JPH048603Y2 - - Google Patents
Info
- Publication number
- JPH048603Y2 JPH048603Y2 JP1984171302U JP17130284U JPH048603Y2 JP H048603 Y2 JPH048603 Y2 JP H048603Y2 JP 1984171302 U JP1984171302 U JP 1984171302U JP 17130284 U JP17130284 U JP 17130284U JP H048603 Y2 JPH048603 Y2 JP H048603Y2
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- cheese
- distance
- antenna conductor
- structures
- 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
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- Microwave Tubes (AREA)
Description
【考案の詳細な説明】
(イ) 産業上の利用分野
本考案はマグネトロンに関し、特に出力部のチ
ヨーク構造に関する。[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a magnetron, and particularly relates to a chain yoke structure of an output section.
(ロ) 従来の技術
近年、通信用の周波数として高周波帯の利用が
進み、これに応じて雑音規制もより高周波数まで
の規制が望まれ、従つて、マグネトロンにおい
て、多くの高調波成分の抑制が求められている。(b) Conventional technology In recent years, the use of high frequency bands as frequencies for communication has progressed, and accordingly, it is desired that noise regulations be restricted to higher frequencies.Therefore, it is necessary to suppress many harmonic components in magnetrons. is required.
第３図は、例えば特公昭57−31254号公報に見
られる従来例を示す断面図である。１はセラミツ
ク等から成る絶縁筒体、２は該絶縁筒体内を貫通
して配された板状のアンテナ導体、３は該アンテ
ナ導体の先端と電気的に接続された有底筒状の第
１チヨーク構体、４は一方の開口端が第１チヨー
ク構体３の外周面に電気的に接続され、他方の開
口端が絶縁筒体１の開口部に密封的に結合された
第２チヨーク構体、５は第１及び第２チヨーク構
体３，４を包囲するキヤツプ体である。 FIG. 3 is a sectional view showing a conventional example as found in, for example, Japanese Patent Publication No. 57-31254. 1 is an insulating cylindrical body made of ceramic or the like; 2 is a plate-shaped antenna conductor disposed through the insulating cylindrical body; 3 is a bottomed cylindrical first body electrically connected to the tip of the antenna conductor; A second yoke structure 4 has one open end electrically connected to the outer circumferential surface of the first yoke structure 3, and the other open end hermetically coupled to the opening of the insulating cylindrical body 1; is a cap body that surrounds the first and second York structures 3 and 4.
而して、斯る構造において、第１及び第２チヨ
ーク構体３，４の夫々の深さ、即ち図中の1及
び2の長さを任意の高調波波長の約1/4とするこ
とによつて、２種類の高調波の放射を抑制するこ
とができる。 Therefore, in such a structure, the depth of each of the first and second yoke structures 3 and 4, that is, the lengths 1 and 2 in the figure, is set to be approximately 1/4 of the arbitrary harmonic wavelength. Therefore, radiation of two types of harmonics can be suppressed.
(ハ) 考案が解決しようとする問題点
従来例によつて、簡単に高調波の放射を抑制す
ることができるが、抑制せんとする高調波の数だ
けチヨーク構体が必要となるため、構造が複雑と
なる。(c) Problems to be solved by the invention Although harmonic radiation can be easily suppressed using the conventional example, the structure requires as many chiyoke structures as the number of harmonics to be suppressed. It becomes complicated.
本考案の目的は、夫々任意の高調波を抑制する
２つのチヨーク構体から、３つの高調波放射を抑
制することにある。 The purpose of the present invention is to suppress three harmonic emissions from two choke structures, each of which suppresses arbitrary harmonics.
(ニ) 問題点を解決するための手段
本考案は、絶縁筒体と、該絶縁筒体を貫通して
設けられたアンテナ導体と、該アンテナ導体に同
軸的に設けられ、かつ、電気的に接続された第１
チヨーク構体、及び上端部が上記第１チヨーク構
体の側面に接続された第２チヨーク構体を有する
マグネトロンにおいて、上記第２チヨーク構体の
最外側は上記絶縁筒体の開口端に密封的に結合さ
れており、上記第２チヨーク構体の下端部から第
１チヨーク構体の下端部までの距離をａ、第１チ
ヨーク構体の下端部から第２チヨーク構体の上端
部までの距離をｂ、また第１及び第２チヨーク構
体の夫々の上端部間距離をｃとし、上記ａ，ｂ，
ｃにおいて、ｂ及びｂ＋ｃが任意高調波波長の1/
４とし、かつ、2a＋4b＋2cが任意の高調波波長の
１／２としたものである。(d) Means for solving the problem The present invention comprises an insulating cylinder, an antenna conductor provided through the insulating cylinder, and an antenna conductor coaxially provided with the antenna conductor and electrically connected to the antenna conductor. connected first
In the magnetron, the magnetron has a first yoke structure and a second yoke structure whose upper end is connected to a side surface of the first yoke structure; The distance from the lower end of the second cheese structure to the lower end of the first cheese structure is a, the distance from the lower end of the first cheese structure to the upper end of the second cheese structure is b, and the distance between the first and second cheese structures is b. The distance between the upper ends of the two yoke structures is c, and the above a, b,
In c, b and b+c are 1/ of the arbitrary harmonic wavelength.
4, and 2a+4b+2c is 1/2 of the arbitrary harmonic wavelength.
(ホ) 作用
本考案によれば、個別に設けられた２つのチヨ
ーク構体が夫々任意の２つの高調波を抑制すると
共にそれらのチヨーク構体が組み合わされて、も
う１つの任意の高調波の放射を抑制する。(E) Effect According to the present invention, two independently provided chiyok structures each suppress two arbitrary harmonics, and these chiyok structures are combined to suppress the radiation of another arbitrary harmonic. suppress.
(ヘ) 実施例
第１図は、本考案の一実施例を示す断面図であ
るが、その構成は第３図に示したものと同じであ
り、同一部分には同一番号を付している。本考案
の特徴は、任意の高調波の放射を抑制するために
設けられた第１チヨーク構体３及び第２チヨーク
構体４を共用して、更に他の高調波の放射を抑制
するための第３のチヨーク構造を形成した点にあ
る。第２チヨーク構体４の下端開口部からその内
面を経て、第１チヨーク構体３の第２チヨーク構
体４と接する位置からその外面３ａ及び第１チヨ
ーク構体３の内面、更にアンテナ導体２の第２チ
ヨーク構体４の下端開口部に対向する位置までの
距離をある高調波波長の約1/2の長さに形成して
いる。即ち、第２図に示すように、第２チヨーク
構体４の下端部から第１チヨーク構体３の下端部
までの距離をａ，第１チヨーク構体３の下端部か
ら第２チヨーク構体４の上端部までの距離をｂ、
また第２及び第１チヨーク構体４、３の夫々の上
端部間の距離をｃとすると、
2a＋4b＋2c＝１／２×λ／M1
である。また、第１チヨーク構体３及び第２チヨ
ーク構体４については、
2b＋2c＝１／２×λ／M2
2b＝１／２×λ／M3
である。ここで、λは基本波波長、M1，M2，
M3は夫々第M1高調波、第M2高調波及び第M3高
調波を示す。(F) Embodiment Figure 1 is a sectional view showing an embodiment of the present invention, and its configuration is the same as that shown in Figure 3, and the same parts are given the same numbers. . The feature of the present invention is that the first and second yoke structures 3 and 4 provided for suppressing radiation of arbitrary harmonics are used in common, and a third yoke structure is used to suppress radiation of other harmonics. This is due to the formation of a chiyoke structure. From the lower end opening of the second yoke structure 4, through its inner surface, from the position where it contacts the second yoke structure 4 of the first yoke structure 3, to its outer surface 3a and the inner surface of the first yoke structure 3, and further to the second yoke of the antenna conductor 2. The distance to the position facing the lower end opening of the structure 4 is set to approximately 1/2 the length of a certain harmonic wavelength. That is, as shown in FIG. The distance to b,
Further, if the distance between the upper ends of the second and first yoke structures 4 and 3 is c, then 2a+4b+2c=1/2×λ/M 1 . Furthermore, for the first York structure 3 and the second York structure 4, 2b+2c=1/2×λ/M 2 2b=1/2×λ/M 3 . Here, λ is the fundamental wavelength, M 1 , M 2 ,
M 3 represents the M 1st harmonic, the M 2nd harmonic, and the M 3rd harmonic, respectively.
従つて、ａ、ｂ、ｃを夫々
ａ＝λ／４（１／M1−１／M2−１／M3）
ｂ＝λ／４・１／M3
ｃ＝λ／４（１／M2−１／M3）
とすることによつて、第１及び第２チヨーク構体
３，４にて３つの高調波の放射を抑制することが
できる。なお、高調波としては、例えばM1＝２，
M2＝５，M3＝６であり、この時、ａ＝4.1mm，
ｂ＝5.1mm及びｃ＝1.0mmである。 Therefore, a, b, and c are respectively a=λ/4(1/M 1 -1/M 2 -1/M 3 ) b=λ/4・1/M 3 c=λ/4(1/M 2 -1/M 3 ), the radiation of the three harmonics can be suppressed in the first and second yoke structures 3 and 4. Note that, as harmonics, for example, M 1 =2,
M 2 = 5, M 3 = 6, and at this time, a = 4.1 mm,
b=5.1mm and c=1.0mm.
以下、第３のチヨーク構造のチヨーク作用につ
いて詳述する。マイクロ波電流は、アンテナ導体
２から第１チヨーク構体３の内面及び外面を経て
第２チヨーク構体４の内面を流れる。ここで、第
２チヨーク構体４の下端開口部から上方をみた場
合について等価的に考えると、第２図に示すよう
に、線路長＝ａ＋2b＋ｃの平行二線の一端を
短絡したものとして考えられる。この平行二線の
特性インピーダンスをZoとした時、第２チヨー
ク構体４の下端開口部から上方をみたインピーダ
ンスＺは、
Ｚ＝jZotanβ （ただし、β＝2π／λ）
となる。今、2a＋4b＋2cの長さは、ある高調波
の波長λの1/2となつているので、ａ＋2b＋ｃは
λ／４となり、上記インピーダンスＺは無限大と
なる。従つて、この第３のチヨーク構造は、高調
波の放射を抑制することができる。 Hereinafter, the chiyoke effect of the third chiyoke structure will be explained in detail. The microwave current flows from the antenna conductor 2 through the inner and outer surfaces of the first yoke structure 3 and through the inner surface of the second yoke structure 4. Here, if we consider equivalently the case when looking upward from the lower end opening of the second chain yoke structure 4, as shown in FIG. 2, it can be considered that one end of two parallel wires with line length = a + 2b + c are short-circuited. When the characteristic impedance of these two parallel lines is Zo, the impedance Z seen upward from the lower end opening of the second chain yoke structure 4 is Z=jZotanβ (where β=2π/λ). Now, the length of 2a+4b+2c is 1/2 of the wavelength λ of a certain harmonic, so a+2b+c becomes λ/4, and the impedance Z becomes infinite. Therefore, this third chiyoke structure can suppress harmonic radiation.
なお、本実施例において、第１及び第２チヨー
ク構体３，４の上端部３ｂ，４ｂの長さは実際と
して非常に短いものであるため無視して各チヨー
ク構体の長さを決定しているが、これら上端部３
ｂ，４ｂの長さが無視し得ない場合にあつてはこ
れらを含めた全体の長さを考慮する必要がある。 In this embodiment, the lengths of the upper ends 3b and 4b of the first and second yoke structures 3 and 4 are actually very short, so they are ignored in determining the length of each yoke structure. However, these upper end portions 3
If the lengths of b and 4b cannot be ignored, it is necessary to consider the entire length including these.
(ト) 考案の効果
本考案によれば、夫々任意の高調波を抑制する
２つのチヨーク構体を組み合わせることにより、
もう１つの任意の高調波放射を抑制できるため、
構造を複雑にすることなく３つの高調波放射を抑
制することができる。(g) Effects of the invention According to the invention, by combining two chiyoke structures that each suppress arbitrary harmonics,
Another arbitrary harmonic emission can be suppressed, so
Three harmonic emissions can be suppressed without complicating the structure.
第１図及び第２図は本考案の一実施例を示し、
第１図は要部断面図、第２図は等価回路図、第３
図は従来例を示す要部断面図である。
３……第１チヨーク構体、４……第２チヨーク
構体。
1 and 2 show an embodiment of the present invention,
Figure 1 is a sectional view of main parts, Figure 2 is an equivalent circuit diagram, and Figure 3 is a sectional view of the main parts.
The figure is a sectional view of a main part showing a conventional example. 3...First chiyoke structure, 4...Second chiyoke structure.
Claims (1)
アンテナ導体と、該アンテナ導体に同軸的に設け
られ、かつ、電気的に接続された第１チヨーク構
体、及び上端部が上記第１チヨーク構体の側面に
接続された第２チヨーク構体を有するマグネトロ
ンにおいて、上記第２チヨーク構体の最外側は上
記絶縁筒体の開口端に密封的に結合されており、
上記第２チヨーク構体の下端部から第１チヨーク
構体の下端部までの距離をａ、第１チヨーク構体
の下端部から第２チヨーク構体の上端部までの距
離をｂ、また第１及び第２チヨーク構体の夫々の
上端部間距離をｃとし、上記ａ，ｂ，ｃにおい
て、ｂ及びｂ＋ｃが任意高調波波長の1/4であり、
かつ、2a＋4b＋2cが任意の高調波波長の1/2であ
ることを特徴とするマグネトロン。 an insulating cylindrical body, an antenna conductor provided through the insulating cylindrical body, a first York structure provided coaxially with the antenna conductor and electrically connected to the antenna conductor, and an upper end portion of which is connected to the first In a magnetron having a second yoke structure connected to a side surface of the yoke structure, an outermost side of the second yoke structure is hermetically coupled to an open end of the insulating cylindrical body;
The distance from the lower end of the second cheese structure to the lower end of the first cheese structure is a, the distance from the lower end of the first cheese structure to the upper end of the second cheese structure is b, and the distance between the first and second cheese structures is The distance between each upper end of the structure is c, and in the above a, b, and c, b and b+c are 1/4 of the arbitrary harmonic wavelength,
A magnetron characterized in that 2a+4b+2c is 1/2 of an arbitrary harmonic wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984171302U JPH048603Y2 (en) | 1984-11-12 | 1984-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984171302U JPH048603Y2 (en) | 1984-11-12 | 1984-11-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6187445U JPS6187445U (en) | 1986-06-07 |
| JPH048603Y2 true JPH048603Y2 (en) | 1992-03-04 |
Family
ID=30728994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984171302U Expired JPH048603Y2 (en) | 1984-11-12 | 1984-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048603Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5731254B2 (en) * | 1973-03-03 | 1982-07-03 | ||
| JPS60243938A (en) * | 1984-05-18 | 1985-12-03 | Hitachi Ltd | Magnetron |
-
1984
- 1984-11-12 JP JP1984171302U patent/JPH048603Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6187445U (en) | 1986-06-07 |
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