JPH098512A - Waveguide crossing type directional coupler - Google Patents
Waveguide crossing type directional couplerInfo
- Publication number
- JPH098512A JPH098512A JP14992595A JP14992595A JPH098512A JP H098512 A JPH098512 A JP H098512A JP 14992595 A JP14992595 A JP 14992595A JP 14992595 A JP14992595 A JP 14992595A JP H098512 A JPH098512 A JP H098512A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- directional coupler
- coupling
- short side
- type directional
- 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.)
- Withdrawn
Links
Landscapes
- Waveguide Connection Structure (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は導波管十字型方向性結合
器に関し、特に２つの矩形状導波管を各広面を共通にし
て互いに管軸が直交するように接合してこの接合部で結
合孔を設けた導波管十字型方向性結合器に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveguide cross type directional coupler, and in particular, two rectangular waveguides are joined such that their respective broad surfaces are common to each other so that their tube axes are orthogonal to each other. The present invention relates to a waveguide cross type directional coupler having a coupling hole.
【０００２】[0002]
【従来の技術】従来のこの種の導波管十字型方向性結合
器の構成を図２に示す。図２（Ａ）はその斜視図、
（Ｂ）はその断面図である。２本の矩形状導波管１，２
は、各々の広面を共通とし管軸が直交する様に接合され
ている。この接合部の共通面には、十字形の結合孔３
が、２本の導波管の接合面で形成される正方形の対角線
上に１個または２個設けられている。この結合孔３は広
面の円偏波磁界発生箇所に設けられる。2. Description of the Related Art The structure of a conventional waveguide cross type directional coupler of this type is shown in FIG. FIG. 2A is a perspective view thereof,
(B) is a sectional view thereof. Two rectangular waveguides 1 and 2
Are joined so that their respective broad surfaces are common and the tube axes are orthogonal to each other. On the common surface of this joint, a cross-shaped coupling hole 3
, One or two are provided on the diagonal of a square formed by the joining surfaces of the two waveguides. The coupling hole 3 is provided at a place where the circularly polarized magnetic field of the wide surface is generated.
【０００３】このような結合器の結合度は導波管１，２
の長辺ａ及び短辺ｂ，更には結合孔３の寸法により決定
されるものである。主導波管１からの入射波はこの結合
度にて副導波管２へ結合する。The coupling degree of such a coupler depends on the waveguides 1 and 2.
Is determined by the long side a, the short side b, and the size of the coupling hole 3. The incident wave from the main waveguide 1 is coupled to the sub waveguide 2 with this coupling degree.
【０００４】この場合、所望の結合度を精度良く得るに
は、結合孔３の寸法を高精度に製作することが必要であ
り、従って製造コストが高くなり、また不経済である。In this case, in order to obtain the desired degree of coupling with high precision, it is necessary to manufacture the coupling hole 3 with high precision, which increases the manufacturing cost and is uneconomical.
【０００５】実開昭５６−８３１０６号公報には、この
種の結合器の種々の態様が示されており、図３〜図５に
その例を示している。図３，図４においては、２本の矩
形状導波管１，２の長辺または短辺を共通として管軸が
平行となるように接合し、結合孔３をほぼλg ／４（λ
g は使用周波数の管内波長）間隔である接合面に複数設
けたものである。Japanese Utility Model Laid-Open No. 56-83106 discloses various embodiments of this type of coupler, and examples thereof are shown in FIGS. In FIGS. 3 and 4, two rectangular waveguides 1 and 2 are joined so that the long sides or the short sides are common and the tube axes are parallel to each other, and the coupling hole 3 is approximately λg / 4 (λ).
A plurality of g are provided on the joint surface, which is the interval of the guide wavelength of the operating frequency).
【０００６】図５を参照すると、結合部において金属ネ
ジ１４が結合孔３の近傍の磁界（Ｈ）面に螺合して設け
られており、この金属ネジ４を挿入することにより、結
合孔３の径を大きくすることと等価となって結合度を密
に調整することができるものである。Referring to FIG. 5, a metal screw 14 is provided in the coupling portion so as to be screwed into the magnetic field (H) surface near the coupling hole 3, and by inserting the metal screw 4, the coupling hole 3 is inserted. This is equivalent to increasing the diameter of, and the degree of coupling can be finely adjusted.
【０００７】一般に、金属ネジを導波管内に挿入した場
合には、ネジ４により電波の反射が生じてＶＳＷＲ（電
圧定在波比）が悪くなるが、この図５の例では、ネジ４
を電界の弱い管壁近傍に設けているので、その反射量は
少なく、ＶＳＷＲの劣化はほとんど生じない。Generally, when a metal screw is inserted into the waveguide, the screw 4 causes reflection of radio waves and deteriorates VSWR (voltage standing wave ratio). In the example of FIG.
Is provided in the vicinity of the tube wall where the electric field is weak, the amount of reflection is small and VSWR is hardly deteriorated.
【０００８】[0008]
【発明が解決しようとする課題】図２〜図４に示した従
来の構造では、結合度を調整するには結合孔の寸法精度
を上げることが必要であり、また図５に示した従来の構
造では、ネジ４を管内に挿入することに変わりはないの
で、やはり反射によるＶＳＷＲの劣化は避けられないも
のである。In the conventional structure shown in FIGS. 2 to 4, it is necessary to increase the dimensional accuracy of the coupling hole in order to adjust the coupling degree, and the conventional structure shown in FIG. In the structure, since the screw 4 is still inserted into the tube, deterioration of VSWR due to reflection is unavoidable.
【０００９】本発明の目的は、ＶＳＷＲの劣化なく簡単
に結合度の調整を精度良く行うことができる導波管十字
型方向性結合器を提供することである。An object of the present invention is to provide a waveguide cross type directional coupler capable of easily adjusting the degree of coupling with high accuracy without deterioration of VSWR.
【００１０】[0010]
【課題を解決するための手段】本発明によれば、２つの
矩形状導波管を各広面を共通にして互いに管軸が直交す
るように接合してこの接合部で結合孔を設けた導波管十
字型方向性結合器であって、前記矩形状導波管の少なく
とも一方の前記接合部における短辺長を可変自在な短辺
長可変機構を有することを特徴とする導波管十字型方向
性結合器が得られる。According to the present invention, two rectangular waveguides are joined to each other with their wide surfaces being common so that their tube axes are orthogonal to each other, and a guiding hole is provided at this joining portion. A waveguide cross-type directional coupler having a short side length varying mechanism capable of varying a short side length of at least one of the junctions of the rectangular waveguide. A directional coupler is obtained.
【００１１】そして、前記短辺長可変機構は、前記接合
部の内壁面に設けられた弾性変形可能な板部材と、この
板部材を接合部内に突出支持する突出支持機構とを有す
ることを特徴とする。The short side length varying mechanism has an elastically deformable plate member provided on the inner wall surface of the joint, and a projecting support mechanism for projecting and supporting the plate member in the joint. And
【００１２】[0012]
【作用】２つの矩形導波管の少なくとも一方の接合部に
おける短辺長を、可変機構にて変化自在として、結合度
の調整の精度を高める。The length of the short side at the joint of at least one of the two rectangular waveguides can be changed by the variable mechanism to improve the accuracy of adjusting the coupling degree.
【００１３】[0013]
【実施例】以下、本発明の実施例について図面を用いて
説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１は本発明の実施例の断面図であり、図
１〜５と同等部分は同一符号により示している。本例に
おいては、結合度を定める矩形導波管の短辺長ｂを変化
制御することで、当該結合度を調整するようになってい
る。FIG. 1 is a sectional view of an embodiment of the present invention, in which the same parts as those in FIGS. In this example, the degree of coupling is adjusted by controlling the short side length b of the rectangular waveguide that determines the degree of coupling.
【００１５】すなわち、２つの導波管１，２の結合部分
における結合器の結合孔３と向き合う方向から、導波管
１内にネジ５を挿入し、このネジ５の先端が、導波管１
内の壁面に沿って取り付けられている弾性板６に当接し
てこれを内部に押し出すようになっている。That is, a screw 5 is inserted into the waveguide 1 from the direction facing the coupling hole 3 of the coupler in the coupling portion of the two waveguides 1 and 2, and the tip of the screw 5 is the waveguide. 1
The elastic plate 6 attached along the inner wall surface is brought into contact with and pushed out to the inside.
【００１６】このネジ５は導波管１の結合孔３と対向す
る面において、この面と螺合しており、面から外部へ露
出（導出）されたネジ頭をネジ回しによりねじ込むこと
で、弾性板６の中央部分を内部へ突出せしめ、任意の位
置で支持可能となる。The screw 5 is screwed with this surface on the surface facing the coupling hole 3 of the waveguide 1, and the screw head exposed (outgoing) from the surface is screwed in by a screwdriver. The central portion of the elastic plate 6 is projected inward so that it can be supported at any position.
【００１７】尚、この弾性板６は両端が導波管１の内壁
面のコ字状の係止部により可動自在に係止されているこ
とにより、図示の如く弾性変形可能となっている。Both ends of this elastic plate 6 are movably locked by the U-shaped locking portions on the inner wall surface of the waveguide 1, so that they can be elastically deformed as shown in the figure.
【００１８】導波管１の短辺長がｂからｂ′に縮小する
ことになり、結合度は（ｂ／ｂ′）1/2 倍に向上してよ
り密とすることができる。The short side length of the waveguide 1 is reduced from b to b ', and the degree of coupling is improved by (b / b') 1/2 times and can be made denser.
【００１９】短辺寸法が変化する部分は、テーパ状のイ
ンピーダンス変換器（トランスフォーマ）と考えること
ができるので、不連続性はなくなり、電波の反射は生じ
にくく、ＶＳＷＲの劣化はほとんどない。The portion where the dimension of the short side changes can be considered as a tapered impedance converter (transformer), so that discontinuity disappears, radio wave reflection hardly occurs, and VSWR hardly deteriorates.
【００２０】尚、導波管十字型方向性結合器の結合度Ｃ
は、結合孔１個に対して、 Ｃ＝−２０log ［（πＭ／ａ2 ｂ）・｛１／（１−ｆ2 ／ｆr 2 ）｝・ sin （２πｘ／ａ）］＋２７．３（ｔ／２ｐ）｛１− （４ｐ／λ）2 ｝1/2 （ｄＢ） …（１） と表される。The coupling degree C of the waveguide cross type directional coupler
Is C = −20log [(πM / a 2 b) · {1 / (1-f 2 / fr 2 )} · sin (2πx / a)] + 27.3 (t /) for one bond hole. 2p) {1- (4p / λ) 2 } 1/2 (dB) (1).
【００２１】ここで、ａは導波管内径の長辺，ｂはその
短辺，ｆは使用周波数，ｆr ＝ｃ／（４ｐ−１．０９２
ｑ），λ＝ｃ／ｆ（ｃ：光速），ｘは結合孔の管軸から
の距離，２ｐは結合孔の長さ，２ｑは結合孔の幅，ｔは
結合孔部分の板厚であり、Ｍは結合孔の長軸方向の磁気
双極子能率であり、 Ｍ＝（π／３）・ｐ3 ／ln（４ｐ／ｑ−１） …（２） で表される。Here, a is the long side of the inner diameter of the waveguide, b is the short side thereof, f is the operating frequency, and fr = c / (4p-1.092).
q), λ = c / f (c: speed of light), x is the distance from the tube axis of the coupling hole, 2p is the length of the coupling hole, 2q is the width of the coupling hole, and t is the plate thickness of the coupling hole portion. , M is the magnetic dipole efficiency in the long axis direction of the coupling hole, and is represented by M = (π / 3) · p 3 / ln (4p / q-1) (2).
【００２２】結合孔が２個の場合は、Ｃ′＝Ｃ−２０lo
g sin （４πｘ／λg ）−６ （ｄＢ） …（３）とな
る。When there are two coupling holes, C '= C-20lo
g sin (4πx / λg) -6 (dB) (3).
【００２３】以上の結合度に関する各式は、日刊工業新
聞社発行の「マイクロ波回路」，石井 他著，ｐ．１５
３〜１６１に開示されている。The above equations regarding the degree of coupling are described in "Microwave Circuit" published by Nikkan Kogyo Shimbun, Ishii et al., P. Fifteen
3 to 161.
【００２４】この様に、導波管の短辺寸法ｂを変えるこ
とにより結合度が変化することは（１）式より明白であ
る。そして、ネジ５を回すことで、板６の導波管矩形方
向の突出量が連続的に変えられるので、結合度が連続的
に変えることができ、容易に結合度の調整が可能とな
る。As described above, it is apparent from the equation (1) that the coupling degree changes by changing the short side dimension b of the waveguide. By turning the screw 5, the projection amount of the plate 6 in the waveguide rectangular direction can be continuously changed, so that the coupling degree can be continuously changed and the coupling degree can be easily adjusted.
【００２５】尚、導波管１のみに矩形寸法の変化機構を
設けているが、導波管２のみにも、また両方にも同様に
適用可能である。Although the rectangular dimension changing mechanism is provided only in the waveguide 1, it can be applied to the waveguide 2 alone or to both waveguides similarly.
【００２６】[0026]
【発明の効果】以上述べた如く、本発明によれば、極め
て簡単な構成で結合度を連続的に精度良く変化させるこ
とができ、またＶＳＷＲの劣化なく変化させることがで
きるという効果がある。As described above, according to the present invention, the coupling degree can be continuously and accurately changed with an extremely simple structure, and VSWR can be changed without deterioration.
【図１】本発明の実施例の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】（Ａ）は従来の導波管十字型方向性結合器の斜
視図，（Ｂ）はその断面図である。FIG. 2A is a perspective view of a conventional waveguide cross type directional coupler, and FIG. 2B is a sectional view thereof.
【図３】従来の方向性結合器の一例を示す斜視図であ
る。FIG. 3 is a perspective view showing an example of a conventional directional coupler.
【図４】従来の方向性結合器の他の例を示す斜視図であ
る。FIG. 4 is a perspective view showing another example of a conventional directional coupler.
【図５】従来の方向性結合器の更に他の例を示す斜視図
である。FIG. 5 is a perspective view showing still another example of the conventional directional coupler.
１，２ 矩形状導波管 ３ 結合孔 ５ 突出支持用ネジ ６ 弾性板部材 1, 2 Rectangular waveguide 3 Coupling hole 5 Projection supporting screw 6 Elastic plate member
Claims (3)
て互いに管軸が直交するように接合してこの接合部で結
合孔を設けた導波管十字型方向性結合器であって、前記
矩形状導波管の少なくとも一方の前記接合部における短
辺長を可変自在な短辺長可変機構を有することを特徴と
する導波管十字型方向性結合器。1. A waveguide cross type directional coupler having two rectangular waveguides joined to each other such that their wide surfaces are common to each other so that their tube axes are orthogonal to each other, and a coupling hole is provided at this joint. A waveguide cross-type directional coupler having a short side length varying mechanism capable of varying the short side length of at least one of the joining portions of the rectangular waveguide.
壁面に設けられた弾性変形可能な板部材と、この板部材
を接合部内に突出支持する突出支持機構とを有すること
を特徴とする請求項１記載の導波管十字型方向性結合
器。2. The short side length varying mechanism includes an elastically deformable plate member provided on an inner wall surface of the joint portion, and a projecting support mechanism for projecting and supporting the plate member in the joint portion. The waveguide cross-shaped directional coupler according to claim 1.
部内に突出せしめるためにこの板部材に先端が当接し他
端が前記導波管の外部に導出されて当該導波管に螺合し
たネジ部材であることを特徴とする請求項２記載の導波
管十字型方向性結合器。3. The projecting support mechanism has a tip abutting against the plate member for projecting the plate member into a joint portion, and the other end is led out of the waveguide and screwed into the waveguide. 3. The waveguide cross type directional coupler according to claim 2, wherein the directional coupler is a threaded member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14992595A JPH098512A (en) | 1995-06-16 | 1995-06-16 | Waveguide crossing type directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14992595A JPH098512A (en) | 1995-06-16 | 1995-06-16 | Waveguide crossing type directional coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH098512A true JPH098512A (en) | 1997-01-10 |
Family
ID=15485583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14992595A Withdrawn JPH098512A (en) | 1995-06-16 | 1995-06-16 | Waveguide crossing type directional coupler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH098512A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617624A (en) * | 2015-02-04 | 2015-05-13 | 衢州职业技术学院 | Solar DC voltage increase and stabilizing type charging power supply |
| WO2018203655A1 (en) * | 2017-05-02 | 2018-11-08 | 주식회사 케이엠더블유 | Cavity-type radio frequency filter |
-
1995
- 1995-06-16 JP JP14992595A patent/JPH098512A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617624A (en) * | 2015-02-04 | 2015-05-13 | 衢州职业技术学院 | Solar DC voltage increase and stabilizing type charging power supply |
| WO2018203655A1 (en) * | 2017-05-02 | 2018-11-08 | 주식회사 케이엠더블유 | Cavity-type radio frequency filter |
| CN110574222A (en) * | 2017-05-02 | 2019-12-13 | 株式会社Kmw | Cavity type radio frequency filter |
| US11108121B2 (en) | 2017-05-02 | 2021-08-31 | Kmw Inc. | Cavity-type radio frequency filter |
| CN110574222B (en) * | 2017-05-02 | 2021-11-23 | 株式会社Kmw | Cavity type radio frequency filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020903 |