling wave tube can be maintained.
従来の同軸回路は以上の様に組立てられるのであるが、
ろう付け条件あるいはろう付け回数によつては第３図に
示すようにろう材の同軸回路内への流れ込みが生じ、そ
の結果同軸回路内部にろう材が付着し同軸回路部のイン
ピーダンスの不整合を生じる等の問題点があつた。The conventional coaxial circuit is assembled as described above,
Depending on the brazing conditions or the number of times of brazing, as shown in FIG. 3, the brazing material flows into the coaxial circuit, and as a result, the brazing material adheres to the inside of the coaxial circuit and the impedance mismatch of the coaxial circuit part is prevented. There were problems such as occurrence.
この発明は上記のような問題点を解決するためになされ
たもので、ろう付けによつて生じるインピーダンス整合
の劣化を防ぐ構造を有する同軸回路を得ることを目的と
する。The present invention has been made to solve the above problems, and an object thereof is to obtain a coaxial circuit having a structure for preventing the deterioration of impedance matching caused by brazing.
この発明に係る同軸回路は、外導体の内面に切り溝を設
けたものである。同軸回路部は、外導体に切り溝が付く
だけでRF特性に影響をおよぼす寸法は変わらない。The coaxial circuit according to the present invention has a groove formed on the inner surface of the outer conductor. In the coaxial circuit part, the dimensions that affect the RF characteristics do not change only by making a groove on the outer conductor.
この発明においては、同軸回路の外導体に切り溝を入
れ、この溝に同軸回路内部に流れ込むろう材を吸収させ
ることによりろう材の同軸回路内部への流れ込みによる
インピーダンスの不規則変化が抑えられる。In the present invention, the outer conductor of the coaxial circuit is provided with a cut groove, and the brazing material that flows into the coaxial circuit is absorbed in the groove, so that the irregular change in impedance due to the flow of the brazing material into the coaxial circuit is suppressed.
詳細な説明は発明の実施例に示す。A detailed description is given in the examples of the invention.
以下に本発明による同軸回路（３）について図を用いて
説明する。第１図（イ）に示す断面図において、（１）
〜（９）は従来例と同じである。第１図（ロ）は本発明
における同軸回路（３）の断面図で、（10）は本発明に
おける切り溝の入つた外導体である。この外導体に施さ
れた切り溝（11）の幅及び深さは、流れ込むろう材が吸
収できるように決定する。The coaxial circuit (3) according to the present invention will be described below with reference to the drawings. In the sectional view shown in FIG. 1 (a), (1)
(9) is the same as the conventional example. FIG. 1 (B) is a sectional view of the coaxial circuit (3) according to the present invention, and (10) is an outer conductor having a kerf according to the present invention. The width and depth of the kerf (11) formed on the outer conductor are determined so that the brazing material that flows in can absorb it.
以上のように外導体内に切り溝を設けることにより窓の
集合体と外導体とのろう付け時に、外導体内へのろう材
の流れ込みがあつても、この切り溝部で流れ込むろう材
が吸収でき、ろう材によるインピーダンスの変化が抑え
られる。By providing the kerf in the outer conductor as described above, even if the brazing filler metal flows into the outer conductor when brazing the window assembly and the outer conductor, the brazing filler metal that flows in the kerf is absorbed. It is possible to suppress the change in impedance due to the brazing material.
つまり、マイクロ波から見た外導体内径ａは常に一定の
大きさに保たれ、従来のようなろう材による外導体内径
の不規則変化が抑えられ、式で決まる同軸回路の特性
インピーダンスは一定に保たれる。In other words, the inner diameter a of the outer conductor viewed from the microwave is always maintained at a constant size, the irregular change of the inner diameter of the outer conductor due to the conventional brazing material is suppressed, and the characteristic impedance of the coaxial circuit determined by the equation becomes constant. To be kept.
εr:空間媒質の比誘電率 A:外導体半径 B:内導体半径 〔発明の効果〕 以上のように、この発明によればろう材の同軸回路内部
への流れ込みによる同軸部のインピーダンス変化を抑え
るようにしたので、同軸回路のろう付けによるRF特性の
劣化を抑えることができ、高利得の進行波管を提供する
ことができる。 ε r : relative permittivity of spatial medium A: outer conductor radius B: inner conductor radius [Advantages of the Invention] As described above, according to the present invention, the impedance change of the coaxial portion due to the flow of the brazing material into the coaxial circuit is suppressed. Since it is suppressed, it is possible to suppress deterioration of the RF characteristics due to brazing of the coaxial circuit, and it is possible to provide a traveling wave tube with high gain.
【図面の簡単な説明】 第１図（イ）はこの発明の一実施例による進行波管の部
分断面図、同図（ロ）は同軸回路の断面図、第２図は従
来の進行波管の部分断面図、第３図は従来の同軸回路の
断面図である。 図において、（２）は螺旋回路、（３）は同軸回路、
（４）はセラミツク窓、（５）は内導体、（６）はキヤ
ツプ、（７）は窓の集合体、（８）は外導体、（９）は
ろう材、（10）は切り溝を設けた外導体、（11）は切り
溝である。 なお、図中、同一符号は同一、又は相当部分を示す。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a partial sectional view of a traveling wave tube according to an embodiment of the present invention, FIG. 1 (b) is a sectional view of a coaxial circuit, and FIG. 2 is a conventional traveling wave tube. And FIG. 3 is a sectional view of a conventional coaxial circuit. In the figure, (2) is a spiral circuit, (3) is a coaxial circuit,
(4) ceramic window, (5) inner conductor, (6) cap, (7) window assembly, (8) outer conductor, (9) brazing material, (10) kerf The outer conductor provided (11) is a kerf. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
旋回路と接続された内導体及びこの内導体を内部に有し
たほぼ円筒形状の外導体により構成され、外部回路との
信号の授受を担う同軸回路と、セラミックの入力窓及び
出力窓を有し、キャップ部を上記同軸回路の上記外導体
にろう材によって固定して上記同軸回路の内部を真空状
態に保持する窓部とを具備し、上記外導体の上記キャッ
プ部を固定する部分に上記ろう材が流れ込み吸収されう
る形状の切り溝を形成したことを特徴とする進行波管。1. A spiral circuit for transmitting microwaves, an inner conductor connected to the spiral circuit, and a substantially cylindrical outer conductor having the inner conductor therein, for exchanging signals with an external circuit. A coaxial circuit, and a window portion having a ceramic input window and a ceramic output window, the cap portion being fixed to the outer conductor of the coaxial circuit by a brazing material to hold the inside of the coaxial circuit in a vacuum state. A traveling wave tube characterized in that a cut groove having a shape into which the brazing material can flow and be absorbed is formed in a portion of the outer conductor for fixing the cap portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23957586A JPH0740467B2 (en) | 1986-10-07 | 1986-10-07 | Traveling wave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23957586A JPH0740467B2 (en) | 1986-10-07 | 1986-10-07 | Traveling wave tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6394538A JPS6394538A (en) | 1988-04-25 |
| JPH0740467B2 true JPH0740467B2 (en) | 1995-05-01 |
Family
ID=17046834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23957586A Expired - Fee Related JPH0740467B2 (en) | 1986-10-07 | 1986-10-07 | Traveling wave tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0740467B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109727835B (en) * | 2018-12-29 | 2021-06-29 | 中国电子科技集团公司第十二研究所 | Inner conductor for coaxial energy transmission window, coaxial energy transmission window and traveling wave tube |
-
1986
- 1986-10-07 JP JP23957586A patent/JPH0740467B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6394538A (en) | 1988-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |