JP3508040B2 - Waveguide / coaxial converter - Google Patents
Waveguide / coaxial converterInfo
- Publication number
- JP3508040B2 JP3508040B2 JP00281896A JP281896A JP3508040B2 JP 3508040 B2 JP3508040 B2 JP 3508040B2 JP 00281896 A JP00281896 A JP 00281896A JP 281896 A JP281896 A JP 281896A JP 3508040 B2 JP3508040 B2 JP 3508040B2
- Authority
- JP
- Japan
- Prior art keywords
- ridge
- waveguide
- coaxial
- coaxial converter
- mode
- 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
- Waveguide Aerials (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は導波管・同軸変換器
に関し、特にマイクロ波回路に用いられるステップ型リ
ッジを用いた導波管・同軸変換器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveguide / coaxial converter, and more particularly to a waveguide / coaxial converter using a step ridge used in a microwave circuit.
【0002】[0002]
【従来の技術】マイクロ波の伝送には、導波管路や同軸
線路が用いられる。導波管の中と同軸線路の中とではマ
イクロ波の伝搬モードが異なるため、導波管路と同軸線
路の接続部には導波管・同軸変換器が必要となる。2. Description of the Related Art A waveguide or a coaxial line is used for microwave transmission. Since the microwave propagation mode is different in the waveguide and the coaxial line, a waveguide / coaxial converter is required at the connection between the waveguide and the coaxial line.
【0003】従来の導波管・同軸変換器には、図3
(A)に示すようなアンテナ7を用いたものや、図3
(B)に示すような、ステップ状のリッジ4を用いて一
端が終端された導波管を使用したもの等がある。FIG. 3 shows a conventional waveguide / coaxial converter.
The one using the antenna 7 as shown in FIG.
As shown in (B), there is one using a waveguide whose one end is terminated by using a step-shaped ridge 4.
【0004】特に図3(B)に示したリッジで終端した
導波管を使用したものは、リッジにより徐々にインピー
ダンスを変化させて同軸線路に整合させるものであり、
アンテナタイプ等とは異なり、同軸線路を絶縁サポート
するテフロン材等が不要の(同軸線路の芯線が金属性の
リッジに直接接続される)ため耐電力面で有利であり、
主として大電力用の導波管・同軸変換器として用いられ
てきた。In particular, the waveguide using a ridge-terminated waveguide shown in FIG. 3B is one in which the impedance is gradually changed by the ridge to match the coaxial line.
Unlike the antenna type, etc., it does not require Teflon material for insulating and supporting the coaxial line (the core of the coaxial line is directly connected to the metallic ridge), which is advantageous in terms of power resistance.
It has been mainly used as a waveguide / coaxial converter for high power.
【0005】リッジ4は図3(B)に示すように、矩形
導波管の矩形断面の長辺(幅a)の中央に、導波管の端
部に向かって幅a’でステップ状に、導波管と同じ材質
の金属を盛り上げたもので、ステップの一番高いところ
(導波管の端部)に同軸線路の芯線が接続されて、同軸
線路側(図の矢印11の方向)に同軸コネクタ3を通し
て信号が取り出される。図の矢印10の方向に矩形導波
管路が接続される。As shown in FIG. 3 (B), the ridge 4 is formed in the center of the long side (width a) of the rectangular cross section of the rectangular waveguide, and has a step of width a ′ toward the end of the waveguide. , A metal of the same material as the waveguide is raised, the core of the coaxial line is connected to the highest step (end of the waveguide), and the coaxial line side (direction of arrow 11 in the figure) Then, the signal is taken out through the coaxial connector 3. A rectangular waveguide is connected in the direction of arrow 10 in the figure.
【0006】図3(B)に示すように、導波管の矩形断
面の長辺の一方にのみリッジを取り付けた場合をシング
ルリッジ、図5に示すように、対向する導波管の矩形断
面の長辺の双方にリッジを取り付けた場合をダブルリッ
ジと呼ぶ。リッジはステップ状の他、連続的に高くなっ
ていくスロープ状のものもある。As shown in FIG. 3B, a single ridge is formed when the ridge is attached to only one of the long sides of the rectangular cross section of the waveguide, and as shown in FIG. The case where ridges are attached to both long sides of is called a double ridge. In addition to the step shape, the ridge has a slope shape that continuously increases.
【0007】特開平2−35801号公報には図5に示
すように、導波管路方向(図の矢印10の方向)接続部
はダブルリッジで、同軸線路方向(図の矢印11の方
向)接続部はシングルリッジになった、スロープ状リッ
ジを用いた導波管・同軸変換器が開示されている。As shown in FIG. 5 of Japanese Unexamined Patent Publication No. 2-35801, a connecting portion is a double ridge in the waveguide direction (direction of arrow 10 in the figure) and a coaxial line direction (direction of arrow 11 in the figure). A waveguide / coaxial converter using a slope-shaped ridge in which the connecting portion is a single ridge is disclosed.
【0008】しかし、接続する装置との関係で、例えば
通常12GHz帯用に使用されるWRJ−120導波管
(19.05mm×9.525mm)を14GHz帯
(14−14.5GHz)で使用する必要が生じること
がある。この場合、最適なリッジ寸法が存在しないこと
がある。これは、リッジの寸法によって、高次モード
(TE20モード)が反射を起こし、帯域内に不要共振
が発生するためである。However, in relation to the device to be connected, for example, a WRJ-120 waveguide (19.05 mm × 9.525 mm) normally used for the 12 GHz band is used in the 14 GHz band (14-14.5 GHz). There may be a need. In this case, the optimum ridge size may not exist. This is because the higher order mode (TE20 mode) causes reflection depending on the size of the ridge, and unnecessary resonance occurs in the band.
【0009】図3(B)において、リッジ寸法に対する
WRJ−120導波管のTE20モードの共振条件は、
(b’/b)cot(πa’/λc )+B/Y0−co
t(π(a−a’)/λc)=0
ただし、λc:TE20モードの遮断波長、B/Y0:正
規化サセプタンスである。In FIG. 3B, the resonance condition of the TE20 mode of the WRJ-120 waveguide with respect to the ridge size is (b '/ b) cot (πa' / λc) + B / Y0-co.
t (π (a−a ′) / λc) = 0 where λc is the cutoff wavelength of the TE20 mode, and B / Y0 is the normalized susceptance.
【0010】この式によってTE20モードに付いて計
算した結果の一例を図4に示す。図4に示すグラフの右
縦軸は、WRJ−120導波管に付いて、λc/aに対
応する遮断周波数を求めたものである。FIG. 4 shows an example of the result calculated for the TE20 mode by this equation. The right vertical axis of the graph shown in FIG. 4 shows the cutoff frequency corresponding to λc / a for the WRJ-120 waveguide.
【0011】このグラフから判るように、リッジ寸法の
選択如何でTE20モードの遮断周波数が使用帯域に近
づき、不要共振を発生させることになる。導波管を推奨
使用周波数より高いところで使用すると、(一般に推奨
周波数が高い導波管は細いので)相対的にaの値が大き
くなる形となり、λc/aは小さくなって、TE20モ
ードの遮断周波数が高くなる。例えばa’/a=0.5
の場合、TE20モードの遮断周波数は完全に使用帯域
(14〜14.5GHz)に入ることとなる。As can be seen from this graph, the cutoff frequency of the TE20 mode approaches the used band depending on the selection of the ridge size, and unnecessary resonance is generated. When a waveguide is used at a frequency higher than the recommended operating frequency, the value of a becomes relatively large (since a waveguide with a high recommended frequency is generally thin), λc / a becomes small, and TE20 mode cutoff is achieved. The frequency becomes higher. For example, a '/ a = 0.5
In the case of, the cutoff frequency of the TE20 mode is completely within the used band (14 to 14.5 GHz).
【0012】[0012]
【発明が解決しようとする課題】図3に示すように、T
E20モードの不要共振を除去するためには、リッジの
高さb’(すなわちb’/b)あるいはリッジの幅a’
(すなわちa’/a)を変化させる必要がある。しかし
b’、a’とも基本的なリッジ型導波管・同軸変換器と
しての特性(インピーダンス整合)に関係するので、イ
ンピーダンス整合と不要共振の除去との両条件を同時に
満たすことは難しい。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As shown in FIG.
In order to eliminate unnecessary resonance in the E20 mode, the height b '(that is, b' / b) of the ridge or the width a'of the ridge is used.
(Ie a '/ a) needs to be changed. However, since both b ′ and a ′ are related to the characteristics (impedance matching) as a basic ridge type waveguide / coaxial converter, it is difficult to satisfy both the conditions of impedance matching and elimination of unnecessary resonance at the same time.
【0013】本発明の目的は、インピーダンス整合と不
要共振の除去との両条件を同時に満たしたリッジ型導波
管・同軸変換器を提供することである。An object of the present invention is to provide a ridge-type waveguide / coaxial converter which simultaneously satisfies both the conditions of impedance matching and elimination of unnecessary resonance.
【0014】[0014]
【課題を解決するための手段】本発明によるリッジを用
いた導波管・同軸変換器は、インピーダンス整合を行う
リッジと、前記リッジが設置された長辺面の内面におい
てこのリッジの両サイド部分にザグリ部あるいは***部
を含むことを特徴とする。A waveguide / coaxial converter using a ridge according to the present invention has a ridge for impedance matching and an inner surface of a long side surface on which the ridge is installed.
Te characterized in that it comprises a counterbore portion or ridges on both side parts of the ridge.
【0015】[0015]
【発明の実施の形態】本発明の作用は次の通りである。
リッジの対向する面においてリッジの両サイドにあたる
部分にザグリを設けて、導波管の高さbを等価的に広げ
る、あるいはその両サイド部分に***部を設けて、導波
管の高さbを等価的に狭める。The operation of the present invention is as follows.
Counterbore portions on opposite sides of the ridge are provided with counterbores to equivalently widen the height b of the waveguide, or ridge portions are provided on both side portions to provide the height b of the waveguide. Is narrowed equivalently.
【0016】以下に、本発明の実施例について図面を参
照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0017】図1は本発明によるリッジ型導波管・同軸
変換器の実施例の構成を示す断面図であり、(A)はザ
グリ部を持つタイプの実施例の矩形導波管の矩形断面の
長辺に平行に切った断面図、(B)は短辺に平行に切っ
た断面図であり、図3,5と同等部分は同一符号にて示
す。FIG. 1 is a sectional view showing the construction of an embodiment of a ridge type waveguide / coaxial converter according to the present invention. FIG. 1 (A) is a rectangular section of a rectangular waveguide of the embodiment having a counterbore portion. 2B is a cross-sectional view taken parallel to the long side, and FIG. 3B is a cross-sectional view taken parallel to the short side, and the same portions as those in FIGS.
【0018】図1において、本体1は基本的には導波管
2を構成し、その端部になっている。導波管路は図示の
矢印10の方向に接続され、同軸線路は同軸コネクタ3
から図示の矢印11の方向へ接続される。In FIG. 1, the main body 1 basically constitutes a waveguide 2 and is an end portion thereof. The waveguides are connected in the direction of the arrow 10 shown, and the coaxial line is the coaxial connector 3
Is connected in the direction of arrow 11 shown.
【0019】リッジ4はステップによって徐々にインピ
ーダンスを変換し、同軸線路に整合する作用を有する。
リッジ部4の幅、高さ、長さの各寸法は伝送信号周波数
に対し、最良の整合条件が得られるように設計される。The ridge 4 has the function of gradually converting the impedance in steps and matching with the coaxial line.
The width, height, and length of the ridge portion 4 are designed so as to obtain the best matching condition with respect to the transmission signal frequency.
【0020】 この場合、リッジ4が伝送信号周波数に
対し、いかに最良の整合条件が得られていても、TE2
0モードに対しても整合していることにはならない。従
ってリッジ部4の両サイド部分に、図1(A)、(B)
のようにザグリ部5を設けることにより、TE20モー
ドに対する等価的なリッジ4の高さb”を変化させて、
それぞれのステップに対するTE20モードの遮断周波
数が使用(伝送信号)周波数の近傍に入り込まないよう
にする。In this case, no matter how the ridge 4 obtains the best matching condition for the transmission signal frequency, the TE2
There is no match for the 0 mode. Therefore , on both sides of the ridge portion 4, as shown in FIGS.
By providing the counterbore 5 as described above, the height b ″ of the ridge 4 equivalent to the TE20 mode is changed,
The TE20 mode cutoff frequency for each step is kept out of the vicinity of the used (transmitted signal) frequency.
【0021】図2は本発明の他の実施例を示すもので、
(A)は***部を持つタイプの矩形導波管の矩形断面の
長辺に平行に切った断面図,(B)は短辺に平行に切っ
た断面図であり、図1と同等部分は同一符号にて示す。
リッジ部4に対向する面におけるこのリッジ部4の両サ
イド部分に***部6を設けてTE20モードに対する等
価的なリッジ4のb”を変化させている。FIG. 2 shows another embodiment of the present invention.
(A) is a cross-sectional view of the rectangular waveguide of the type having a ridge section taken parallel to the long side of the rectangular cross section, (B) is a cross-sectional view taken parallel to the short side, and the portion equivalent to FIG. The same reference numerals are used.
Protrusions 6 are provided on both side portions of the ridge portion 4 on the surface facing the ridge portion 4 to change the equivalent b ″ of the ridge 4 for the TE20 mode.
【0022】図1,2では、ザグリ部5、***部6とも
リッジ4の両側全体に設けるように描かれているが、必
要があればステップ毎に異なった深さtのザグリ5、異
なった高さt’の***6、あるいはザグリ5と***6が
共存しても良いことは言うまでもない。In FIGS. 1 and 2, the counterbore 5 and the raised portion 6 are drawn so as to be provided on both sides of the ridge 4, but if necessary, the counterbore 5 having a different depth t or different for each step. It goes without saying that the ridge 6 having the height t ′ or the counterbore 5 and the ridge 6 may coexist.
【0023】[0023]
【発明の効果】以上説明したように本発明は、リッジの
両側にザグリ部あるいは***部を設けることにより、イ
ンピーダンス整合と高次モードの除去による不要共振の
除去との両条件を同時に満たし得る効果がある。As described above, according to the present invention, by providing a counterbore or a ridge on both sides of a ridge, both conditions of impedance matching and elimination of unnecessary resonance by elimination of higher-order modes can be satisfied at the same time. There is.
【図1】本発明の一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】本発明の他の実施例の断面図である。FIG. 2 is a sectional view of another embodiment of the present invention.
【図3】従来の導波管・同軸変換器の例の断面図であ
る。FIG. 3 is a sectional view of an example of a conventional waveguide / coaxial converter.
【図4】WRJ−120導波管のTE20モードに対す
る遮断波長のグラフ。FIG. 4 is a graph of cutoff wavelength for TE20 mode of a WRJ-120 waveguide.
【図5】従来の導波管・同軸変換器の他の一例の断面図
である。FIG. 5 is a cross-sectional view of another example of a conventional waveguide / coaxial converter.
1 本体 2 導波管 3 同軸コネクタ 4 リッジ 5 ザグリ部 6 ***部 1 body 2 Waveguide 3 coaxial connector 4 ridge 5 counterbore 6 ridge
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) H01P 5/103 H01P 5/107 H01P 3/123 WPI(DIALOG)─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) H01P 5/103 H01P 5/107 H01P 3/123 WPI (DIALOG)
Claims (4)
って、インピーダンス整合を行うリッジと、前記リッジ
が設置された長辺面の内面においてこのリッジの両サイ
ド部分にザグリ部あるいは***部を含むことを特徴とす
る導波管・同軸変換器。1. A waveguide / coaxial converter using a ridge, the ridge performing impedance matching, and the ridge.
A waveguide / coaxial converter characterized by including a counterbore portion or a raised portion on both side portions of this ridge on the inner surface of the long side surface on which is installed .
テップ状に上昇することを特徴とする請求項1記載の導
波管・同軸変換器。2. The waveguide / coaxial converter according to claim 1, wherein the ridge rises stepwise toward the end of the waveguide.
ステップに接続されることを特徴とする請求項1あるい
は2記載の導波管・同軸変換器。3. A waveguide / coaxial converter according to claim 1, wherein the core of the coaxial line is connected to the highest step of the ridge.
れることを特徴とする請求項1、2あるいは3記載の導
波管・同軸変換器。4. The waveguide / coaxial converter according to claim 1, 2 or 3, wherein the connection to the coaxial line is made by a connector.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00281896A JP3508040B2 (en) | 1996-01-11 | 1996-01-11 | Waveguide / coaxial converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00281896A JP3508040B2 (en) | 1996-01-11 | 1996-01-11 | Waveguide / coaxial converter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09199913A JPH09199913A (en) | 1997-07-31 |
JP3508040B2 true JP3508040B2 (en) | 2004-03-22 |
Family
ID=11540001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP00281896A Expired - Fee Related JP3508040B2 (en) | 1996-01-11 | 1996-01-11 | Waveguide / coaxial converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3508040B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103280618A (en) * | 2013-04-22 | 2013-09-04 | 北京大华无线电仪器厂 | Connecting device for waveguide and coaxial cable |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2449825A (en) * | 2006-03-31 | 2008-12-03 | Nec Corp | Waveguide coupler |
DE602007013825D1 (en) * | 2007-11-30 | 2011-05-19 | Ericsson Telefon Ab L M | TRANSITION OF MICRO STRIPS TO WAVE LEADER |
FR2939567B1 (en) * | 2008-12-10 | 2011-01-28 | Advanten | CENTRAL MONOPOLY ANTENNA |
JP5630916B2 (en) * | 2012-01-19 | 2014-11-26 | 日本高周波株式会社 | Power combiner / distributor |
JP6407106B2 (en) * | 2015-07-06 | 2018-10-17 | 三菱電機株式会社 | Directional coupler |
CN114709582B (en) * | 2022-04-22 | 2024-06-04 | 江苏俊知技术有限公司 | Ka-band orthogonal waveguide coaxial converter with height-reducing transition and assembly method |
JP7304660B1 (en) * | 2022-11-01 | 2023-07-07 | 株式会社ニッシン | power divider combiner |
CN115966870B (en) * | 2022-12-28 | 2023-08-25 | 西安艾力特电子实业有限公司 | Coaxial rectangular waveguide conversion structure near cut-off frequency |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5650442B2 (en) * | 1973-03-26 | 1981-11-28 | ||
JPS6318170Y2 (en) * | 1981-05-25 | 1988-05-23 | ||
JPH0640601B2 (en) * | 1984-12-17 | 1994-05-25 | 日本電信電話株式会社 | Waveguide converter |
US4973925A (en) * | 1989-09-20 | 1990-11-27 | Valentine Research, Inc. | Double-ridge waveguide to microstrip coupling |
-
1996
- 1996-01-11 JP JP00281896A patent/JP3508040B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103280618A (en) * | 2013-04-22 | 2013-09-04 | 北京大华无线电仪器厂 | Connecting device for waveguide and coaxial cable |
Also Published As
Publication number | Publication date |
---|---|
JPH09199913A (en) | 1997-07-31 |
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