JPH0831722B2 - Bandpass filter - Google Patents
Bandpass filterInfo
- Publication number
- JPH0831722B2 JPH0831722B2 JP61302578A JP30257886A JPH0831722B2 JP H0831722 B2 JPH0831722 B2 JP H0831722B2 JP 61302578 A JP61302578 A JP 61302578A JP 30257886 A JP30257886 A JP 30257886A JP H0831722 B2 JPH0831722 B2 JP H0831722B2
- Authority
- JP
- Japan
- Prior art keywords
- input
- cavity resonator
- bandpass filter
- output
- coupling hole
- 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
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は主としてマイクロ波帯及びミリ波帯で使用
される導波管形空胴共振器を用いた帯域通過フィルタに
関するものである。Description: TECHNICAL FIELD The present invention relates to a bandpass filter using a waveguide type cavity resonator mainly used in a microwave band and a millimeter wave band.
［従来の技術］ 第６図は例えば、IEEE TRANSACTIONS ON MICROWAVE T
HEORY AND TECHNIQUES vol.MTT−18,No.12,pp1109−111
3（DECEMBER,1970）に示された従来の帯域通過フィルタ
を示す概略構成図であり、図において（1a）（1b）はTE
111モードで共振する円筒形空胴共振器、（2a）（2b）
は入出力方形導波管、（3a）（3b）は入出力結合孔、
（４）は十字形結合孔、（5a）（5b）は直交するモード
間の結合量調整ネジ、（６）は周波数調整ネジである。
入出力結合孔（3a）（3b）及び十字形結合孔（４）はそ
れぞれ円筒形空胴共振器（1a）（1b）の両端面に設けら
れている。周波数調整ネジ（６）は円筒形空胴共振器
（1a）（1b）内の直交する２つのモード電界に平行に設
けられ、結合量調整ネジ（5a）（5b）は直交する２つの
モードの電界と45度の角度をなすように設けられてい
る。また、図中、矢印は円筒形空胴共振器（1a）（1b）
及び入出力方形導波管（2a）（2b）内の直交する２つの
モードの電界の方向を示している。[Prior Art] FIG. 6 shows, for example, IEEE TRANSACTIONS ON MICROWAVE T.
HEORY AND TECHNIQUES vol.MTT-18, No.12, pp1109-111
3 (DECEMBER, 1970) is a schematic configuration diagram showing a conventional bandpass filter, where (1a) and (1b) are TEs.
Cylindrical cavity resonator that resonates in 111 mode, (2a) (2b)
Is an input / output rectangular waveguide, (3a) and (3b) are input / output coupling holes,
(4) is a cross-shaped coupling hole, (5a) and (5b) are coupling amount adjusting screws between orthogonal modes, and (6) is a frequency adjusting screw.
The input / output coupling holes (3a) (3b) and the cross coupling hole (4) are provided on both end faces of the cylindrical cavity resonators (1a) (1b), respectively. The frequency adjusting screw (6) is provided parallel to the electric fields of two orthogonal modes in the cylindrical cavity resonator (1a) (1b), and the coupling amount adjusting screws (5a) (5b) are of two orthogonal modes. It is provided to form an angle of 45 degrees with the electric field. Also, in the figure, the arrows indicate cylindrical cavity resonators (1a) (1b).
And the directions of electric fields of two orthogonal modes in the input / output rectangular waveguides (2a) and (2b).
次に動作について説明する。入出力方形導波管（2a）
から入射した幅の広い面に垂直な電界ＥをもつTE10モー
ド波は、入出力結合孔（3a）を介して円筒形空胴共振器
（1a）内に電界Ａを有するTE111モード波と結合する。
この電界Ａを有するTE111モード波は45度の角度をなし
て設けられた結合量調整ネジ（5a）の効果により、直交
する電界Ｂを有するTE111モード波と結合する。さら
に、十字形結合孔（４）を介して直交する電界A,Bを有
するTE111モード波は、それぞれ隣接する円筒形空胴共
振器（1b）内の直交する電界D,Cを有するTE111モード波
と結合し、電界Ｄを有するTE111モード波は入出力結合
孔（3b）を介して入出力方形導波管（2b）の電界Ｆをも
つTE10モード波と結合し、出力として取り出される。円
筒形空胴共振器（1a）（1b）内の直交するモードが周波
数調整ネジ（６）によって全て同一周波数f0で共振する
ように調整されていると前述のように入出力方形導波管
（2a）への入射波は入出力方形導波管（2b）に取り出さ
れる。しかしf0以外の周波数では共振器が共振しないた
め入出力方形導波管（2a）への入射波はほとんど反射さ
れ、入出力方形導波管（2b）へは出力されない。このよ
うに、第６図に示す従来のフィルタは帯域通過フィルタ
として動作し、かつ隣接する円筒形空胴共振器（1a）
（1b）内の電界ＡとＤが逆の極性を有しているため、第
７図に示すような通過域近傍に減衰極をもつ急峻な減衰
特性を示す。また、１つの空胴共振器内の直交する２つ
のモードを使用しているため物理的には２個の空胴共振
器で４段フィルタとして動作するため小形である。Next, the operation will be described. Input / output rectangular waveguide (2a)
A TE 10 mode wave having an electric field E perpendicular to a wide surface incident from is coupled with a TE 111 mode wave having an electric field A in the cylindrical cavity resonator (1a) through the input / output coupling hole (3a). Join.
The TE 111 mode wave having the electric field A is coupled with the TE 111 mode wave having the orthogonal electric field B by the effect of the coupling amount adjusting screw (5a) provided at an angle of 45 degrees. Further, TE 111 TE 111 mode waves having a field A, B perpendicular through the cross coupling hole (4) having respectively orthogonal field D in adjacent cylindrical cavity resonator (1b), a C The TE 111 mode wave coupled with the mode wave and having the electric field D is coupled with the TE 10 mode wave having the electric field F of the input / output rectangular waveguide (2b) through the input / output coupling hole (3b) and extracted as an output. Be done. If the orthogonal modes in the cylindrical cavity resonators (1a) and (1b) are adjusted by the frequency adjusting screw (6) so that they all resonate at the same frequency f 0 , as described above, the input / output rectangular waveguide The incident wave on (2a) is extracted to the input / output rectangular waveguide (2b). However, since the resonator does not resonate at frequencies other than f 0 , most of the incident wave on the input / output rectangular waveguide (2a) is reflected and is not output to the input / output rectangular waveguide (2b). As described above, the conventional filter shown in FIG. 6 operates as a bandpass filter, and is adjacent to the cylindrical cavity resonator (1a).
Since the electric fields A and D in (1b) have opposite polarities, a steep attenuation characteristic having an attenuation pole near the pass band as shown in FIG. 7 is exhibited. Further, since two modes that are orthogonal to each other in one cavity resonator are used, it is physically small in size because two cavity resonators operate as a four-stage filter.
このフィルタにおいて、結合孔による入出力方形導波
管（2a）（2b）と円筒形空胴共振器（1a）（1b）の結合
Qe（外部Ｑ）及び円筒形空胴共振器（1a）（1b）間の結
合ｋ（段間結合量）は次式で表わされる。In this filter, the coupling of the input / output rectangular waveguides (2a) (2b) and the cylindrical cavity resonators (1a) (1b) by the coupling holes
The coupling k (inter-stage coupling amount) between Qe (external Q) and the cylindrical cavity resonators (1a) (1b) is expressed by the following equation.
ただし、ｈは入出力方形導波管（2a）（2b）の横断面
内の磁界成分、Ｈは円筒形空胴（1a）（1b）の横断面内
の共振磁界成分、λｇは入出力方形導波管（2a）（2b）
の管内波長、μは透磁率、Mtは結合孔の周波数特性を考
慮した磁気偏極率である。Mtは結合孔の厚さを無視した
場合次式で表わされる。 Where h is the magnetic field component in the cross section of the input / output rectangular waveguide (2a) (2b), H is the resonant magnetic field component in the cross section of the cylindrical cavity (1a) (1b), and λg is the input / output square. Waveguide (2a) (2b)
Is the wavelength inside the tube, μ is the magnetic permeability, and Mt is the magnetic polarization that considers the frequency characteristics of the coupling hole. Mt is expressed by the following equation when the thickness of the coupling hole is ignored.
ここで、M0は結合孔の周波数特性を考慮しない磁気偏
極率、ｌは結合孔の長さ、λは自由空間中の波長であ
る。ｌは通常λ/2より小さい寸法とする。また、空胴共
振器内の共振電磁界は、この空胴共振器内のエネルギー
の時間平均値が１となるように規格化されたものであ
る。 Here, M 0 is the magnetic polarization without considering the frequency characteristics of the coupling hole, l is the length of the coupling hole, and λ is the wavelength in free space. l is usually smaller than λ / 2. Further, the resonance electromagnetic field in the cavity resonator is standardized so that the time average value of the energy in the cavity resonator becomes 1.
［発明が解決しようとする問題点］ 以上のように構成された従来の帯域通過フィルタは、
広帯域な特性を得るためには結合孔の長さを長くする必
要があった。結合孔の長さを長くすると2lが共振周波数
f0における自由空間波長λ０に近づくため磁気偏極率の
周波数に対する変化率が大きくなる。第８図はMt/M0と
λ／λ０の関係を2l/λ０をパラメータにして示したも
ので、例えばλ／λ０＝１においてｌが大きくなる程Mt
/M0のλ／λ０に対する傾きが大きくなっていることが
わかる。このため、周波数変化によって結合量が大きく
変化するようになる。この結果、従来の帯域通過フィル
タは広帯域な通過帯域において良好なVSWR特性が得られ
ないという問題点があった。[Problems to be Solved by the Invention] The conventional bandpass filter configured as described above is
In order to obtain a wide band characteristic, it was necessary to increase the length of the coupling hole. When the length of the coupling hole is increased, the resonance frequency becomes 2l.
Since it approaches the free space wavelength λ 0 at f 0, the rate of change of the magnetic polarization with respect to the frequency becomes large. FIG. 8 shows the relationship between Mt / M 0 and λ / λ 0 using 2l / λ 0 as a parameter. For example, when λ / λ 0 = 1 the larger Mt
It can be seen that the slope of / M 0 with respect to λ / λ 0 is large. For this reason, the amount of coupling greatly changes due to the frequency change. As a result, the conventional bandpass filter has a problem that a good VSWR characteristic cannot be obtained in a wide bandpass band.
この発明は上記のような問題点を解消するためになさ
れたもので、小形で広帯域な帯域通過フィルタを得るこ
とを目的とする。The present invention has been made to solve the above problems, and an object thereof is to obtain a compact and wide band pass filter.
［問題点を解決するための手段］ この発明に係る帯域通過フィルタは、直交する２つの
モードが共振する空胴共振器として、内面に対称に配置
され、互いに直交する方向に突出する４つのリッジ部を
設けた空胴共振器を用いたものである。[Means for Solving Problems] A bandpass filter according to the present invention is a cavity resonator in which two orthogonal modes resonate, and four ridges that are symmetrically arranged on an inner surface and project in directions orthogonal to each other. A cavity resonator provided with a section is used.
［作 用］ この発明においては、直交する２つのモードが共振す
る空胴共振器にリッジを設けたため、リッジの対向する
空間に電磁界が集中し、リッジを設けない空胴共振器よ
りも、結合孔を設ける空胴共振器の端面の中央部で大き
な電磁界が得られ、結合孔を大きくしなくても、リッジ
を設けない空胴共振器よりも大きな結合量が得られ、広
帯域な帯域通過フィルタが得られる。[Operation] In the present invention, since the ridge is provided in the cavity resonator in which two orthogonal modes resonate, the electromagnetic field is concentrated in the space where the ridge faces each other, so A large electromagnetic field can be obtained at the center of the end face of the cavity resonator with a coupling hole, and a large amount of coupling can be obtained without increasing the size of the coupling hole compared with a cavity resonator without a ridge. A pass filter is obtained.
［実施例］ 以下、この発明の一実施例を図について説明する。第
１図（ａ）はこの発明の一実施例を示す概略構成図、同
図（ｂ）はそれの横断面図、第５図は対称に設けられた
４つのリッジ部を有する円筒形導波管内の磁界分布を示
す図である。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a schematic configuration diagram showing an embodiment of the present invention, FIG. 1 (b) is a transverse sectional view thereof, and FIG. 5 is a cylindrical waveguide having four symmetrically provided ridge portions. It is a figure which shows the magnetic field distribution in a pipe.
第１図において、（1a）（1b）は円筒形空胴共振器、
（2a）（2b）は入出力方形導波管、（3a）（3b）は入出
力結合孔、（４）は十字形結合孔、（5a）（5b）は直交
するモード間の結合量調整ネジ、（６）は周波数調整ネ
ジであり、以上は第６図と同様のものである。（７）は
円筒形空胴共振器（1a）（1b）内面に対称に配置され、
互いに直交する方向に突出する４つのリッジ部であり、
矢印は円筒形空胴共振器（1a）（1b）内及び入出力方形
導波管（2a）（2b）内の電界の方向を示している。円筒
形空胴共振器（1a）（1b）には結合量調整ネジ（5a）
（5b）及び周波数調整ネジ（６）が設けられ、この周波
数調整ネジ（６）はリッジ部（７）を貫通するように設
けられている。４つのリッジ部（７）を設けた円筒形空
胴共振器（1a）（1b）も直交する２つのモードで共振が
可能であり、複モード空胴共振器として使用できる。In FIG. 1, (1a) and (1b) are cylindrical cavity resonators,
(2a) and (2b) are input / output rectangular waveguides, (3a) and (3b) are input / output coupling holes, (4) is a cross coupling hole, and (5a) and (5b) are coupling amount adjustment between orthogonal modes. The screws (6) are frequency adjusting screws, and the above is the same as that in FIG. (7) is symmetrically arranged on the inner surface of the cylindrical cavity resonator (1a) (1b),
Four ridges projecting in directions orthogonal to each other,
The arrows indicate the directions of the electric fields in the cylindrical cavity resonators (1a) (1b) and in the input / output rectangular waveguides (2a) (2b). Coupling amount adjustment screw (5a) for the cylindrical cavity (1a) (1b)
(5b) and a frequency adjusting screw (6) are provided, and the frequency adjusting screw (6) is provided so as to penetrate the ridge portion (7). The cylindrical cavity resonators (1a) and (1b) provided with the four ridge portions (7) can also resonate in two orthogonal modes and can be used as a multimode cavity resonator.
次にその動作について説明する。入出力方形導波管
（2a）から入射した電界ＥをもつTE10モード波は入出力
結合孔（3a）を介してリッジ部（７）を設けた円筒形空
胴共振器（1a）内に電界ＡをもつTE111モード波と結合
する。このTE10モード波は結合量調整ネジ（5a）の効果
により直交する電界ＢをもつTE111モード波と結合し、
さらに十字形結合孔（４）を介して円筒形空胴共振器
（1a）内のTE111モード波は円筒形空胴共振器（1b）内
の電界C,DをもつTE111モード波と結合する。電界Ｄをも
つTE111モード波は入出力結合孔（3a）を介し入出力導
波管（2b）のTE10モード波と結合し、出力として取り出
される。円筒形空胴共振器（1a）（1b）内の直交するTE
10モード波が全て同一周波数f0で共振するように調整さ
れていると前述のように入出力方形導波管（2a）への入
射波は入出力方形導波管（2b）に取り出される。しか
し、f0以外の周波数では共振器が共振しないため、入出
力方形導波管（2a）への入射波はほとんど反射され、入
出力方形導波管（2b）へは出力されない。このように、
この実施例のフィルタは従来の帯域通過フィルタと同様
に小形で、通過域近傍に減衰極をもち急峻な減衰特性を
有する帯域通過フィルタとして動作する。Next, the operation will be described. The TE 10 mode wave with the electric field E incident from the input / output rectangular waveguide (2a) enters the cylindrical cavity resonator (1a) provided with the ridge (7) through the input / output coupling hole (3a). Coupling with TE 111 mode waves with electric field A. This TE 10 mode wave is coupled with the TE 111 mode wave having an electric field B orthogonal to each other by the effect of the coupling amount adjusting screw (5a),
Further, the TE 111 mode wave in the cylindrical cavity resonator (1a) is coupled with the TE 111 mode wave having electric fields C and D in the cylindrical cavity resonator (1b) through the cross-shaped coupling hole (4). To do. The TE 111 mode wave having the electric field D is coupled with the TE 10 mode wave of the input / output waveguide (2b) through the input / output coupling hole (3a) and is taken out as an output. Orthogonal TEs in cylindrical cavity resonators (1a) (1b)
When all the 10 mode waves are adjusted to resonate at the same frequency f 0 , the incident wave to the input / output rectangular waveguide (2a) is extracted to the input / output rectangular waveguide (2b) as described above. However, since the resonator does not resonate at frequencies other than f 0 , most incident waves to the input / output rectangular waveguide (2a) are reflected and are not output to the input / output rectangular waveguide (2b). in this way,
The filter of this embodiment is small like a conventional bandpass filter, and operates as a bandpass filter having an attenuation pole near the passband and having a steep attenuation characteristic.
次に第５図に示すリッジ（７）を設けた円形導波管内
の電磁界について説明する。図において矢印は磁界の分
布を示しており、リッジ（７）の対向する空間に集中し
ている。従って、結合孔（3a）（3b）及び（４）を円筒
形空胴共振器（1a）（1b）の両端隔壁中央部、即ち対向
するリッジ（７）の中間に設ければ、大きな磁界Ｈが得
られるため、従来の帯域通過フィルタと同じ大きさの結
合孔を用いてもより大きな結合量が得られ、広帯域にわ
たり良好なVSWR特性をもつ帯域通過フィルタが得られ
る。Next, the electromagnetic field in the circular waveguide provided with the ridge (7) shown in FIG. 5 will be described. In the figure, the arrows indicate the distribution of the magnetic field, which is concentrated in the space where the ridge (7) faces. Therefore, if the coupling holes (3a), (3b) and (4) are provided in the central portions of both ends of the cylindrical cavity resonators (1a) (1b), that is, in the middle of the opposing ridges (7), a large magnetic field H Therefore, even if a coupling hole having the same size as that of the conventional bandpass filter is used, a larger coupling amount can be obtained, and a bandpass filter having a good VSWR characteristic over a wide band can be obtained.
第２図はこの発明の他の実施例を示す概略構成図及び
横断面図で、（8a）（8b）はTE101モードで共振する正
方形空胴共振器である。この場合も第１図に示す実施例
と同様に空胴共振器内に４つのリッジ部（７）を設けて
おり、大きな結合量が得られるため、広帯域な帯域通過
フィルタが実現される。FIG. 2 is a schematic configuration diagram and a cross-sectional view showing another embodiment of the present invention. (8a) and (8b) are square cavity resonators that resonate in the TE 101 mode. Also in this case, as in the embodiment shown in FIG. 1, four ridge portions (7) are provided in the cavity resonator, and a large amount of coupling is obtained, so that a wide band pass filter is realized.
第３図はこの発明のさらに他の実施例を示す概略構成
図及び正面図である。この場合は円筒形空胴共振器（1
a）（1b）内のリッジ（７）の他に入出力方形導波管（2
a）（2b）の中にもリッジ（９）を設けている。このた
め入出力方形導波管（2a）（2b）の電磁界も結合孔（3
a）（3b）の付近に集中し、大きな結合量が得られるた
め、広帯域な帯域通過フィルタが実現される。FIG. 3 is a schematic configuration diagram and a front view showing still another embodiment of the present invention. In this case, the cylindrical cavity resonator (1
a) In addition to the ridge (7) in (1b), the input / output rectangular waveguide (2
A ridge (9) is provided in a) and (2b). Therefore, the electromagnetic fields of the input / output rectangular waveguides (2a) (2b) are
Since it concentrates in the vicinity of a) and (3b) and a large amount of coupling is obtained, a wideband bandpass filter is realized.
第４図はこの発明のさらに他の実施例を示す概略構成
図で、リッジ（７）を設けた円筒形空胴共振器（1a）と
リッジ（７）を設けない円筒形空胴共振器（1b）を組み
合わせた場合である。この場合も入出力方形導波管（2
a）と円筒形空胴共振器（1a）との間に大きな結合量が
得られるため、入力側と出力側で異なる結合量を必要と
する非対称構造の帯域通過フィルタの広帯域化を実現す
ることができる。FIG. 4 is a schematic configuration diagram showing still another embodiment of the present invention, in which a cylindrical cavity resonator (1a) provided with a ridge (7) and a cylindrical cavity resonator not provided with a ridge (7) ( This is the case when 1b) is combined. In this case, the input / output rectangular waveguide (2
Since a large amount of coupling can be obtained between a) and the cylindrical cavity resonator (1a), it is necessary to realize a bandpass filter with an asymmetric structure that requires different amounts of coupling on the input side and the output side. You can
なお、上記実施例では空胴共振器の数が２個の場合に
ついて述べたが、空胴共振器の数が３個以上の場合にも
適用できる。また、空胴共振器がTE111モード或はTE101
モードで共振する場合について述べたが、この発明はTE
11n或いはTE10nモード（ｎ＝2,3,……）で共振する場合
にも適用できる。Although the above embodiment has described the case where the number of cavity resonators is two, it can be applied to the case where the number of cavity resonators is three or more. In addition, if the cavity resonator is TE 111 mode or TE 101
Although the case of resonating in the mode has been described, the present invention
It can also be applied when resonating in 11n or TE 10n mode (n = 2,3, ...).
［発明の効果］ 以上のように、この発明によれば直交する２つのモー
ドで共振する複モード空胴共振器として、内面に対称に
配置された４つのリッジ部を設けた空胴共振器を用いた
ので、より広帯域な帯域通過特性で急峻な減衰特性をも
ち、しかも小形な帯域通過フィルタが得られる効果があ
る。EFFECTS OF THE INVENTION As described above, according to the present invention, as a multimode cavity resonator that resonates in two orthogonal modes, a cavity resonator provided with four ridge portions symmetrically arranged on the inner surface is used. Since it is used, there is an effect that a bandpass filter having a wider bandpass characteristic and steep attenuation characteristics and a small bandpass filter can be obtained.
第１図はこの発明の一実施例を示す概略構成図及び横断
面図、第２図はこの発明の他の実施例を示す概略構成図
及び横断面図、第３図はこの発明のさらに他の実施例を
示す概略構成図及び正面図、第４図はこの発明のさらに
他の実施例を示す概略構成図、第５図はリッジを設けた
円形導波管の磁界分布を示す図、第６図は従来の帯域通
過フィルタを示す概略構成図、第７図は第６図の帯域通
過フィルタの減衰特性を示す図、第８図は結合孔の磁気
偏極率の周波数特性を示す図である。 図において、（1a）（1b）は円筒形空胴共振器、（2
a）（2b）は入出力方形導波管、（3a）（3b）は入出力
結合孔、（４）は十字形結合孔、（５）は結合量調整用
ネジ、（６）は周波数調整ネジ、（７）は円筒形空胴共
振器内に設けられたリッジ部、（８）は正方形空胴共振
器、（９）は入出力方形導波管内に設けられたリッジ部
である。 なお、図中同一符号は同一或は相当部分を示す。FIG. 1 is a schematic configuration diagram and a transverse sectional view showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram and a transverse sectional view showing another embodiment of the present invention, and FIG. FIG. 4 is a schematic configuration diagram and a front view showing another embodiment of the present invention, FIG. 4 is a schematic configuration diagram showing another embodiment of the present invention, and FIG. 5 is a diagram showing a magnetic field distribution of a circular waveguide provided with a ridge. FIG. 6 is a schematic configuration diagram showing a conventional bandpass filter, FIG. 7 is a diagram showing an attenuation characteristic of the bandpass filter of FIG. 6, and FIG. 8 is a diagram showing frequency characteristics of magnetic polarization of a coupling hole. is there. In the figure, (1a) and (1b) are cylindrical cavity resonators, and (2
a) (2b) is an input / output rectangular waveguide, (3a) and (3b) are input / output coupling holes, (4) is a cross coupling hole, (5) is a coupling amount adjusting screw, and (6) is frequency adjusting. A screw, (7) is a ridge portion provided in the cylindrical cavity resonator, (8) is a square cavity resonator, and (9) is a ridge portion provided in the input / output rectangular waveguide. In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 武田 文雄 神奈川県鎌倉市大船５丁目１番１号 三菱 電機株式会社情報電子研究所内 (56)参考文献 特開 昭58−119205（ＪＰ，Ａ) 特開 昭57−155802（ＪＰ，Ａ) 実開 昭61−40001（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumio Takeda 5-1-1, Ofuna, Kamakura-shi, Kanagawa Mitsubishi Electric Corporation, Information Electronics Laboratory (56) Reference Japanese Patent Laid-Open No. 58-119205 (JP, A) Opened 57-155802 (JP, A) Opened 61-40001 (JP, U)
Claims (5)
共振し、これら両モードの結合量調整手段及び周波数調
整手段を備えた、互いに十字形結合孔を介して結合した
２個の複モード空胴共振器とを、それらの隔壁の中央部
に設けられた細長の入出力結合孔を介して結合させた帯
域通過フィルタにおいて、上記複モード空胴共振器の内
面に、対称に配置され上記入出力結合孔の長手及びこれ
と直交する方向にそれぞれ突出する４つのリッジ部を設
けたことを特徴とする帯域通過フィルタ。1. Two input-output waveguides, which resonate in two modes orthogonal to each other, and which are provided with coupling amount adjusting means and frequency adjusting means for both modes and which are coupled to each other through a cross-shaped coupling hole. In a bandpass filter in which a multimode cavity resonator is coupled through an elongated input / output coupling hole provided in the center of the partition wall, symmetrically arranged on the inner surface of the multimode cavity resonator. A band-pass filter comprising four ridge portions projecting in the length of the input / output coupling hole and in a direction orthogonal to the length.
胴共振器を用いた特許請求の範囲第１項記載の帯域通過
フィルタ。2. The bandpass filter according to claim 1, wherein a cylindrical cavity resonator is used as the multimode cavity resonator.
胴共振器を用いた特許請求の範囲第１項記載の帯域通過
フィルタ。3. The bandpass filter according to claim 1, wherein a square cavity resonator is used as the multimode cavity resonator.
方にのみ上記４つのリッジ部を設けたことを特徴とする
特許請求の範囲第１項記載の帯域通過フィルタ。4. The bandpass filter according to claim 1, wherein the four ridge portions are provided only on one of the two multimode cavity resonators.
を設けたリッジ導波管を用いた特許請求の範囲第１項〜
第４項の何れかに記載の帯域通過フィルタ。5. A ridge waveguide provided with a ridge portion in the pipe is used as the input / output waveguide.
The bandpass filter according to any one of item 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61302578A JPH0831722B2 (en) | 1986-12-18 | 1986-12-18 | Bandpass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61302578A JPH0831722B2 (en) | 1986-12-18 | 1986-12-18 | Bandpass filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63155802A JPS63155802A (en) | 1988-06-29 |
| JPH0831722B2 true JPH0831722B2 (en) | 1996-03-27 |
Family
ID=17910665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61302578A Expired - Fee Related JPH0831722B2 (en) | 1986-12-18 | 1986-12-18 | Bandpass filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0831722B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5418510A (en) * | 1993-11-22 | 1995-05-23 | Hughes Aircraft Company | Cylindrical waveguide resonator filter section having increased bandwidth |
| US5534881A (en) * | 1994-08-31 | 1996-07-09 | Hughes Aircraft Company | Microwave filter assembly having a nonsymmetrical waveguide and an antenna |
| CN103326098B (en) * | 2013-07-06 | 2016-03-30 | 中国科学技术大学 | A kind of bimodulus polarization cavity with adjustable coupling hole |
| KR102510434B1 (en) | 2022-08-17 | 2023-03-16 | 국방과학연구소 | Antenna apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155802A (en) * | 1981-03-23 | 1982-09-27 | Nec Corp | Band pass filter |
| JPS58119205A (en) * | 1982-01-08 | 1983-07-15 | Mitsubishi Electric Corp | Waveguide coupling device |
| JPS6140001U (en) * | 1984-08-15 | 1986-03-13 | 日本電信電話株式会社 | Branching circuit |
-
1986
- 1986-12-18 JP JP61302578A patent/JPH0831722B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63155802A (en) | 1988-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5136268A (en) | Miniature dual mode planar filters | |
| US20080122559A1 (en) | Microwave Filter Including an End-Wall Coupled Coaxial Resonator | |
| US5349316A (en) | Dual bandpass microwave filter | |
| EP1161775B1 (en) | Waveguide filter having asymmetrically corrugated resonators | |
| US6169466B1 (en) | Corrugated waveguide filter having coupled resonator cavities | |
| US4644305A (en) | Odd order elliptic waveguide cavity filters | |
| JPH0831722B2 (en) | Bandpass filter | |
| JP2641090B2 (en) | Dual mode cavity resonator for waveguide bandpass filter | |
| JPH06101643B2 (en) | Bandpass filter | |
| JPH07283601A (en) | Tm multiple mode dielectric resonator device | |
| JPH0630401B2 (en) | Bandpass filter | |
| JPS6046562B2 (en) | microwave bandpass filter | |
| JPS63232602A (en) | Resonance filter | |
| JPS5821844B2 (en) | micro hatadan filter | |
| JPS645481B2 (en) | ||
| US6104262A (en) | Ridged thick walled capacitive slot | |
| JPH05315805A (en) | Strip line loop resonator filter | |
| JPH0650801B2 (en) | Waveguide demultiplexer | |
| JPS6115602B2 (en) | ||
| JPS6311802B2 (en) | ||
| JPH0614601B2 (en) | Bandpass filter | |
| JP3146270B2 (en) | Band stop filter | |
| JP2807003B2 (en) | Interdigital filter | |
| JPH0247604Y2 (en) | ||
| JPH03216001A (en) | Dielectric filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |