JP2854694B2 - Bandpass filter with group delay time compensation - Google Patents
Bandpass filter with group delay time compensationInfo
- Publication number
- JP2854694B2 JP2854694B2 JP2232678A JP23267890A JP2854694B2 JP 2854694 B2 JP2854694 B2 JP 2854694B2 JP 2232678 A JP2232678 A JP 2232678A JP 23267890 A JP23267890 A JP 23267890A JP 2854694 B2 JP2854694 B2 JP 2854694B2
- Authority
- JP
- Japan
- Prior art keywords
- shield case
- axial direction
- resonance frequency
- metal screw
- coupling
- 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
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- Control Of Motors That Do Not Use Commutators (AREA)
- Waveguide Connection Structure (AREA)
- Transceivers (AREA)
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 ディジタル自動車電話の基地局において、一基の空中
線に多数のディジタル送信機を接続して空中線共用装置
を構成するに当って、各ディジタル送信機と分岐回路の
間に挿入される帯域通過ろ波器の特性として通過帯域幅
が広く、帯域内における群遅延時間の平坦なことが要求
されるが、本発明は、このような特性を有する帯域通過
ろ波器に関するものである。DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICABILITY In a base station of a digital car telephone, when a large number of digital transmitters are connected to one antenna to form an antenna sharing apparatus, each digital transmitter is branched. The bandpass filter inserted between the circuits is required to have a wide passband width and a flat group delay time within the band. The present invention provides a bandpass filter having such characteristics. It relates to a wave device.
従来の技術および発明が解決しようとする課題 第17図は、従来の帯域通過ろ波器における伝送波の群
遅延時間特性の一例を示す曲線図で、横軸は正規化周波
数ｘ、縦軸は遅延時間τ(x)であるが、図から明らかな
ように、従来の帯域通過ろ波器は一般に伝送波の群遅延
時間が一様でないため、ディジタル自動車電話の基地局
における空中線共用装置等の構成素子として不適であ
る。FIG. 17 is a curve diagram showing an example of a group delay time characteristic of a transmission wave in a conventional bandpass filter, where the horizontal axis is a normalized frequency x, and the vertical axis is The delay time is τ (x) . As is clear from the figure, the conventional band-pass filter generally has a non-uniform group delay time of the transmission wave. It is not suitable as a component.
課題を解決するための手段 本発明は、主共振器および補償用共振器を備え、前記
主共振器が、 有底筒状の第１のシールドケース内に同軸状に設けた
筒状の第１の誘電体共振素子と、 前記第１の誘電体共振素子内に同軸状に設けた可動誘
電体より成る第１の共振周波数粗調整素子と、 前記第１のシールドケースに取付けた入力結合素子お
よび出力結合素子と、 前記第１のシールドケースの側壁に設けられ、各軸方
向と前記シールドケースの中心軸を結ぶ中心角がほぼ90
°をなす第１および第２の共振周波数微調整用金属螺子
と、 前記第１のシールドケースの側壁に設けられ、軸方向
が、前記第１または第２の共振周波数微調整用金属螺子
の軸方向とほぼ45°またはほぼ135°の角度差を有する
第１のモード結合調整用金属螺子と、 前記第１のシールドケースの側壁に設けられ、軸方向
が、前記第１のモード結合調整用金属螺子の軸方向とほ
ぼ90°の角度差を有する第２のモード結合調整用金属螺
子とを備えて成り、 前記補償用共振器が、 前記第１のシールドケースと結合孔を介して結合され
た有底筒状の第２のシールドケース内に同軸状に設けた
第２の誘電体共振素子と、 前記第２の誘電体共振素子内に同軸状に設けた可動誘
電体より成る第２の共振周波数粗調整素子と、 前記第２のシールドケースの側壁に設けられ、各軸方
向が、前記第１および第２の共振周波数微調整用金属螺
子の各軸方向にそれぞれほぼ一致する第３および第４の
共振周波数微調整用金属螺子と、 前記第２のシールドケースの側壁に設けられ、各軸方
向が、前記第１および第２のモード結合調整用用金属螺
子の各軸方向にほぼ一致する第３および第４のモード結
合調整用金属螺子とを備えて成る帯域通過ろ波器を実現
することによって、従来の欠点を除こうとするものであ
る。Means for Solving the Problems The present invention comprises a main resonator and a compensating resonator, wherein the main resonator is coaxially provided in a bottomed first cylindrical shield case. A first resonance frequency coarse adjustment element comprising a movable dielectric coaxially provided in the first dielectric resonance element; an input coupling element attached to the first shield case; An output coupling element, provided on a side wall of the first shield case, wherein a central angle connecting each axis direction and a central axis of the shield case is substantially 90;
The first and second resonance frequency fine-adjustment metal screws forming an angle with the first and second resonance frequency fine-adjustment metal screws are provided on a side wall of the first shield case. A first mode coupling adjustment metal screw having an angle difference of approximately 45 ° or approximately 135 ° with respect to the direction, and a first mode coupling adjustment metal screw provided on a side wall of the first shield case and having an axial direction. A second mode coupling adjusting metal screw having an angle difference of about 90 ° with the axial direction of the screw, wherein the compensating resonator is coupled to the first shield case via a coupling hole. A second resonance element comprising a second dielectric resonance element provided coaxially in a second shield case having a bottomed cylindrical shape, and a second resonance element comprising a movable dielectric substance provided coaxially in the second dielectric resonance element. A frequency coarse adjustment element; And third and fourth resonance frequency fine-tuning metal screws whose respective axial directions substantially coincide with the respective axial directions of the first and second resonance frequency fine-tuning metal screws; and the second shield. A third and a fourth mode coupling adjusting metal screw, each of which is provided on a side wall of the case and whose axial direction substantially matches each axial direction of the first and second mode coupling adjusting metal screws. It is an attempt to eliminate the disadvantages of the prior art by realizing a bandpass filter comprising:
作用 主共振器における共振周波数粗調整素子の共振素子内
への挿入長および共振周波数微調整用金属螺子の管内挿
入長を各調整して伝送波に共振せしめるとともに、モー
ド結合調整用金属螺子の管内挿入長を調整して入力波の
偏波面を90°またはほぼ90°回転せしめ、さらに、補償
用共振器における共振周波数粗調整素子の共振素子内へ
の挿入長および共振周波数微調整用金属螺子の管内挿入
長を各調整して伝送波に共振せしめるとともに、モード
結合調整用金属螺子の管内挿入長を調整することによ
り、主共振器と補償用共振器との結合度および補償用共
振器におけるモード結合調整用金属螺子の管内挿入長に
応じて伝送波の群遅延時間の不均一性が補償される。Action The insertion length of the resonance frequency coarse adjustment element into the resonance element and the insertion length of the resonance frequency fine adjustment metal screw in the main resonator in the tube are adjusted to resonate with the transmission wave, and the mode coupling adjustment metal screw is inserted in the tube. The insertion length is adjusted to rotate the polarization plane of the input wave by 90 ° or almost 90 ° .Furthermore, the insertion length of the resonance frequency coarse adjustment element in the compensation resonator and the metal screw for resonance frequency fine adjustment are adjusted. By adjusting the insertion length in the tube to resonate with the transmission wave and adjusting the insertion length of the metal screw for mode coupling adjustment in the tube, the degree of coupling between the main resonator and the compensation resonator and the mode in the compensation resonator are adjusted. The non-uniformity of the group delay time of the transmission wave is compensated according to the insertion length of the coupling adjusting metal screw in the tube.
実施例 第１図は、本発明の一実施例を示す断面図（第２図の
Ｅ−Ｅ断面図）、第２図は正面図、第３図は、第１図の
Ａ−Ａ断面図、第４図は、第１図のＢ−Ｂ端面図、第５
図は、第１図のＣ−Ｃ端面図、第６図は、第１図のＤ−
Ｄ端面図、第７図は背面図で、各図において、11は有底
筒状の導体より成るシールドケースの側壁、12および13
は端壁で、図には側壁11の横断面の輪郭形状を円形に形
成した場合を例示してあるが、例えば八角形に形成して
も本発明を実施することができる。Embodiment FIG. 1 is a cross-sectional view (EE cross-sectional view of FIG. 2) showing one embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is an AA cross-sectional view of FIG. FIG. 4 is a sectional view taken along the line BB of FIG.
The drawing is a cross-sectional view taken along the line CC of FIG. 1, and FIG.
D end view in FIG. 7 is a rear view, in the figures, 1 1 a side wall of the shield case made of a bottomed cylindrical conductor, 1 2 and 1 3
In the end wall, although the drawings are to illustrate the case of forming the contour of the cross section of the side wall 1 1 to a circle, it can also implement the present invention by forming, for example, octagonal.
14は導体より成る仕切壁で、シールドケースの中心軸
の1/2またはほぼ1/2の点において中心軸と直交またはほ
ぼ直交してシールドケース内を２分するように設けてあ
る。1 4 is a partition wall made of a conductor, is provided with the shield case to 2 minutes orthogonal or substantially orthogonal to the central axis in terms of half or nearly half of the central axis of the shield case.
21は筒状の誘電体より成るHE11δモード誘電体共振素
子で、シールドケースの側壁11と同軸状に設けてある。2 1 is a HE 11Deruta mode dielectric resonator element made of tubular dielectric, it is provided on the side wall 1 1 and coaxial shield case.
31は共振素子21の支持部で、共振素子21と一体に形成
された筒状の誘電体より成り、その端部に突設された鍔
状の突起部を止め螺子４によって仕切壁14に固定して、
共振素子21を所要位置に保持せしめる。3 1 is a support of the resonator element 2 1, consists tubular dielectric formed integrally with the resonant element 2 1, the partition wall by screws 4 stop collar-shaped projections projecting from the end thereof fixed to 1 to 4,
Allowed to hold the resonant element 2 1 to the required position.
51は共振周波数粗調整素子で、筒状または柱状の誘電
体より成り、共振素子21の中空内部に同軸状に、かつ、
軸方向に移動自在に設けてある。61は粗調整素子51の駆
動用送り螺子である。5 1 at the resonant frequency rough adjustment element consists of a cylindrical or columnar dielectric, coaxially within the hollow interior of the resonant element 2 1, and,
It is provided movably in the axial direction. 6 1 is driving the feed screw of the coarse adjustment device 5 1.
７は入力（または出力）端子、８は出力（または入
力）端子で、それぞれ例えば同軸接栓より成る。Reference numeral 7 is an input (or output) terminal, and 8 is an output (or input) terminal, each of which is formed of, for example, a coaxial plug.
９は入力（または出力）結合素子、10は出力（または
入力）結合素子で、第１図および第３図に示したよう
に、結合素子９および10をそれぞれループで形成した場
合には、各ループ面の延長面の交線がシールドケースの
中心軸に一致またはほぼ一致するとともに、各ループ面
の延長面の交角が90°またはほぼ90°となるように形成
してある。Reference numeral 9 denotes an input (or output) coupling element, and 10 denotes an output (or input) coupling element. As shown in FIGS. 1 and 3, when the coupling elements 9 and 10 are respectively formed by loops, The intersection of the extension surfaces of the loop surfaces is formed so as to coincide or substantially coincide with the central axis of the shield case, and the intersection angle of the extension surfaces of the respective loop surfaces is 90 ° or approximately 90 °.
結合素子９および10をループで形成する代りに、容量
結合用プローブで形成し、各プローブの軸の延長線の交
点がシールドケースの中心軸に一致またはほぼ一致する
とともに、各プローブの軸の延長線の交角が90°または
ほぼ90°となるように形成しても本発明を実施すること
ができる。Instead of forming the coupling elements 9 and 10 by loops, they are formed by capacitive coupling probes, and the intersections of the extension lines of the axes of the respective probes coincide with or substantially coincide with the central axis of the shield case, and the extension of the axes of the respective probes. The present invention can be implemented even if the intersection angle of the lines is formed to be 90 ° or almost 90 °.
111は入力（または出力）波の共振周波数微調整用金
属螺子で、その軸方向が入力（または出力）結合素子９
のループ面（結合素子９を容量結合用プローブで形成し
た場合は、その軸方向）に一致またはほぼ一致するよう
にシールドケースの側壁11に取付けてある。11 1 is a metal screw for fine adjustment of the resonance frequency of the input (or output) wave, the axial direction of which is the input (or output) coupling element 9.
Loop plane of the (case of forming the coupling elements 9 with capacitive coupling probe, the axial direction) is attached to the side wall 1 1 of the shield case to match or nearly match.
121は出力（または入力）波の共振周波数微調整用金
属螺子で、その軸方向が入力（または出力）結合素子10
のループ面（結合素子10を容量結合用プローブで形成し
た場合は、その軸方向）に一致またはほぼ一致するよう
にシールドケースの側壁11に取付けてある。12 1 is a metal screw for fine adjustment of the resonance frequency of the output (or input) wave, the axial direction of which is the input (or output) coupling element 10
Loop plane of the (case of forming the coupling element 10 in the capacitive coupling probe, the axial direction) is attached to the side wall 1 1 of the shield case to match or nearly match.
131および141はそれぞれモード結合調整用金属螺子
で、各軸の延長線の交点がシールドケースの中心軸に一
致またはほぼ一致し、各軸方向の交角が90°またはほぼ
90°となるとともに、モード結合調整用金属螺子131の
軸方向が、共振周波数微調整用金属螺子111および121の
各軸方向に対して45°またはほぼ45°の角度差を有する
ようにシールドケースの側壁11に取付けてある。13 1 and 14 1 are metal screws for mode coupling adjustment, respectively.The intersection of the extension of each axis coincides or almost coincides with the central axis of the shield case, and the intersection angle in each axis direction is 90 ° or almost
At 90 °, the axial direction of the mode coupling adjustment metal screw 13 1 has an angle difference of 45 ° or almost 45 ° with respect to each axis direction of the resonance frequency fine adjustment metal screw 11 1 and 12 1. It is attached to the side wall 1 of the shield case.
以上の各部品、シールドケースの側壁11、端壁12およ
び仕切壁14によって主となるHE11δモード誘電体共振器
（以下、主共振器と略称する）が構成される。Each of the above components, the side wall 1 1 of the shield case, the end wall 1 2 and the main by the partition wall 1 4 HE 11δ mode dielectric resonator (hereinafter, referred to as main resonator) is formed.
なお、結合素子９および10をループで形成した場合、
各ループの面積は主共振器の負荷Ｑに応じて適宜定め
る。When the coupling elements 9 and 10 are formed in a loop,
The area of each loop is appropriately determined according to the load Q of the main resonator.
次に、22は筒状の誘電体より成るHE11δモード誘電体
共振素子、32は共振素子22の支持部で、これらは主共振
器を構成する共振素子21および支持部31と同一またはほ
ぼ同一の形状寸法に形成し、仕切壁14に対して共振素子
21および支持部31と共振素子22および支持部32の位置関
係が互いに対称となるように、止め螺子４によって仕切
壁14に固定してある。Then, 2 2 consists of a cylindrical dielectric HE 11Deruta mode dielectric resonator element, 3 2 in support of the resonant elements 2 2, resonant element 2 1 and the support part 3 1 These constituting the main resonator It was formed in the same or substantially the same shape dimensions as the resonant element relative to the partition wall 1 4
2 1 and the support part 3 1 a so that the position relationship of the resonant elements 2 2 and the support part 3 2 are symmetrical to each other, is fixed to the partition wall 1 4 by set screws 4.
52は共振周波数粗調整素子、62は送り螺子で、これら
もまた主共振器を構成する粗調整素子51および送り螺子
61と同様の構成である。5 2 resonant frequency rough adjustment element, 6 2 at a feed screw, they too coarse adjustment device 5 1 and a feed screw which constitutes the main resonator
61 Same configuration as 1 .
112および122は共振周波数微調整用金属螺子、132お
よび142はモード結合調整用金属螺子で、各金属螺子の
軸方向を主共振器を構成する金属螺子111、121、131お
よび141の各軸方向に一致またはほぼ一致せしめてシー
ルドケースの側壁11に取付けてある。11 2 and 12 2 are metal screws for fine adjustment of resonance frequency, 13 2 and 14 2 are metal screws for mode coupling adjustment, and the metal screw 11 1 , 12 1 , 13 It is attached to the side wall 1 1 of the shield case matching or substantially brought match 1 and 14 1 of each axis direction.
以上の各部品、シールドケースの側壁11、端壁13およ
び仕切壁14によって群遅延時間補償用共振器（以下、補
償用共振器と略称する）が構成される。Each of the above components, the side wall 1 1 of the shield case, the end wall 1 3 and the partition wall 1 4 by group delay compensation resonator (hereinafter, referred to as compensation cavity) is formed.
15は主共振器と補償用共振器の磁界結合孔で、第１図
および第５図には、仕切壁14の中心部、すなわち、支持
部31および32の内側における仕切壁14の部分に結合孔15
を穿った場合を例示してあるが、支持部31および32の外
側で、磁束密度の比較的密なる部分に対応する仕切壁14
の部分に設けるようにしてもよい。15 is a magnetic field coupling hole of the main resonator and the compensation for the resonator, the first view and FIG. 5, the central portion of the partition wall 1 4, i.e., the supporting portion 3 1 and 3 2 of the partition walls 1 4 in the inner Hole 15
The is illustrated the case where bored, but outside of the support part 3 1 and 3 2, the partition wall 1 4 corresponding to the relatively dense Naru portion of the magnetic flux density
May be provided in the portion of the above.
なお、金属螺子111、121、112および122の各軸長、す
なわち、各最大管内挿入長は、シールドケースならびに
誘電体共振素子21および22の各楕円度に応じて適宜定め
る。The metal screws 11 1, 12 1, 11 2 and 12 each axial length of 2, i.e., the maximum tube insertion length, determined as appropriate according to the shield case and the dielectric respective ellipses of the resonant element 2 1 and 2 2 .
また、主共振器側の金属螺子111と131、131と121およ
び121と141の各軸方向の角度差をそれぞれ45°またはほ
ぼ45°に選ぶ代りに、例えば金属螺子111と131の各軸方
向の角度差を45°＋90°＝135°またはほぼ135°に選ぶ
（すなわち、金属螺子111または131の取付け個所を、第
４図示の場合に対してシールドケースの中心軸に対称の
個所に選ぶ）ようにしても本発明を実施することができ
る。Also, instead of selecting the angle difference in each axial direction of the main resonator side metal screws 11 1 and 13 1 , 13 1 and 12 1 and 12 1 and 14 1 to 45 ° or almost 45 °, for example, the metal screw 11 select 1 and 13 1 of the angular difference of each axis direction in 45 ° + 90 ° = 135 ° or approximately 135 ° (i.e., the attachment point of the metal screw 11 1 or 13 1, the shield case with respect to the case of the fourth illustrated The present invention can also be implemented by selecting a point symmetrical with respect to the central axis.
図には、金属螺子111、131、121および141を各１個ず
つ設けた場合を例示してあるが、図示した金属螺子の他
に、それぞれシールドケースの中心軸に対称的なシール
ドケースの側壁個所にも設けるようにしてもよく、任意
の一部の金属螺子は１個、他の金属螺子はシールドケー
スの中心軸に対称的に２個を設けるようにしてもよい。In the figure, the case where one metal screw 11 1 , 13 1 , 12 1, and 14 1 is provided is illustrated, but in addition to the illustrated metal screw, each is symmetrical with respect to the center axis of the shield case. It may be provided at the side wall portion of the shield case, and one metal screw may be provided arbitrarily, and two metal screws may be provided symmetrically with respect to the center axis of the shield case.
さらに、金属螺子111、131、121および141は、これら
をシールドケースの端壁12と仕切壁14間における中心軸
の長さの1/2の個所に対応する側壁11の周面に設ける代
りに、端壁12と仕切壁14間における中心軸の長さの1/2
の個所から左右いずれかに適宜偏った個所に対応する側
壁11の周面に設けるようにしてもよい。Furthermore, the metal screws 11 1, 13 1, 12 1 and 14 1, the side wall 1 1 them corresponding to 1/2 of the point of the length of the central axis between the end wall 1 2 and the partition wall 1 4 of the shield case 1/2 of the instead of providing the peripheral surface, the length of the central axis between the end wall 1 2 and the partition wall 1 4
From locations either to the left or to the right it may be provided on the peripheral surface of the corresponding side wall 1 1 appropriately skewed positions.
補償用共振器における金属螺子112、132、122および1
42の各軸方向の角度差、設置個数および設置個所等も主
共振器における金属螺子111、131、121および141につい
て説明したと同様に構成して本発明を実施することがで
きる。Metal screw 11 2 in the compensation for the resonator, 13 2, 12 2 and 1
4 angular difference of each axis direction of the two, is possible to implement the present invention constructed in the same manner as described for the metal screw 11 1, 13 1, 12 1 and 14 1 at the installation number and the installation location or the like also main resonator it can.
この場合、主共振器（または補償用共振器）における
各金属螺子の軸方向の角度差、設置個数および設置個所
等は図面に例示したように構成し、補償用共振器（また
は主共振器）における各金属螺子の軸方向の角度差、設
置個数および設置個所等は上述した図示以外の実施態様
のように構成してもよく、主共振器および補償用共振器
における各金属螺子の軸方向の角度差、設置個数および
設置個所等を、ともに上述した図示以外の実施態様のよ
うに構成してもよい。In this case, the axial angle difference, the number of installations, and the location of each metal screw in the main resonator (or the compensation resonator) are configured as illustrated in the drawing, and the compensation resonator (or the main resonator) is used. The angle difference in the axial direction of each metal screw, the number of installations, the installation location, and the like may be configured as in the above-described embodiment other than the illustrated embodiment, and the axial direction of each metal screw in the main resonator and the compensation resonator may be configured. The angle difference, the number of installations, the installation locations, and the like may all be configured as in the above-described embodiments other than those illustrated.
以上は、共通のシールドケースの中間部に仕切壁14を
設け、この仕切壁14の左右に主共振器および補償用共振
器を構成した場合を例示したが、主共振器および補償用
共振器を各独立に構成し、各共振器における共振素子の
支持部を固定したシールドケースの各端壁を互いに密着
固定するとともに、この密着固定された両端壁を貫いて
磁界結合孔を設けるようにしても本発明を実施すること
ができる。Above, the partition wall 1 4 provided in an intermediate portion of the common shield case has been described by way of case where the main resonator and the compensation cavity on the left and right of the partition wall 1 4, the main resonator and the compensation for resonance The shields are fixed independently of each other, and the end walls of the shield case to which the support of the resonance element in each resonator are fixed are closely fixed to each other, and a magnetic field coupling hole is provided through the closely fixed both end walls. However, the present invention can be practiced.
本発明帯域通過ろ波器においては、送り螺子61および
62を各正方向または逆方向に回転させて共振周波数粗調
整素子51および52を前進または後退せしめることによっ
て主共振器および補償用共振器の各共振周波数を比較的
大幅に変えることができる。In the present invention the band-pass device, the feed screw 61 and
6 2 be varied relatively greatly each resonant frequency of the main resonator and the compensation cavity by being rotated in the forward or reverse direction allowed to advance or retract the resonant frequency coarse adjustment device 5 1 and 5 2 it can.
すなわち、粗調整素子51および52の共振素子21および
22の中空内部への挿入長を大ならしめることによって共
振周波数が低くなる方へ比較的大幅に変化せしめ、逆に
粗調整素子51および52の挿入長を小ならしめることによ
って共振周波数が高くなる方へ比較的大幅に変化せしめ
ることができる。That is, the coarse adjustment device 5 1 and 5 2 resonant element 2 1 and
2 2 of the insertion length of the hollow interior relatively greatly contain altered towards the resonance frequency by occupying become large decreases, the resonance frequency by occupying become reverse to the insertion length of the coarse adjustment device 5 1 and 5 2 small Can be changed relatively largely toward higher values.
共振周波数微調整用金属螺子111、121、112および122
の各管内挿入長を変化せしめることにより、共振周波数
を微細に調整することができる。Metal screws 11 1 , 12 1 , 11 2 and 12 2 for fine adjustment of resonance frequency
The resonance frequency can be finely adjusted by changing the insertion length in each tube.
なお、主共振器（または補償用共振器）における入力
波の共振回路および出力波の共振回路における各共振周
波数は、粗調整素子51（または52）の共振素子21（また
は22）内への挿入長に応じて同時に変化するが、両共振
回路の共振周波数が完全に一致して変化するとは限らな
いので、微調整用金属螺子111および121（または112お
よび122）の各管内挿入長を微細に変化せしめて、粗調
整素子51（または52）による調整時に生じた共振周波数
の変化の相違による共振周波数の相違を補償するととも
に、各共振回路を所要の共振周波数に正確に一致せしめ
る。The main resonator (or compensated resonator) each resonant frequency in the resonant circuit of the resonant circuit and the output wave of the input wave in the resonant element 2 1 coarse adjustment device 5 1 (or 5 2) (or 2 2) change at the same time in accordance with the insertion length of the inner, but since the resonance frequencies of both resonant circuits are not necessarily varies exactly match, finely adjusting metal screw 11 1 and 12 1 (or 11 2 and 12 2) and allowed finely changing the respective tube insertion length, while compensating for the difference in resonant frequency due to the difference in the change in the resonance frequency caused when adjustment by the coarse adjustment device 5 1 (or 5 2), the required resonance of each resonant circuit Make it exactly match the frequency.
また、モード結合調整用金属螺子131、141、132およ
び142の各管内挿入長を変化せしめることにより、入力
波の偏波面を適宜回転せしめることができる。Further, by changing the insertion length of the mode coupling adjusting metal screws 13 1 , 14 1 , 13 2 and 14 2 in the respective tubes, the plane of polarization of the input wave can be appropriately rotated.
いま、入力（または出力）結合素子９および出力（ま
たは入力）結合素子10をそれぞれループで形成し、仕切
壁14に設けた磁界結合孔15の直径が極めて小であるか、
仕切壁14に磁界結合孔15を設けていないものと仮定した
場合において、端子７および結合ループ９を介して伝送
波を入力せしめ、粗調整素子51の共振素子21内への挿入
長および金属螺子111および121の各管内挿入長を調整し
て主共振器を入力波に共振せしめるとともに、金属螺子
131および141の各管内挿入長を調整して入力波の偏波面
を直角又はほぼ直角に回転せしめ、結合ループ10および
端子８を介して伝送波を出力せしめた際における入力波
の電磁界分布は第８図、出力波の電磁界分布は第９図、
主共振器の等価回路は第10図にそれぞれ示すとおりとな
る。Now, the input (or output) coupling element 9 and the output (or input) of the coupling element 10 to form a loop respectively, or the diameter of the magnetic coupling hole 15 provided in the partition wall 1 4 is very small,
In assuming that the partition wall 1 4 is not provided magnetic field coupling hole 15, the insertion length of the pin 7 and the coupling loops 9 made to enter the transmission waves via a coarse adjustment device 5 first resonant element 2 1 And adjust the insertion length of each of the metal screws 11 1 and 12 1 in each tube so that the main resonator resonates with the input wave.
13 1 and 14 to adjust the respective tube insertion length of 1 rotated plane of polarization of the input wave at right angles or substantially right angle, the electromagnetic field of the input wave in time of allowed outputs transmission waves through the coupling loop 10 and the terminal 8 The distribution is shown in FIG. 8, and the electromagnetic field distribution of the output wave is shown in FIG.
The equivalent circuit of the main resonator is as shown in FIG.
第８図および第９図において矢印を付した実線は電
界、矢印を付した破線は磁界を示し、第10図におけるR
H1は入力波の共振回路、RV1は出力波の共振回路、BLHは
入力波の共振回路RH1の回路素子と結合ループ９間の距
離および結合ループ９の面積等で定まる回路定数（サセ
プタンス）、BLVは出力波の共振回路RV1の回路素子と結
合ループ10間の距離および結合ループ10の面積等で定ま
る回路定数（サセプタンス）、BLHV1はモード結合調整
用金属螺子131、または141の管内挿入長に応じて定まる
回路定数（サセプタンス）で、回路定数BLH、BLVおよび
BLHV1の各値を適宜変化せしめることによって、主共振
器の伝送特性をワグナ形特性またはチェビシェフ形特性
等の任意の伝送特性とすることができる。8 and 9, the solid line with an arrow indicates an electric field, the broken line with an arrow indicates a magnetic field, and R in FIG.
Resonant circuit H1 is input wave, R V1 resonant circuit of the output wave, B LH circuit constant determined by the area and the like of the distance and the coupling loop 9 between coupling circuit elements of the resonant circuit R H1 of the input wave loop 9 (susceptance ), B LV is a circuit constant (susceptance) determined by the distance between the circuit element of the resonance circuit R V1 of the output wave and the coupling loop 10 and the area of the coupling loop 10, and B LHV1 is a metal screw 13 1 for mode coupling adjustment, or 14 Circuit constants (susceptances) determined according to the insertion length in the pipe of 1. The circuit constants B LH , B LV and
By appropriately changing each value of B LHV1 , the transmission characteristic of the main resonator can be set to an arbitrary transmission characteristic such as a Wagner type characteristic or a Chebyshev type characteristic.
主共振器のみから成る帯域通過ろ波器の伝送特性をワ
グナ形特性に形成した場合における伝送損失Ｌ（dB）
は、次式で求めることができる。Transmission loss L (dB) when the transmission characteristic of a band-pass filter consisting only of the main resonator is formed into a Wagner-type characteristic
Can be obtained by the following equation.
ｎは帯域通過ろ波器の次数で、本発明帯域通過ろ波器
を構成する主共振器の場合は、第10図に示すように、ｎ
＝２であるから、 fo ：共振周波数 ｆ ：任意の周波数 BW3 ：半値幅 チェビシェフ形特性に形成した場合における伝送損失
Ｌ（dB）は、次式で求められる。 n is the order of the band-pass filter, and in the case of the main resonator constituting the band-pass filter of the present invention, as shown in FIG.
= 2, f o : resonance frequency f: arbitrary frequency B W3 : half-width The transmission loss L (dB) in the case of forming a Chebyshev type characteristic can be obtained by the following equation.
S:許容定在波比（VSWR） Tn(x)はチェビシェフの多項式で、 この場合にもｎ＝２であるから、上式は、 BWr：許容リップルLrを与える通過帯域幅 通過帯域の許容リップルの大きさLrは、次式で求める
ことができる。 S: Allowable standing wave ratio (VSWR) T n (x) is a Chebyshev polynomial, Also in this case, since n = 2, the above equation becomes: B Wr : Pass band width that gives allowable ripple L r The allowable ripple magnitude L r of the pass band can be obtained by the following equation.
第12図は、主共振器の伝送特性をワグナ形に形成した
場合の特性曲線図の一例を示す図、第13図はチェビシェ
フ形に形成した場合の伝送特性の一例を示す曲線図で、
両図において、横軸は正規化リアクタンスｘ、縦軸は伝
送損失Ｌ（dB）である。 FIG. 12 is a diagram showing an example of a characteristic curve diagram when the transmission characteristic of the main resonator is formed in a Wagner shape, and FIG. 13 is a curve diagram showing an example of a transmission characteristic when the transmission characteristic is formed in a Chebyshev shape.
In both figures, the horizontal axis is the normalized reactance x, and the vertical axis is the transmission loss L (dB).
上記のように主共振器を単独で作動せしめた場合に
は、伝送特性がワグナ形特性またはチェビシェフ形特性
のいずれの場合においても、伝送波の群遅延時間特性は
従来と同様、第17図に一例を示すような特性となる。When the main resonator is operated alone as described above, the group delay time characteristic of the transmission wave is the same as in the conventional case in FIG. 17, regardless of whether the transmission characteristic is the Wagner type characteristic or the Chebyshev type characteristic. The characteristics are as shown in an example.
しかしながら、本発明帯域通過ろ波器においては主共
振器を単独で作動せしめることなく、シールドケースの
仕切壁14に穿った磁界結合孔15を介して補償用共振器を
励振し、補償用共振器側の共振周波数粗調整素子52の誘
電体共振素子22内への挿入長、共振周波数微調整用金属
螺子112および122ならびにモード結合調整用金属螺子13
2および142の各管内挿入長を調整することによって、群
遅延時間の補償を行うことができる。However, without allowed to operate the main resonator in the present invention the band-pass device alone, via a magnetic field coupling hole 15 bored in the partition wall 1 4 of the shield case exciting the compensation cavity, a compensation for resonance insertion length of the vessel side of the resonant frequency rough adjustment element 5 2 to the dielectric resonator element 2 in 2, the resonance frequency fine-adjusting metal screw 11 2 and 12 2 and mode coupling adjusting metal screw 13
By adjusting each tube insertion length of 2 and 14 2, it can be compensated for group delay time.
第11図は、主共振器および補償用共振器を伝送波に各
共振せしめた状態における本発明帯域通過ろ波器の等価
回路図で、RH2は補償用共振器側における入力波の共振
回路、RV2は補償用共振器側における出力波の共振回
路、BLHV2は補償用共振器側におけるモード結合調整用
金属螺子132または142の管内挿入長に応じて定まる回路
定数（サセプタンス）、Ｍは磁界結合係数で、他の符号
は第10図と同様である。FIG. 11 is an equivalent circuit diagram of the band-pass filter of the present invention in a state where the main resonator and the compensating resonator resonate with each other to the transmission wave, and R H2 is a resonance circuit of the input wave on the compensating resonator side. , R V2 resonant circuit of the output wave in the compensation for the resonator side, B LHV2 the circuit constant determined depending on the pipe insertion length of mode coupling adjusting metal screw 13 2 or 14 2 in the compensation cavity side (susceptance), M is a magnetic field coupling coefficient, and other symbols are the same as those in FIG.
本発明帯域通過ろ波器における群遅延時間の補償量
は、磁界結合孔15の直径に応じて定まる磁界結合量なら
びにモード結合調整用金属螺子132または142の各管内挿
入長によって定まる。Compensation amount of the group delay time in the present invention the band-pass device is determined by the magnetic field coupling amounts as well as the mode coupling adjusting metal screw 13 2 or 14 within each tube insertion length of 2 determined according to the diameter of the magnetic field coupling holes 15.
第14図ないし第16図は、本発明帯域通過ろ波器の試作
器における群遅延時間の補償量の実測値の一例をを示す
曲線図で、第14図は群遅延時間の補償量が不足の場合、
第15図は補償量が最適の場合、第16図は過補償の場合
で、各図における横軸は正規化周波数ｘ、縦軸は遅延時
間τ(x)である。14 to 16 are curve diagrams showing an example of measured values of the amount of compensation for the group delay time in the prototype of the band-pass filter of the present invention, and FIG. 14 shows an insufficient amount of compensation for the group delay time. in the case of,
FIG. 15 shows the case where the compensation amount is optimal, and FIG. 16 shows the case of overcompensation. In each figure, the horizontal axis is the normalized frequency x, and the vertical axis is the delay time τ (x) .
発明の効果 本発明は、主共振器とほぼ同様構成の補償用共振器を
主共振器に結合せしめ、両共振器の結合度を適当ならし
めるとともに、入力波および出力波に対する共振状態に
おいて、入力波および出力波間のモード結合度を適当に
調整することによって、通過帯域幅を広くなし得るとと
もに、群遅延時間を平坦ならしめることができ、ディジ
タル自動車電話の基地局における空中線共用装置の構成
素子等として好適である。Advantageous Effects of the Invention The present invention couples a compensating resonator having substantially the same configuration as the main resonator to the main resonator, makes the degree of coupling between the two resonators appropriate, and provides an input signal in a resonance state for an input wave and an output wave. By appropriately adjusting the degree of mode coupling between the wave and the output wave, the pass bandwidth can be widened and the group delay time can be flattened. It is suitable as.
第１図および第３図は、本発明の一実施例を示す断面
図、第２図は正面図、第４図ないし第６図は端面図、第
７図は背面図、第８図および第９図は、作動説明のため
の電磁界分布図、第10図および第11図は、作動説明のた
めの等価回路図、第12図および第13図は、伝送特性の一
例を示す曲線図、第14図ないし第16図は、本発明帯域通
過ろ波器の群遅延時間特性の一例を示す曲線図、第17図
は、従来の帯域通過ろ波器の群遅延時間特性の一例を示
す曲線図で、11：シールドケースの側壁、12および13：
シールドケースの端壁、14：シールドケースの仕切壁、
21および22：誘電体共振素子、31および32：共振素子の
支持部、4:止め螺子、51および52：共振周波数粗調整素
子、61および62：送り螺子、7:入力（または出力）端
子、8:出力（または入力）端子、9:入力（または出力）
結合素子、10:出力（または入力）結合素子、111,121,1
12および122：共振周波数微調整用金属螺子、131,141,1
32および142：モード結合調整用金属螺子、15:磁界結合
孔である。1 and 3 are sectional views showing an embodiment of the present invention, FIG. 2 is a front view, FIGS. 4 to 6 are end views, FIG. 7 is a rear view, FIG. 8 and FIG. FIG. 9 is an electromagnetic field distribution diagram for explaining operation, FIGS. 10 and 11 are equivalent circuit diagrams for explaining operation, FIGS. 12 and 13 are curve diagrams showing an example of transmission characteristics, 14 to 16 are curve diagrams showing an example of the group delay time characteristic of the bandpass filter of the present invention, and FIG. 17 is a curve showing an example of the group delay time characteristic of the conventional bandpass filter. in FIG, 1 1: side wall of the shielding case, 1 2 and 1 3:
The shield case of the end wall, 1 to 4: shield case of the partition wall,
2 1 and 2 2: dielectric resonance element, 3 1 and 3 2: support of the resonant element, 4: screwing, 5 1 and 5 2: resonance frequency rough adjustment element, 6 1 and 6 2: feed screw, 7 : Input (or output) terminal, 8: Output (or input) terminal, 9: Input (or output)
Coupling element, 10: output (or input) coupling element, 11 1 , 12 1 , 1
1 2 and 12 2 : Metal screw for fine adjustment of resonance frequency, 13 1 , 14 1 , 1
3 2 and 14 2: mode coupling adjusting metal screw, 15: magnetic field coupling hole.
Claims (5)
主共振器が、 有底筒状の第１のシールドケース内に同軸状に設けた筒
状の第１の誘電体共振素子と、 前記第１の誘電体共振素子内に同軸状に設けた可動誘電
体より成る第１の共振周波数粗調整素子と、 前記第１のシールドケースに取付けた入力結合素子およ
び出力結合素子と、 前記第１のシールドケースの側壁に設けられ、各軸方向
と前記シールドケースの中心軸を結ぶ中心角がほぼ90°
をなす第１および第２の共振周波数微調整用金属螺子
と、 前記第１のシールドケースの側壁に設けられ、軸方向
が、前記第１または第２の共振周波数微調整用金属螺子
の軸方向とほぼ45°またはほぼ135°の角度差を有する
第１のモード結合調整用金属螺子と、 前記第１のシールドケースの側壁に設けられ、軸方向
が、前記第１のモード結合調整用金属螺子の軸方向とほ
ぼ90°の角度差を有する第２のモード結合調整用金属螺
子とを備えて成り、 前記補償用共振器が、 前記第１のシールドケースと結合孔を介して結合された
有底筒状の第２のシールドケース内に同軸状に設けた第
２の誘電体共振素子と、 前記第２の誘電体共振素子内に同軸状に設けた可動誘電
体より成る第２の共振周波数粗調整素子と、 前記第２のシールドケースの側壁に設けられ、各軸方向
が、前記第１および第２の共振周波数微調整用金属螺子
の各軸方向にそれぞれほぼ一致する第３および第４の共
振周波数微調整用金属螺子と、 前記第２のシールドケースの側壁に設けられ、各軸方向
が、前記第１および第２のモード結合調整用用金属螺子
の各軸方向にほぼ一致する第３および第４のモード結合
調整用金属螺子とを備えて成ることを特徴とする群遅延
時間補償形帯域通過ろ波器。A first dielectric resonator element provided coaxially in a first shield case having a bottomed cylindrical shape, comprising: a main resonator; and a compensating resonator. A first resonance frequency coarse adjustment element made of a movable dielectric coaxially provided in the first dielectric resonance element; an input coupling element and an output coupling element attached to the first shield case; A central angle, which is provided on a side wall of the first shield case and connects each axis direction and a central axis of the shield case, is approximately 90 °.
A first and a second resonance frequency fine-adjustment metal screw, and an axial direction provided on a side wall of the first shield case, wherein an axial direction of the first or second resonance frequency fine-adjustment metal screw is A first mode coupling adjusting metal screw having an angle difference of approximately 45 ° or approximately 135 ° with the first mode coupling adjusting metal screw provided on a side wall of the first shield case, and having an axial direction. A second mode-coupling adjusting metal screw having an angle difference of about 90 ° with the axial direction. The compensating resonator is coupled to the first shield case via a coupling hole. A second dielectric resonance element coaxially provided in a second cylindrical bottom shield case; and a second resonance frequency comprising a movable dielectric coaxially provided in the second dielectric resonance element. A coarse adjustment element, provided on a side wall of the second shield case And third and fourth resonance frequency fine-tuning metal screws whose respective axial directions substantially coincide with the respective axial directions of the first and second resonance frequency fine-tuning metal screws; and the second shield. A third and a fourth mode coupling adjusting metal screw, each of which is provided on a side wall of the case and whose axial direction substantially matches each axial direction of the first and second mode coupling adjusting metal screws. A bandpass filter comprising a group delay time compensation type.
である請求項１に記載の群遅延時間補償形帯域通過ろ波
器。2. The group delay time compensating band-pass filter according to claim 1, wherein the contour of the cross section of the shield case is circular.
形である請求項１に記載の群遅延時間補償形帯域通過ろ
波器。3. The bandpass filter according to claim 1, wherein the cross-sectional shape of the shield case is octagonal.
および第２の共振周波数微調整用金属螺子の軸方向にほ
ぼ一致するループ面を有するループより成る請求項１に
記載の群遅延時間補償形帯域通過ろ波器。4. An input coupling element and an output coupling element, wherein:
2. The group delay time compensating band-pass filter according to claim 1, further comprising a loop having a loop surface substantially coincident with the axial direction of the second resonance frequency fine adjustment metal screw.
および第２の共振周波数微調整用金属螺子の軸方向にほ
ぼ一致する軸方向を有する容量結合用プローブより成る
請求項１に記載の群遅延時間補償形帯域通過ろ波器。5. An input coupling element and an output coupling element, wherein:
2. The group delay time compensation band-pass filter according to claim 1, further comprising a capacitive coupling probe having an axial direction substantially coincident with the axial direction of the second resonance frequency fine adjustment metal screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2232678A JP2854694B2 (en) | 1990-09-03 | 1990-09-03 | Bandpass filter with group delay time compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2232678A JP2854694B2 (en) | 1990-09-03 | 1990-09-03 | Bandpass filter with group delay time compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04117001A JPH04117001A (en) | 1992-04-17 |
| JP2854694B2 true JP2854694B2 (en) | 1999-02-03 |
Family
ID=16943080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2232678A Expired - Fee Related JP2854694B2 (en) | 1990-09-03 | 1990-09-03 | Bandpass filter with group delay time compensation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2854694B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5368867B2 (en) | 2008-04-23 | 2013-12-18 | 株式会社神戸製鋼所 | Al alloy film for display device, display device and sputtering target |
-
1990
- 1990-09-03 JP JP2232678A patent/JP2854694B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04117001A (en) | 1992-04-17 |
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