JPH07154101A - Low pass filter - Google Patents
Low pass filterInfo
- Publication number
- JPH07154101A JPH07154101A JP29638693A JP29638693A JPH07154101A JP H07154101 A JPH07154101 A JP H07154101A JP 29638693 A JP29638693 A JP 29638693A JP 29638693 A JP29638693 A JP 29638693A JP H07154101 A JPH07154101 A JP H07154101A
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- Prior art keywords
- pass filter
- coaxial
- low
- low pass
- section
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は低域通過ろ波器に関し、
特に広い阻止帯域を有しかつ耐電力性に優れた導波管型
低域通過ろ波器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low pass filter,
In particular, the present invention relates to a waveguide type low-pass filter having a wide stop band and excellent power resistance.
【０００２】[0002]
【従来の技術】従来、この種の導波管型低域通過ろ波器
としては、コルゲート型とワッフルアイアン型とがあ
る。コルゲート型では矩形導波管の広幅面の電波伝搬方
向に沿って、その電波伝搬方向に直交する方向に延びる
隆起部と溝部とが交互に連続して設けられている。この
種のコルゲート型の低域通過ろ波器としては、特開昭６
３−１６６３０１号公報に開示された技術がある。2. Description of the Related Art Heretofore, as a waveguide type low-pass filter of this type, there are a corrugated type and a waffle iron type. In the corrugated type, ridges and grooves extending in a direction orthogonal to the radio wave propagation direction are alternately and continuously provided along the radio wave propagation direction on the wide surface of the rectangular waveguide. A corrugated low pass filter of this type is disclosed in Japanese Patent Laid-Open No.
There is a technique disclosed in JP-A-3-166301.
【０００３】また、ワッフルアイアン型は、図６に示す
ように、矩形導波管１０の広幅面の電波伝搬方向及びこ
の電波伝搬方向に直交する方向に夫々沿って、隆起部１
１と溝部１２とが交互に連続して設けられている。Further, as shown in FIG. 6, the waffle iron type has a raised portion 1 along a radio wave propagation direction of a wide surface of a rectangular waveguide 10 and a direction orthogonal to the radio wave propagation direction.
1 and the groove part 12 are provided alternately and continuously.
【０００４】この種のワッフルアイアン型の低域通過ろ
波器としては、実開昭５７−２０２２０２号のマイクロ
フィルムや特開昭５９−１８５４０３号公報に開示され
た技術がある。As a waffle iron type low-pass filter of this type, there are the technique disclosed in Japanese Utility Model Laid-Open No. 57-202202 and Japanese Patent Laid-Open No. 59-185403.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来の導波管
型低域通過ろ波器では、矩形導波管の広幅面に隆起部と
溝部とを交互に連続して設けているので、構造が複雑と
なり、コスト高になるという問題がある。In the above-mentioned conventional waveguide type low pass filter, since the ridges and the grooves are alternately and continuously provided on the wide surface of the rectangular waveguide, the structure is However, there is a problem that it becomes complicated and the cost becomes high.
【０００６】特に、特開昭６３−１６６３０１号公報に
開示されたコルゲート型の低域通過ろ波器や特開昭５９
−１８５４０３号公報に開示されたワッフルアイアン型
の低域通過ろ波器のように隆起部の高さを２種類にした
場合や、あるいは実開昭５７−２０２２０２号のマイク
ロフィルムに開示されたワッフルアイアン型の低域通過
ろ波器のように隆起部の形状を変えた場合にはさらに構
造が複雑となる。In particular, the corrugated low-pass filter disclosed in JP-A-63-166301 and JP-A-59
Waffle iron type low pass filter disclosed in Japanese Patent No. 185403, in which the height of the ridge is two, or in the waffle disclosed in Japanese Utility Model Publication No. 57-202202. The structure becomes more complicated when the shape of the ridge is changed like an iron type low-pass filter.
【０００７】また、低域通過ろ波器を構成する導波管内
の隆起部と溝部とにおける上下の一致度、つまり加工精
度がわずかでも悪いと、図７に示すように、阻止帯域内
に共振が生じ、スプリアス特性が悪くなるという問題が
ある。Further, if the up-and-down degree of coincidence between the raised portion and the groove portion in the waveguide forming the low-pass filter, that is, the processing accuracy is slightly poor, resonance occurs in the stop band as shown in FIG. Occurs, and the spurious characteristics deteriorate.
【０００８】さらに、広い阻止帯域を実現するために
は、低域通過ろ波器を構成する導波管内の隆起部におけ
る上下の間隔を非常に狭くする必要があるが、この間隔
を狭くすると高電力用には適さなくなるという問題があ
る。Further, in order to realize a wide stop band, it is necessary to make the upper and lower intervals in the ridges in the waveguide forming the low-pass filter very narrow. There is a problem that it is not suitable for electric power.
【０００９】さらにまた、低域通過ろ波器を構成する導
波管内の隆起部及び溝部の寸法によって周波数特性が決
定されるため、異なった特性が要求される場合には隆起
部及び溝部の寸法をその特性に応じて変更しなければな
らないが、それら隆起部及び溝部とからなる矩形導波管
の構造が複雑であるので、容易に変更することが難し
い。Furthermore, since the frequency characteristics are determined by the dimensions of the ridges and grooves in the waveguide forming the low-pass filter, the dimensions of the ridges and grooves are required when different characteristics are required. Must be changed according to its characteristics, but it is difficult to change easily because the structure of the rectangular waveguide including the ridge and the groove is complicated.
【００１０】そこで、本発明の目的は上記の問題点を解
消し、構造を簡単にすることができ、広い阻止帯域を有
しかつ耐電力性及び汎用性に優れた低域通過ろ波器を提
供することにある。Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a low-pass filter which has a simple structure, has a wide stop band, and is excellent in power resistance and versatility. To provide.
【００１１】[0011]
【課題を解決するための手段】本発明による低域通過ろ
波器は、矩形導波管からなる低域通過ろ波器であって、
前記矩形導波管内に設けられかつ高周波成分を除去する
同軸低域通過ろ波器と、前記矩形導波管内に設けられか
つ前記同軸低域通過ろ波器への入出力信号のモードを変
換する同軸導波管変換器とを備えている。A low pass filter according to the present invention is a low pass filter comprising a rectangular waveguide,
A coaxial low-pass filter provided in the rectangular waveguide and removing high frequency components, and a mode of an input / output signal to / from the coaxial low-pass filter provided in the rectangular waveguide. And a coaxial waveguide converter.
【００１２】本発明による他の低域通過ろ波器は、上記
の構成のほかに、前記同軸低域通過ろ波器と前記同軸導
波管変換器との結合部分に設けられかつ前記同軸低域通
過ろ波器における高次モードの信号の発生を抑止するリ
ング部材を備えている。In addition to the above structure, another low-pass filter according to the present invention is provided at a coupling portion between the coaxial low-pass filter and the coaxial waveguide converter and has the coaxial low-pass filter. A ring member for suppressing generation of higher-order mode signals in the pass filter is provided.
【００１３】[0013]
【実施例】次に、本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【００１４】図１は本発明の一実施例を示す構成図であ
る。図において、低域通過ろ波器１は同軸低域通過ろ波
器部２と、矩形導波管部５ａ，５ｂと、同軸導波管変換
器部７ａ，７ｂとから構成されている。FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, a low-pass filter 1 comprises a coaxial low-pass filter section 2, rectangular waveguide sections 5a and 5b, and coaxial waveguide converter sections 7a and 7b.
【００１５】同軸低域通過ろ波器部２は外導体３と、軸
径が細い軸径部分４ａと軸径が太い軸径部分４ｂとがあ
る間隔で夫々複数個ずつ設けられた中心導体４とから構
成されている。ここで、中心導体４は矩形導波管部５
ａ，５ｂに夫々設けられたプローブ６ａ，６ｂに接着固
定されている。The coaxial low-pass filter section 2 includes a plurality of outer conductors 3, a central shaft portion 4a having a small shaft diameter and a central shaft portion 4b having a large shaft diameter, and a plurality of central conductors 4 provided at intervals. It consists of and. Here, the central conductor 4 is the rectangular waveguide portion 5
It is adhered and fixed to probes 6a and 6b provided on a and 5b, respectively.
【００１６】矩形導波管部５ａ，５ｂの一端には短絡面
が設けられており、また広幅面の中心にはプローブ６
ａ，６ｂが設けられている。尚、プローブ６ａ，６ｂは
中心導体４との結合部に発生する熱を矩形導波管部５
ａ，５ｂのケースに逃がす働きをする。A short circuit surface is provided at one end of each of the rectangular waveguide portions 5a and 5b, and the probe 6 is provided at the center of the wide surface.
a and 6b are provided. It should be noted that the probes 6a and 6b apply heat generated at the joint with the central conductor 4 to the rectangular waveguide section 5.
It works to escape to the cases of a and 5b.
【００１７】同軸導波管変換器部７ａ，７ｂは同軸低域
通過ろ波器部２と矩形導波管部５ａ，５ｂとの結合部
分、つまり同軸低域通過ろ波器部２の両端に夫々設けら
れ、中心導体４と矩形導波管部５ａ，５ｂとプローブ６
ａ，６ｂとによって形成されている。The coaxial waveguide converter portions 7a and 7b are connected to the coaxial low-pass filter portion 2 and the rectangular waveguide portions 5a and 5b, that is, at both ends of the coaxial low-pass filter portion 2. The central conductor 4, the rectangular waveguide portions 5a and 5b, and the probe 6 are provided respectively.
It is formed by a and 6b.
【００１８】低域通過ろ波器１に信号が伝搬されてくる
と、その信号は矩形導波管部５ａを介して同軸導波管変
換器部７ａに伝搬される。同軸導波管変換器部７ａでは
矩形導波管部５ａを伝搬される信号のモードを同軸低域
通過ろ波器部２に入力される信号のモードに変換する。When a signal is propagated to the low pass filter 1, the signal is propagated to the coaxial waveguide converter portion 7a via the rectangular waveguide portion 5a. The coaxial waveguide converter unit 7a converts the mode of the signal propagated through the rectangular waveguide unit 5a into the mode of the signal input to the coaxial low-pass filter unit 2.
【００１９】同軸低域通過ろ波器部２は同軸導波管変換
器部７ａでモードが変換された信号が伝搬されてくる
と、その高周波成分を切って同軸導波管変換器部７ｂに
出力する。同軸導波管変換器部７ｂでは同軸低域通過ろ
波器部２から出力される信号のモードを、矩形導波管部
５ｂで伝搬される信号のモードに変換する。When the signal whose mode has been converted by the coaxial waveguide converter portion 7a is propagated to the coaxial low-pass filter portion 2, the high-frequency component is cut off to the coaxial waveguide converter portion 7b. Output. The coaxial waveguide converter unit 7b converts the mode of the signal output from the coaxial low-pass filter unit 2 into the mode of the signal propagated by the rectangular waveguide unit 5b.
【００２０】図２は図１の低域通過ろ波器１における周
波数と減衰量との関係を示す図である。図においては、
低域通過ろ波器１を通常の電力用に形成した場合の周波
数と減衰量との関係を示している。FIG. 2 is a diagram showing the relationship between the frequency and the amount of attenuation in the low pass filter 1 of FIG. In the figure,
The relationship between the frequency and the attenuation when the low-pass filter 1 is formed for normal power is shown.
【００２１】この図２に示すように、低域通過ろ波器１
においては阻止帯域が通過周波数の３倍以上であって
も、その阻止帯域では図６に示す従来例のように阻止帯
域内に共振が生じることはなく、スプリアス特性が悪く
なることない。As shown in FIG. 2, the low-pass filter 1
In the above, even if the stop band is 3 times or more of the pass frequency, resonance does not occur in the stop band in the stop band as in the conventional example shown in FIG. 6, and the spurious characteristic does not deteriorate.
【００２２】よって、低域通過ろ波器１を高電力用に設
計することで、広い阻止帯域を有しかつ耐電力性に優れ
た低域通過ろ波器とすることができる。この場合、上述
の如く、構造が極めて単純であるため、低コスト化する
ことができる。Therefore, by designing the low-pass filter 1 for high power, it is possible to obtain a low-pass filter having a wide stop band and excellent power resistance. In this case, since the structure is extremely simple as described above, the cost can be reduced.
【００２３】また、阻止帯域は同軸線路の寸法によって
任意に選択することができる。また、同軸線路の寸法の
変更は中心導体４のみの交換で行えるため、汎用性に優
れた低域通過ろ波器を実現することができる。The stop band can be arbitrarily selected depending on the size of the coaxial line. Further, since the size of the coaxial line can be changed by exchanging only the center conductor 4, it is possible to realize a low-pass filter having excellent versatility.
【００２４】図３は図１の低域通過ろ波器１における周
波数と減衰量との関係を示す図である。図においては、
低域通過ろ波器１を高電力用に形成した場合の周波数と
減衰量との関係を示している。FIG. 3 is a diagram showing the relationship between the frequency and the amount of attenuation in the low pass filter 1 of FIG. In the figure,
The relationship between the frequency and the attenuation when the low pass filter 1 is formed for high power is shown.
【００２５】この図３に示すように、低域通過ろ波器１
においては高電力用に形成した場合、同軸低域通過ろ波
器部２の両端の径を大きくする必要がある。そのため、
阻止帯域が通過帯域の２倍程度であれば、図７に示す従
来例のように阻止帯域内に共振が生じることはなく、ス
プリアス特性が悪くなることもない。As shown in FIG. 3, the low-pass filter 1
In the case of (1), when formed for high power, it is necessary to increase the diameter of both ends of the coaxial low-pass filter section 2. for that reason,
When the stop band is about twice the pass band, resonance does not occur in the stop band and the spurious characteristics do not deteriorate unlike the conventional example shown in FIG.
【００２６】しかしながら、上記の低域通過ろ波器１で
は阻止帯域が通過帯域の３倍以上になると、図３に示す
ように、阻止帯域内に共振が生じ、スプリアス特性が悪
くなる。このスプリアス特性が悪くなる原因としては、
同軸低域通過炉波器部２が高電力用に形成されているた
めに生ずる高次モードの発生がある。However, in the low pass filter 1 described above, when the stop band is three times or more of the pass band, resonance occurs in the stop band as shown in FIG. 3 and the spurious characteristics deteriorate. The causes of the spurious characteristics are:
Since the coaxial low-pass reactor wave section 2 is formed for high power, there is generation of a higher mode.
【００２７】同軸線路中はＴＥＭ波であり、最初の高次
モードはＴＥ11モードである。このＴＥ11モードの発生
する周波数ｆは外導体３の半径をａとし、中心導体４の
半径をｂとすると、 ｆ＝３００／π（ａ＋ｂ） という式で表される。The coaxial line is a TEM wave, and the first higher order mode is the TE 11 mode. When the radius of the outer conductor 3 is a and the radius of the central conductor 4 is b, the frequency f of the TE 11 mode is expressed by the following formula: f = 300 / π (a + b)
【００２８】このＴＥ11モードの発生を抑圧すること
で、さらに広い阻止帯域を実現することができる。By suppressing the occurrence of the TE 11 mode, a wider stop band can be realized.
【００２９】図４は本発明の他の実施例を示す構成図で
ある。図において、本発明の他の実施例による低域通過
ろ波器８は同軸低域通過ろ波器部２と同軸導波管変換器
部７ａ，７ｂとの結合部分にリング部材９ａ，９ｂを設
けた以外は図１に示す本発明の一実施例と同様の構成と
なっており、同一構成要素には同一符号を付してある。
また、それら同一構成要素の動作は本発明の一実施例と
同様である。FIG. 4 is a block diagram showing another embodiment of the present invention. In the figure, a low-pass filter 8 according to another embodiment of the present invention includes ring members 9a and 9b at the coupling portion between the coaxial low-pass filter unit 2 and the coaxial waveguide converter units 7a and 7b. The configuration is the same as that of the embodiment of the present invention shown in FIG. 1 except that it is provided, and the same reference numerals are given to the same components.
The operation of those same constituent elements is similar to that of the embodiment of the present invention.
【００３０】低域通過ろ波器８では同軸低域通過ろ波器
部２と同軸導波管変換器部７ａ，７ｂとの結合部分にリ
ング部材９ａ，９ｂを取付けることによって、同軸低域
通過ろ波器部２でのＴＥ11モードの発生を抑圧するよう
にしている。In the low-pass filter 8, the coaxial low-pass filter is attached to the coupling portion between the coaxial low-pass filter section 2 and the coaxial waveguide converter sections 7a and 7b. The generation of the TE 11 mode in the filter unit 2 is suppressed.
【００３１】図５は図１の低域通過ろ波器８における周
波数と減衰量との関係を示す図である。図においては、
低域通過ろ波器８を高電力用に形成した場合の周波数と
減衰量との関係を示している。FIG. 5 is a diagram showing the relationship between frequency and attenuation in the low pass filter 8 of FIG. In the figure,
The relationship between the frequency and the attenuation amount when the low-pass filter 8 is formed for high power is shown.
【００３２】この図に示すように、低域通過ろ波器８に
おいては同軸低域通過ろ波器部２を高電力用に形成した
場合、通過帯域の３倍以上の阻止帯域、つまり通過帯域
が５８５０〜６４２５ＭＨｚであれば１７．４７５〜１
９．３５ＧＨｚの阻止帯域において、図７に示す従来例
や図３に示す本発明の一実施例のように阻止帯域内に共
振が生じることはなく、スプリアス特性が悪くなること
はない。As shown in this figure, in the low-pass filter 8, when the coaxial low-pass filter section 2 is formed for high power, the stop band which is three times or more of the pass band, that is, the pass band is used. Is 5.850-6425 MHz, 17.475-1
In the stop band of 9.35 GHz, resonance does not occur in the stop band as in the conventional example shown in FIG. 7 and the embodiment of the present invention shown in FIG. 3, and spurious characteristics do not deteriorate.
【００３３】これはリング部材９ａ，９ｂによって同軸
低域通過ろ波器部２でのＴＥ11モードの発生を抑圧して
いるので、同軸低域通過ろ波器部２を高電力用に形成し
ても阻止帯域内に共振が生じることがないためである。Since the ring members 9a and 9b suppress the occurrence of the TE 11 mode in the coaxial low pass filter section 2, the coaxial low pass filter section 2 is formed for high power. However, resonance does not occur in the stop band.
【００３４】よって、低域通過ろ波器８を高電力用に設
計することで、広い阻止帯域を有しかつ耐電力性に優れ
た低域通過ろ波器とすることができる。この場合、上述
の如く、構造が極めて単純であるため、低コスト化する
ことができる。Therefore, by designing the low-pass filter 8 for high power, a low-pass filter having a wide stop band and excellent in power resistance can be obtained. In this case, since the structure is extremely simple as described above, the cost can be reduced.
【００３５】また、阻止帯域は同軸線路の寸法によって
任意に選択することができる。また、同軸線路の寸法の
変更は中心導体４のみの交換で行えるため、汎用性に優
れた低域通過ろ波器を実現することができる。The stop band can be arbitrarily selected depending on the size of the coaxial line. Further, since the size of the coaxial line can be changed by exchanging only the center conductor 4, it is possible to realize a low-pass filter having excellent versatility.
【００３６】しかも、低域通過ろ波器８では阻止帯域が
通過帯域の３倍以上になっても、リング部材９ａ，９ｂ
によって同軸低域通過ろ波器部２でのＴＥ11モードの発
生が抑圧されるので、阻止帯域内に共振が生じることは
なく、スプリアス特性が悪くなることもない。Moreover, in the low-pass filter 8, even if the stop band is three times the pass band or more, the ring members 9a, 9b
Since the TE 11 mode is suppressed from being generated in the coaxial low-pass filter section 2, resonance does not occur in the stop band and spurious characteristics do not deteriorate.
【００３７】このように、低域通過ろ波器１に伝搬され
てきた信号を同軸導波管変換器部７ａで矩形導波管部５
ａを伝搬される信号のモードを同軸低域通過ろ波器部２
に入力される信号のモードに変換し、このモードが変換
された信号の高周波成分を同軸低域通過ろ波器部２で切
って同軸導波管変換器部７ｂに出力して矩形導波管部５
ｂで伝搬される信号のモードに変換することによって、
構造を簡単にすることができ、広い阻止帯域を有しかつ
耐電力性及び汎用性に優れた低域通過ろ波器を提供する
ことができる。In this way, the signal propagated to the low pass filter 1 is guided by the coaxial waveguide converter section 7a to the rectangular waveguide section 5a.
The mode of the signal propagated through a is the coaxial low-pass filter unit 2
To the coaxial waveguide converter unit 7b by converting the high-frequency component of the signal converted into the mode into a mode of the signal input to the coaxial waveguide low-pass filter unit 2 and outputting it to the coaxial waveguide converter unit 7b. Part 5
By converting to the mode of the signal propagated in b,
It is possible to provide a low-pass filter having a simple structure, a wide stop band, and excellent power resistance and versatility.
【００３８】また、同軸低域通過ろ波器部２と同軸導波
管変換器部７ａ，７ｂとの結合部分に取付けたリング部
材９ａ，９ｂで同軸低域通過ろ波器部２でのＴＥ11モー
ドの発生を抑圧することによって、通過帯域の３倍以上
の阻止帯域で共振が発生するのを防止することができ、
スプリアス特性の悪化を防止することができる。Further, the ring member 9a, 9b attached to the coupling portion between the coaxial low-pass filter unit 2 and the coaxial waveguide converter units 7a, 7b is used to connect the coaxial low-pass filter unit 2 to the TE. By suppressing the generation of 11 modes, it is possible to prevent resonance from occurring in the stop band which is three times as large as the pass band,
It is possible to prevent deterioration of spurious characteristics.
【００３９】[0039]
【発明の効果】以上説明したように本発明の低域通過ろ
波器によれば、矩形導波管内に高周波成分を除去する同
軸低域通過ろ波器と、同軸低域通過ろ波器への入出力信
号のモードを変換する同軸導波管変換器とを備えること
によって、構造を簡単にすることができ、広い阻止帯域
を有しかつ耐電力性及び汎用性に優れた低域通過ろ波器
を提供することができるという効果がある。As described above, according to the low pass filter of the present invention, a coaxial low pass filter for removing high frequency components in a rectangular waveguide and a coaxial low pass filter are provided. And a coaxial waveguide converter for converting the mode of the input / output signal of the above, the structure can be simplified and the low pass filter has a wide stop band and is excellent in power resistance and versatility. There is an effect that a wave instrument can be provided.
【００４０】また、本発明の他の低域通過ろ波器によれ
ば、同軸低域通過ろ波器と同軸導波管変換器との結合部
分に、同軸低域通過ろ波器における高次モードの信号の
発生を抑止するリング部材を備えることによって、構造
を簡単にすることができ、通過帯域の３倍以上の広い阻
止帯域を有しかつ耐電力性及び汎用性に優れた低域通過
ろ波器を提供するという効果がある。Further, according to another low-pass filter of the present invention, a high-order filter in the coaxial low-pass filter is provided at a coupling portion between the coaxial low-pass filter and the coaxial waveguide converter. By providing a ring member that suppresses the generation of mode signals, the structure can be simplified, and the low pass band has a wide stop band that is three times the pass band or more and is excellent in power resistance and versatility. The effect is to provide a filter.
【図１】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】図１の低域通過ろ波器における周波数と減衰量
との関係を示す図である。FIG. 2 is a diagram showing a relationship between a frequency and an attenuation amount in the low pass filter shown in FIG.
【図３】図１の低域通過ろ波器における周波数と減衰量
の関係を示す図である。FIG. 3 is a diagram showing the relationship between frequency and attenuation in the low pass filter shown in FIG.
【図４】本発明の他の実施例を示す構成図である。FIG. 4 is a configuration diagram showing another embodiment of the present invention.
【図５】図４の低域通過ろ波器における周波数と減衰量
との関係を示す図である。5 is a diagram showing a relationship between a frequency and an attenuation amount in the low pass filter of FIG.
【図６】従来例を示す構成図である。FIG. 6 is a configuration diagram showing a conventional example.
【図７】図６の低域通過ろ波器における周波数と減衰量
との関係を示す図である。7 is a diagram showing the relationship between frequency and attenuation in the low pass filter of FIG.
１，８ 低域通過ろ波器 ２ 同軸低域通過ろ波器部 ３ 外導体 ４ 中心導体 ４ａ 細い軸径部分 ４ｂ 太い軸径部分 ５ａ，５ｂ 矩形導波管 ６ａ，６ｂ プローブ ７ａ，７ｂ 同軸導波管変換器部 ９ａ，９ｂ リング部材 1,8 low-pass filter 2 coaxial low-pass filter 3 outer conductor 4 center conductor 4a thin shaft diameter part 4b thick shaft diameter part 5a, 5b rectangular waveguide 6a, 6b probe 7a, 7b coaxial conductor Wave tube converter section 9a, 9b Ring member
Claims (5)
って、前記矩形導波管内に設けられかつ高周波成分を除
去する同軸低域通過ろ波器と、前記矩形導波管内に設け
られかつ前記同軸低域通過ろ波器への入出力信号のモー
ドを変換する同軸導波管変換器とを含むことを特徴とす
る低域通過ろ波器。1. A low-pass filter comprising a rectangular waveguide, wherein the coaxial low-pass filter is provided in the rectangular waveguide and removes high-frequency components, and in the rectangular waveguide. And a coaxial waveguide converter provided for converting a mode of an input / output signal to / from the coaxial low-pass filter.
管変換器との結合部分に設けられかつ前記同軸低域通過
ろ波器における高次モードの信号の発生を抑止するリン
グ部材を有することを特徴とする請求項１記載の低域通
過ろ波器。2. A ring member which is provided at a coupling portion between the coaxial low pass filter and the coaxial waveguide converter and which suppresses generation of a higher-order mode signal in the coaxial low pass filter. The low-pass filter according to claim 1, further comprising:
る少なくとも２種類の軸径部分を含む中心導体と、前記
中心導体との間に間隙をもって前記中心導体の外周部分
に周設された外導体とから構成されたことを特徴とする
請求項１または請求項２記載の低域通過ろ波器。3. The coaxial low-pass filter is provided around an outer peripheral portion of the center conductor with a gap between the center conductor and at least two types of shaft diameter portions different from each other. The low pass filter according to claim 1 or 2, wherein the low pass filter comprises an outer conductor.
形成されたことを特徴とする請求項１から請求項３のい
ずれか記載の低域通過ろ波器。4. The low pass filter according to claim 1, wherein the coaxial low pass filter is formed for high power.
低域通過ろ波器を構成する外導体の内径よりも小さいこ
とを特徴とする請求項１から請求項４のいずれか記載の
低域通過ろ波器。5. The low band according to claim 1, wherein the ring member has an inner diameter smaller than an inner diameter of an outer conductor forming the coaxial low pass filter. Passing filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5296386A JP2722166B2 (en) | 1993-11-26 | 1993-11-26 | Low-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5296386A JP2722166B2 (en) | 1993-11-26 | 1993-11-26 | Low-pass filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07154101A true JPH07154101A (en) | 1995-06-16 |
| JP2722166B2 JP2722166B2 (en) | 1998-03-04 |
Family
ID=17832881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5296386A Expired - Lifetime JP2722166B2 (en) | 1993-11-26 | 1993-11-26 | Low-pass filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2722166B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005104293A1 (en) * | 2004-04-21 | 2005-11-03 | Matsushita Electric Industrial Co., Ltd. | Photonic crystal device |
| WO2012101699A1 (en) * | 2011-01-25 | 2012-08-02 | 日本電気株式会社 | Coaxial waveguide tube converter, and ridge waveguide tube |
| CN104617362A (en) * | 2015-01-30 | 2015-05-13 | 东莞鸿爱斯通信科技有限公司 | Low-pass filter with transmission zero |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119607U (en) * | 1983-01-31 | 1984-08-13 | 富士通株式会社 | Coaxial waveguide conversion structure |
| JPH01107204U (en) * | 1988-01-12 | 1989-07-19 |
-
1993
- 1993-11-26 JP JP5296386A patent/JP2722166B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119607U (en) * | 1983-01-31 | 1984-08-13 | 富士通株式会社 | Coaxial waveguide conversion structure |
| JPH01107204U (en) * | 1988-01-12 | 1989-07-19 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005104293A1 (en) * | 2004-04-21 | 2005-11-03 | Matsushita Electric Industrial Co., Ltd. | Photonic crystal device |
| US7280736B2 (en) | 2004-04-21 | 2007-10-09 | Matsushita Electric Industrial Co., Ltd. | Photonic crystal device |
| US7574098B2 (en) | 2004-04-21 | 2009-08-11 | Panasonic Corporation | Photonic crystal device |
| US7764861B2 (en) | 2004-04-21 | 2010-07-27 | Panasonic Corporation | Photonic crystal device |
| WO2012101699A1 (en) * | 2011-01-25 | 2012-08-02 | 日本電気株式会社 | Coaxial waveguide tube converter, and ridge waveguide tube |
| US9118098B2 (en) | 2011-01-25 | 2015-08-25 | Nec Corporation | Coaxial waveguide converter and ridge waveguide |
| CN104617362A (en) * | 2015-01-30 | 2015-05-13 | 东莞鸿爱斯通信科技有限公司 | Low-pass filter with transmission zero |
| CN104617362B (en) * | 2015-01-30 | 2017-11-28 | 东莞鸿爱斯通信科技有限公司 | Low pass filter with transmission zero |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2722166B2 (en) | 1998-03-04 |
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