JPS6348382B2 - - Google Patents
Info
- Publication number
- JPS6348382B2 JPS6348382B2 JP1039281A JP1039281A JPS6348382B2 JP S6348382 B2 JPS6348382 B2 JP S6348382B2 JP 1039281 A JP1039281 A JP 1039281A JP 1039281 A JP1039281 A JP 1039281A JP S6348382 B2 JPS6348382 B2 JP S6348382B2
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- helix
- attenuator
- slow
- 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
Links
- 239000004020 conductor Substances 0.000 claims description 15
- 238000010894 electron beam technology Methods 0.000 description 8
- 230000001902 propagating effect Effects 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/24—Slow-wave structures, e.g. delay systems
- H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
Landscapes
- Microwave Tubes (AREA)
Description
【発明の詳細な説明】
本発明はヘリツクス形進行波管用遅波回路の高
周波減衰器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency attenuator for a slow wave circuit for a helical traveling wave tube.
周知のとうり、進行波管は電子ビームを射出す
るための電子銃部と、電子ビームと電磁波が相互
作用する遅波回路部と、電磁波との相互作用を終
了した電子を捕集するためのコレクタ部と、電磁
波を遅波回路に導びく入力用高周波窓と電磁波を
外部にとり出すための出力用高周波窓と電子を集
束するための集束装置によつて構成されている。
この中で、遅波回路は入力用高周波窓から入つた
電磁波の位相速度を、電子ビームとほぼ同じ速度
まで小さくし両者の同期関係を保持することによ
つて増幅作用を引き起こすもので、その途中には
発振防止のため１個または複数個の高周波減衰器
を備えている。この遅波回路は、その構造により
ヘリツクス形進行波管用遅波回路、結合空胴形進
行波管用遅波回路等いくつかの種類があり、本発
明はそのうち、ヘリツクス形進行波管用遅波回路
に関する。 As is well known, a traveling wave tube consists of an electron gun section for emitting an electron beam, a slow wave circuit section where the electron beam and electromagnetic waves interact, and a slow wave circuit section for collecting the electrons that have finished interacting with the electromagnetic waves. It consists of a collector section, an input high frequency window for guiding electromagnetic waves to a slow wave circuit, an output high frequency window for taking out electromagnetic waves to the outside, and a focusing device for focusing electrons.
Among these, the slow wave circuit causes an amplification effect by reducing the phase velocity of the electromagnetic wave that enters through the input high frequency window to almost the same speed as the electron beam and maintaining a synchronized relationship between the two. is equipped with one or more high frequency attenuators to prevent oscillation. There are several types of slow wave circuits depending on their structure, such as slow wave circuits for helical traveling wave tubes and slow wave circuits for coupled cavity traveling wave tubes.The present invention relates to slow wave circuits for helical traveling wave tubes. .
従来、ヘリツクス形進行波管用遅波回路は結合
空胴形進行波管用遅波回路と比較して、その構造
的簡単さのために、比較的小電力、または中電力
の高周波増幅管の遅波回路として広く使用されて
きたが、細い線を巻きまわしたヘリツクスを熱伝
導率の低い誘電体で支持する構造であることや、
また高周波減衰器としてはヘリツクスを支持する
誘電体、またはガラス製の真空外囲器にアクアダ
ツクを吹きつけた構造であるため、熱的に弱く、
高周波・高出力の増幅管としては用いられなかつ
た。しかし、近年、ヘリツクス形進行波管は技術
的な進歩により、ヘリツクス自体はかなりの高出
力に耐えられる様になつており、これとともに高
周波減衰器の熱的改善が必要となつてきている。 Traditionally, slow-wave circuits for helical traveling-wave tubes are simpler in structure than slow-wave circuits for coupled-cavity traveling-wave tubes. Although it has been widely used as a circuit, it has a structure in which a helix made of thin wire is supported by a dielectric material with low thermal conductivity.
In addition, the high-frequency attenuator has a structure in which Aquadac is sprayed onto a dielectric material supporting the helix or a glass vacuum envelope, so it is thermally weak.
It was not used as a high-frequency, high-power amplifier tube. However, in recent years, due to technological advances in helical traveling wave tubes, the helix itself has become able to withstand considerably high output power, and along with this, it has become necessary to improve the thermal performance of high frequency attenuators.
本発明は、従来のアクアダツクを誘電体または
ガラス製外囲器に、ヘリツクスを伝搬する高周波
の波長の５倍から15倍の長さに渡つて吹きつけて
構成していた高周波減衰器を内導体と外導体とロ
ス体からなる同軸形減衰器で構成することにより
熱的改善を図るとともに、高周波減衰器を真空外
囲器の中にヘリツクスと軸方向に対して平行に配
置できるため、遅波回路の長さを節約できるヘリ
ツクス形進行波管用遅波回路を提供するものであ
る。 The present invention has developed a high-frequency attenuator, which was constructed by spraying a conventional aquadac onto a dielectric or glass envelope over a length of 5 to 15 times the wavelength of the high-frequency waves propagating through the helix. Thermal improvement is achieved by constructing a coaxial attenuator consisting of an outer conductor and a loss body, and since the high frequency attenuator can be placed in the vacuum envelope parallel to the helix and the axial direction, slow wave The present invention provides a slow wave circuit for a helical traveling wave tube that can save circuit length.
第１図に従来形のヘリツクス形進行波管用遅波
回路の縦断面図を示すが、図において、１はヘリ
ツクス、２は真空外囲器、３は誘電体支持棒、４
はロス体、５は高周波減衰器、６は電子ビーム、
７は入力側高周波窓、８は出力側高周波窓であ
る。 FIG. 1 shows a vertical cross-sectional view of a conventional slow-wave circuit for a helical traveling wave tube. In the figure, 1 is a helix, 2 is a vacuum envelope, 3 is a dielectric support rod, and 4
is a loss body, 5 is a high frequency attenuator, 6 is an electron beam,
7 is an input side high frequency window, and 8 is an output side high frequency window.
一般にヘリツクス形の進行波管では、入力側高
周波窓７からヘリツクス１に入つた電磁波は電子
ビーム６と相互作用をしながら進行し増幅され
る。途中増幅された電磁波はロス体４が誘電体支
持棒３に吹付けられている高周波減衰器５によつ
て吸収されるが、電子ビーム６は変調されてお
り、出力側のヘリツクス１に電磁波を再び励振し
増幅し出力側高周波窓８から外部にとり出され
る。ここで、高周波減衰器５は入力側からの電磁
波と出力側で反射された電磁波を吸収し熱に変換
するもので、通常ロス体４としてはアクアダツ
ク、パイロリテイツクグラフアイト等が用いられ
ており、高出力のヘリツクス形進行波管の場合、
耐熱性に問題がある。又、高周波減衰器として良
好な整合特性を得ようとする場合、ロス体の吹付
分布を軸方向にテーパ状にすることが必要であ
り、通常の高周波減衰器の長さはヘリツクスを伝
搬する電磁波の５倍から15倍程度となり、管球の
長さが長くなるだけでなく、高周波特性に対して
も悪影響を及ぼすことが知られている。 In general, in a helix-shaped traveling wave tube, electromagnetic waves entering the helix 1 from the input side high frequency window 7 travel while interacting with the electron beam 6 and are amplified. The electromagnetic waves amplified on the way are absorbed by the high frequency attenuator 5 in which the loss body 4 is blown onto the dielectric support rod 3, but the electron beam 6 is modulated and sends the electromagnetic waves to the helix 1 on the output side. It is excited and amplified again and is taken out from the output side high frequency window 8. Here, the high frequency attenuator 5 absorbs the electromagnetic waves from the input side and the electromagnetic waves reflected at the output side and converts them into heat, and the loss body 4 is usually made of aquadac, pyrolyte graphite, etc. , for a high-power helical traveling wave tube,
There is a problem with heat resistance. In addition, when trying to obtain good matching characteristics as a high-frequency attenuator, it is necessary to make the spray distribution of the loss body tapered in the axial direction, and the length of a normal high-frequency attenuator is determined by the length of the electromagnetic wave propagating through the helix. It is known that it not only increases the length of the tube, but also has a negative effect on high frequency characteristics.
次に、本発明の実施例を図面を参照して説明す
る。 Next, embodiments of the present invention will be described with reference to the drawings.
第２図、第３図はそれぞれ本発明の縦断面図と
横断面図を示す。図において、９は入力側高周波
減衰器、１０は出力側高周波減衰器、１１は内導
体、１２は外導体、１３はロス体である。図から
わかる様に、内導体１１と外導体１２とロス体１
３とによつて構成された同軸形減衰器を２個軸方
向の１部空間に径方向断面である角度ずらして配
置し入力側高周波減衰器と出力側高周波減衰器と
している。なお、各減衰器の内導体１１は入力側
と出力側に分割されたそれぞれのヘリツクス１と
電気的に接続されている。同軸形減衰器のロス体
としては炭化処理したセラミツク等の耐電力性の
高い材料を使用でき、外導体１２と内導体は真空
外囲器２にろう付することができるので、従来の
アクアダツク等を吹きつけた高周波減衰器と比べ
てすぐれた耐電力性を有している。又、同軸形高
周波減衰器の長さは、自由空間波長程度の長さで
十分な整合特性が得られるので、従来の遅波回路
と比べてかなり管球の長さを短縮できる。 FIGS. 2 and 3 show a longitudinal section and a transverse section, respectively, of the present invention. In the figure, 9 is an input side high frequency attenuator, 10 is an output side high frequency attenuator, 11 is an inner conductor, 12 is an outer conductor, and 13 is a loss body. As can be seen from the figure, the inner conductor 11, the outer conductor 12, and the loss body 1
Two coaxial attenuators constituted by 3 and 3 are arranged in a partial space in the axial direction and are shifted by an angle corresponding to a radial cross section to form an input side high frequency attenuator and an output side high frequency attenuator. Note that the inner conductor 11 of each attenuator is electrically connected to each helix 1 divided into an input side and an output side. As the loss body of the coaxial attenuator, a material with high power resistance such as carbonized ceramic can be used, and the outer conductor 12 and the inner conductor can be brazed to the vacuum envelope 2, making it possible to use conventional aquadac etc. It has superior power durability compared to high frequency attenuators sprayed with Further, since sufficient matching characteristics can be obtained with the length of the coaxial high-frequency attenuator approximately equal to the free space wavelength, the length of the tube can be considerably shortened compared to conventional slow-wave circuits.
次に、本発明の適用により遅波回路の軸方向長
さを極端に短かくできる別の実施例を第４図と第
５図に示す。第４図は縦面図であり第５図は横断
面である。図からわかる様に、入力側高周波減衰
器９と出力側ヘリツクス１、出力側高周波減衰器
１０と入力側ヘリツクス１は軸方向に対して交互
に重なり合う様に配置する。このとき、高周波減
衰器の外導体１２とヘリツクスとの間の距離ｌは
ヘリツクス１を伝搬する電磁波に影響しない程度
の長さとし、これはヘリツクス平均半径をａとす
ると、（ａ＋ｌ）／ａの値が1.5以上になる様なｌ
に対応する。この様にそれぞれの高周波減衰器を
配置すれば、これと軸方向に対して平行に位置し
ているヘリツクス１は電子ビームと相互作用する
ことができ電磁波を増幅することができる。よつ
て、本実施例によれば、高周波減衰器による管球
の長さ増加を極端に節約でき、又耐電力性のすぐ
れた高周波減衰器を提供できる。 Next, FIG. 4 and FIG. 5 show another embodiment in which the axial length of the slow wave circuit can be extremely shortened by applying the present invention. FIG. 4 is a longitudinal section and FIG. 5 is a cross section. As can be seen from the figure, the input side high frequency attenuator 9 and the output side helix 1, and the output side high frequency attenuator 10 and the input side helix 1 are arranged so as to alternately overlap in the axial direction. At this time, the distance l between the outer conductor 12 of the high-frequency attenuator and the helix is set to a length that does not affect the electromagnetic waves propagating through the helix 1, and this is the value of (a+l)/a, where a is the average radius of the helix. l such that is 1.5 or more
corresponds to By arranging each high frequency attenuator in this manner, the helix 1 located parallel to the high frequency attenuator in the axial direction can interact with the electron beam and amplify the electromagnetic wave. Therefore, according to this embodiment, an increase in the length of the tube due to the high frequency attenuator can be extremely reduced, and a high frequency attenuator with excellent power durability can be provided.
以上、本発明の実施例を２分割のヘリツクス形
進行波管用遅波回路に適用して説明したが２分割
以上に分割されたヘリツクス形進行波管用遅波回
路に適用できることは明らかである。 Although the embodiments of the present invention have been described above as being applied to a slow wave circuit for a helical traveling wave tube divided into two parts, it is clear that the invention can be applied to a slow wave circuit for a helical traveling wave tube divided into two or more parts.
第１図は従来の進行波管用遅波回路の縦断面
図、第２図、第３図は本発明の一実施例の縦断面
図と横断面図、第４図、第５図は本発明の一実施
例の縦断面図と横断面図を示す。
１……ヘリツクス、２……真空外囲器、３……
誘電体支持棒、４，１３……ロス体、５……高周
波減衰器、６……電子ビーム、７……入力側高周
波窓、８……出力側高周波窓、９……入力側高周
波減衰器、１０……出力側高周波減衰器、１１…
…内導体、１２……外導体。
FIG. 1 is a vertical cross-sectional view of a conventional slow-wave circuit for traveling wave tubes, FIGS. 2 and 3 are vertical cross-sectional views and cross-sectional views of an embodiment of the present invention, and FIGS. 4 and 5 are views of the present invention. 1 shows a longitudinal cross-sectional view and a cross-sectional view of one embodiment of the invention. 1... Helix, 2... Vacuum envelope, 3...
Dielectric support rod, 4, 13...loss body, 5...high frequency attenuator, 6...electron beam, 7...input side high frequency window, 8...output side high frequency window, 9...input side high frequency attenuator , 10... Output side high frequency attenuator, 11...
...Inner conductor, 12...Outer conductor.
Claims (1)
出力高周波窓と高周波減衰器とによつて構成され
るヘリツクス形進行波管用遅波回路において、前
記高周波減衰器を内導体と外導体とロス体とから
なる少なくとも２個の同軸形減衰器で構成し、分
割されたヘリツクスと内導体とを電気的に接続
し、前記ヘリツクスと真空外囲器の間に同軸形減
衰器を配設したことを特徴とするヘリツクス形進
行波管用遅波回路。1. In a slow wave circuit for a helix-shaped traveling wave tube, which is composed of a helix, a vacuum envelope, a dielectric support rod, an input/output high frequency window, and a high frequency attenuator, the high frequency attenuator is connected to an inner conductor, an outer conductor, and a loss At least two coaxial attenuators consisting of a conductor and an inner conductor are electrically connected to each other, and the coaxial attenuator is disposed between the helix and the vacuum envelope. A slow-wave circuit for helical traveling wave tubes characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1039281A JPS57124836A (en) | 1981-01-27 | 1981-01-27 | Slow-wave circuit for helix-type traveling-wave tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1039281A JPS57124836A (en) | 1981-01-27 | 1981-01-27 | Slow-wave circuit for helix-type traveling-wave tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57124836A JPS57124836A (en) | 1982-08-03 |
| JPS6348382B2 true JPS6348382B2 (en) | 1988-09-28 |
Family
ID=11748848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1039281A Granted JPS57124836A (en) | 1981-01-27 | 1981-01-27 | Slow-wave circuit for helix-type traveling-wave tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57124836A (en) |
-
1981
- 1981-01-27 JP JP1039281A patent/JPS57124836A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57124836A (en) | 1982-08-03 |
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