JPS626297B2 - - Google Patents
Info
- Publication number
- JPS626297B2 JPS626297B2 JP11148979A JP11148979A JPS626297B2 JP S626297 B2 JPS626297 B2 JP S626297B2 JP 11148979 A JP11148979 A JP 11148979A JP 11148979 A JP11148979 A JP 11148979A JP S626297 B2 JPS626297 B2 JP S626297B2
- Authority
- JP
- Japan
- Prior art keywords
- helix
- dielectric
- vacuum envelope
- slow
- wave circuit
- 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
- 239000003989 dielectric material Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011521 glass Substances 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
- H01J23/26—Helical slow-wave structures; Adjustment therefor
Landscapes
- Microwave Tubes (AREA)
Description
【発明の詳細な説明】
本発明はヘリツクス形遅波回路、特にヘリツク
ス支持体の改善に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in helical slow wave circuits, particularly helical supports.
一般にヘリツクス形遅波回路においては、ヘリ
ツクスが誘電体の支持体で囲まれると位相速度が
低下するとともにヘリツクスの横方向インピーダ
ンスも低下して回路損失が増加し、また誘電体の
等価tanδによる損失でも回路損失が増える。 Generally, in a helix-type slow-wave circuit, when the helix is surrounded by a dielectric support, the phase velocity decreases and the lateral impedance of the helix also decreases, increasing circuit loss. Circuit loss increases.
このようにヘリツクスがその支持体である誘電
体に接触または接近する部分が多いとヘリツクス
の電気的特性が非常に悪化するのでヘリツクスを
支持するのに種々の方法が用いられてきた。 If many parts of the helix come into contact with or come close to the dielectric material that supports it, the electrical characteristics of the helix will deteriorate significantly, so various methods have been used to support the helix.
従来技術によるヘリツクス進行波管用遅波回路
は第１図に示すように真空外囲器１、ヘリツクス
支持体２及びヘリツクス５から構成されている。
マイクロ波はヘリツクス５に沿つて伝播しこのと
きヘリツクス５を支持している誘電体棒２によつ
て位相速度の低下および回路損失の増大を生じ
る。このような従来技術によるヘリツクス形進行
波管用遅波回路は真空外囲器の内径とヘリツクス
外径によつて誘電体棒の径が決まつてしまい、ヘ
リツクスに接触する部分の曲率半径が決定され
る。このため電気的特性も決まつてしまう。この
ヘリツクスに接触する部分の曲率半径を小さくし
て、電気的特性を良くするために第２図のような
断面を持つ誘電体を使用する方法があるが、この
ような断面のものは円断面のものに比べて加工が
むずかしくコスト高になる欠点があつた。 A slow wave circuit for a helix traveling wave tube according to the prior art is comprised of a vacuum envelope 1, a helix support 2 and a helix 5, as shown in FIG.
The microwave propagates along the helix 5, causing a decrease in phase velocity and an increase in circuit loss due to the dielectric rod 2 supporting the helix 5. In such conventional slow-wave circuits for helical traveling wave tubes, the diameter of the dielectric rod is determined by the inner diameter of the vacuum envelope and the outer diameter of the helix, and the radius of curvature of the part that contacts the helix is determined. Ru. Therefore, the electrical characteristics are also determined. There is a method of using a dielectric material with a cross section as shown in Figure 2 to reduce the radius of curvature of the part that contacts this helix and improve the electrical characteristics, but such a cross section has a circular cross section. The drawback was that it was difficult to process and expensive compared to conventional methods.
本発明の目的は、以上説明したような従来技術
による遅波回路の欠点を改善したヘリツクス形進
行波管用遅波回路を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a slow-wave circuit for a helical traveling-wave tube, which improves the drawbacks of the conventional slow-wave circuits as described above.
本発明は、真空外囲器と、ヘリツクスと、真空
外囲器に接触してヘリツクスを支える誘電体とを
有するヘリツクス形進行波管用遅波回路におい
て、真空外囲器に接触してヘリツクスを支える誘
電体が平行に置かれた内断面を持つ２本以上の誘
電体棒をろう付又はガラス付した構造を有するこ
とを特徴とする。 The present invention provides a slow-wave circuit for a helix-shaped traveling wave tube that includes a vacuum envelope, a helix, and a dielectric that contacts the vacuum envelope and supports the helix. It is characterized by having a structure in which two or more dielectric rods having inner cross sections placed in parallel are brazed or glass-bonded.
以下図面を参照しながら本発明を詳細に説明す
る。第３図および第４図は本発明の一実施例の断
面図を示す。本発明に係るヘリツクス形進行波管
用遅波回路は、真空外囲器１、円断面を持つ誘電
体棒２，３、ヘリツクス５から構成されており、
誘電体棒２，３は平行に置かれ、ガラス付又はろ
う付されてヘリツクスを支持している。このよう
なヘリツクス形遅波回路において、ヘリツクスに
沿つて伝播し増幅作用を受けるマイクロ波に対し
てヘリツクスに接近又は接触するヘリツクスの支
持体である誘電体は位相速度の低下および回路損
失の増加を起こさせる。しかし、前述したように
第３図の構造によれば、ヘリツクス支持体が円断
面を持つ１本の棒であるときよりもヘリツクスに
接触する部分の曲率半径を小さくできる。また第
４図に示すように２本の誘電体棒２，３の径を適
当に選ぶことにより、真空外囲器１およびヘリツ
クス５の径にかかわらずヘリツクスに接触する部
分の曲率半径を小さくできる利点を有している。
又、比較的容易に製造できる円断面を持つ棒２本
をガラス付又はろう付して使用するためコストが
安くなる利点もある。 The present invention will be described in detail below with reference to the drawings. 3 and 4 show cross-sectional views of one embodiment of the invention. The slow wave circuit for a helical traveling wave tube according to the present invention is composed of a vacuum envelope 1, dielectric rods 2 and 3 having a circular cross section, and a helix 5.
Dielectric rods 2 and 3 are placed in parallel and are glassed or brazed to support the helix. In such a helix-type slow-wave circuit, the dielectric material that supports the helix, which approaches or contacts the helix, reduces the phase velocity and increases the circuit loss for the microwave that propagates along the helix and is amplified. make me wake up However, as described above, according to the structure shown in FIG. 3, the radius of curvature of the portion that contacts the helix can be made smaller than when the helix support is a single bar with a circular cross section. Furthermore, as shown in Fig. 4, by appropriately selecting the diameters of the two dielectric rods 2 and 3, the radius of curvature of the portion that contacts the helix can be made small regardless of the diameters of the vacuum envelope 1 and the helix 5. It has advantages.
In addition, since two rods with circular cross sections, which can be manufactured relatively easily, are used by attaching glass or brazing to each other, there is an advantage that costs are reduced.
尚、第５図に示すように二本以上の誘電体棒を
ガラス付又はろう付した形状にしてもよい。 Incidentally, as shown in FIG. 5, two or more dielectric rods may be glass-attached or brazed.
以上説明したように本発明によれば、複雑な形
状の誘電体を使用せず安価な円断面を持つ誘電体
棒のみで、真空外囲器とヘリツクスの径によらず
ヘリツクスと接触する部分の曲率半径を小さくで
き、かつ誘電体棒の径をそれぞれ適当に選ぶこと
によつてヘリツクスに接触する部分の曲率半径を
自由に選べるためヘリツクスの電気的特性のよい
ヘリツクス形進行波管用遅波回路を提供すること
ができる。 As explained above, according to the present invention, a dielectric rod having an inexpensive circular cross section is used without using a dielectric material having a complicated shape, and the portion that contacts the helix is fixed regardless of the diameter of the vacuum envelope and helix. The slow-wave circuit for a helix-shaped traveling wave tube has good electrical properties because the radius of curvature can be made small, and the radius of curvature of the part that contacts the helix can be freely selected by appropriately selecting the diameter of each dielectric rod. can be provided.
第１図および第２図は従来技術によるヘリツク
ス形遅波回路の断面図、第３図、第４図および第
５図は本発明の実施例の断面図である。
１…真空外囲器、２，３，４…ヘリツクス支持
体用誘電体、５…ヘリツクス。
1 and 2 are cross-sectional views of a helical slow-wave circuit according to the prior art, and FIGS. 3, 4, and 5 are cross-sectional views of an embodiment of the present invention. 1... Vacuum envelope, 2, 3, 4... Dielectric material for helix support, 5... Helix.
Claims (1)
該真空外囲器との間にあつてヘリツクスを支持す
る誘電体とから成るヘリツクス形遅波回路におい
て、前記誘電体は円断面を持つ二本以上の誘電体
棒を接着して形成したことを特徴とするヘリツク
ス形遅波回路。 ２ 誘電体棒は径が異なることを特徴とする特許
請求の範囲第１項記載のヘリツクス形遅波回路。[Scope of Claims] 1. A helical slow wave circuit comprising a helix, a vacuum envelope, and a dielectric supporting the helix between the helix and the vacuum envelope, wherein the dielectric has a circular shape. A helix type slow wave circuit characterized by being formed by bonding two or more dielectric rods with cross sections. 2. The helix type slow wave circuit according to claim 1, wherein the dielectric rods have different diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11148979A JPS5635352A (en) | 1979-08-30 | 1979-08-30 | Helix slow-wave circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11148979A JPS5635352A (en) | 1979-08-30 | 1979-08-30 | Helix slow-wave circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5635352A JPS5635352A (en) | 1981-04-08 |
| JPS626297B2 true JPS626297B2 (en) | 1987-02-10 |
Family
ID=14562556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11148979A Granted JPS5635352A (en) | 1979-08-30 | 1979-08-30 | Helix slow-wave circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5635352A (en) |
-
1979
- 1979-08-30 JP JP11148979A patent/JPS5635352A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5635352A (en) | 1981-04-08 |
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