JPH0918210A - Tm multiple mode dielectric resonator - Google Patents
Tm multiple mode dielectric resonatorInfo
- Publication number
- JPH0918210A JPH0918210A JP16411695A JP16411695A JPH0918210A JP H0918210 A JPH0918210 A JP H0918210A JP 16411695 A JP16411695 A JP 16411695A JP 16411695 A JP16411695 A JP 16411695A JP H0918210 A JPH0918210 A JP H0918210A
- Authority
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- Prior art keywords
- dielectric
- frequency adjusting
- frequency
- adjusting hole
- mode
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の誘電体柱を交差
させてなる複合誘電体柱を周囲を導体で囲んだ空間内に
配したＴＭ多重モード誘電体共振器に関し、さらに詳し
くは、複合誘電体柱を構成する誘電体柱同士の結合度に
影響を与えることなく、個々の誘電体柱の周波数調整が
できるＴＭ多重モード誘電体共振器の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TM multimode dielectric resonator in which a composite dielectric column formed by intersecting a plurality of dielectric columns is arranged in a space surrounded by a conductor, and more specifically, The present invention relates to a structure of a TM multi-mode dielectric resonator capable of adjusting the frequency of each dielectric pillar without affecting the degree of coupling between the dielectric pillars forming the composite dielectric pillar.
【０００２】[0002]
【従来の技術】従来のＴＭ二重モード誘電体共振器を図
６に示す。図６はＴＭ二重モード誘電体共振器の構成を
示す分解斜視図である。図６に示すようにＴＭ二重モー
ド誘電体共振器１１は、複合誘電体柱１２、キャビティ
１３、金属パネル１４、周波数調整用誘電体棒１５とか
ら構成されている。2. Description of the Related Art A conventional TM dual mode dielectric resonator is shown in FIG. FIG. 6 is an exploded perspective view showing the structure of the TM dual mode dielectric resonator. As shown in FIG. 6, the TM dual mode dielectric resonator 11 is composed of a composite dielectric column 12, a cavity 13, a metal panel 14, and a frequency adjusting dielectric rod 15.
【０００３】キャビティ１３は、一体成型により複合誘
電体柱１２と同一の誘電体材料で形成され、キャビティ
１３の上下面と左右側面には導体１６が形成されてい
る。また、キャビティ１３の二つの開口は金属パネル１
４で覆われ、金属パネル１４は導体１６と電気的に接続
される。The cavity 13 is formed of the same dielectric material as the composite dielectric column 12 by integral molding, and conductors 16 are formed on the upper and lower surfaces and the left and right side surfaces of the cavity 13. The two openings of the cavity 13 are the metal panel 1
4, the metal panel 14 is electrically connected to the conductor 16.
【０００４】複合誘電体柱１２は二本の角柱状の誘電体
柱１２ａ、１２ｂを一体に複合して十字形状に形成され
ており、各誘電体柱１２ａ、１２ｂの交差部には結合用
切欠部１７が形成されている。また、各誘電体柱１２
ａ、１２ｂには各誘電体柱の軸方向に垂直な方向にそれ
ぞれ周波数調整用孔１８を設けている。この周波数調整
用孔１８には、周波数調整用誘電体棒１５が挿抜自在と
なるように金属パネル１４で保持される。The composite dielectric pillar 12 is formed into a cross shape by integrally combining two prismatic dielectric pillars 12a and 12b, and a notch for coupling is formed at the intersection of the dielectric pillars 12a and 12b. The part 17 is formed. In addition, each dielectric pillar 12
Frequency adjustment holes 18 are provided in a and 12b in a direction perpendicular to the axial direction of each dielectric pillar. The frequency adjusting hole 18 is held by the metal panel 14 so that the frequency adjusting dielectric rod 15 can be inserted and removed.
【０００５】この時、誘電体柱１２ａの電磁界と誘電体
柱１２ｂの電磁界とが結合用切欠部１７により結合して
いると、複合誘電体柱１２にはｆeven（偶モードの共振
周波数）およびｆodd （奇モードの共振周波数）の二つ
の共振周波数が生じる。ここでは、低い方の共振周波数
をｆevenとし、高い方の共振周波数をｆodd とする。At this time, when the electromagnetic field of the dielectric column 12a and the electromagnetic field of the dielectric column 12b are coupled by the coupling notch 17, the composite dielectric column 12 has f even (resonance frequency of even mode). ) And f odd (odd mode resonance frequency). Here, the lower resonance frequency is f even and the higher resonance frequency is f odd .
【０００６】図７は、ＴＭ二重モード誘電体共振器１１
の電界を示す図であり、実線の矢印はｆevenの電気力線
を表し、破線の矢印はｆodd の電気力線を表す。FIG. 7 shows a TM dual mode dielectric resonator 11
Is a diagram showing the electric field of the electric field, and the solid line arrow represents the electric field line of f even , and the broken line arrow represents the electric field line of f odd .
【０００７】そして、結合係数はｆevenとｆodd の周波
数差によって決定される。したがって、ｆevenとｆodd
の周波数差が０の場合、結合係数が０となって、誘電体
柱１２ａと誘電体柱１２ｂとが結合しない。また、ｆ
evenとｆodd の周波数差が大きければ大きいほど結合係
数は大きくなる。このとき、ｆevenとｆodd の周波数は
図７に示す電気力線の経路に影響されて変化し、結合係
数も同様に変化する。The coupling coefficient is determined by the frequency difference between f even and f odd . Therefore, f even and f odd
When the frequency difference is 0, the coupling coefficient becomes 0, and the dielectric columns 12a and 12b are not coupled. Also, f
The larger the frequency difference between even and f odd, the larger the coupling coefficient. At this time, the frequencies of f even and f odd change under the influence of the paths of the lines of electric force shown in FIG. 7, and the coupling coefficient also changes.
【０００８】[0008]
【発明が解決しようとする課題】ところで、従来は上記
したように誘電体柱の周波数を調整するために周波数調
整用孔を形成し、周波数調整用孔に周波数調整用誘電体
棒を挿抜することによって行っていたが、周波数調整用
孔を設けることによって、誘電体柱同士の結合係数が変
化するという問題点があった。By the way, conventionally, as described above, a frequency adjusting hole is formed for adjusting the frequency of the dielectric pillar, and the frequency adjusting dielectric rod is inserted into and removed from the frequency adjusting hole. However, there is a problem that the coupling coefficient between the dielectric columns is changed by providing the frequency adjusting hole.
【０００９】これは、各誘電体柱に周波数調整用孔を形
成した際に、ｆevenとｆodd の電界に与える影響に差が
あるからである。This is because there is a difference in the influence on the electric fields of f even and f odd when the frequency adjusting hole is formed in each dielectric pillar.
【００１０】通常、周波数調整用孔を形成するとｆeven
及びｆodd はともに高くなる。この時、周波数調整用孔
によってｆevenとｆodd とが同じ程度高くなるのであれ
ば、ｆevenとｆodd の周波数差は変化せず、結合係数も
変化しない。Usually, when the frequency adjusting hole is formed, f even
And f odd are both high. At this time, if f even and f odd are increased by the frequency adjusting hole to the same extent, the frequency difference between f even and f odd does not change, and the coupling coefficient does not change.
【００１１】ｆodd に比べてｆevenの方が周波数調整用
孔の影響が大きい場合、図８に示すように、周波数調整
用誘電体棒を挿入していない時は、ｆevenが高くなるた
めｆoddに近づき周波数差が小さくなって結合係数も小
さくなり、周波数調整用誘電体棒を挿入した時は、ｆ
odd に比べてｆevenの方が周波数が低くなる程度が大き
く結合係数が大きくなる。すなわち、周波数調整用誘電
体棒の挿抜により大きく結合係数が変化する。When f even has a greater influence on the frequency adjusting hole than f odd , as shown in FIG. 8, f even becomes higher when the frequency adjusting dielectric rod is not inserted. coupling coefficient frequency difference becomes smaller closer to f odd also reduced, when inserting the frequency adjusting dielectric rod, f
Compared to odd , f even has a lower frequency and a larger coupling coefficient. That is, the coupling coefficient greatly changes due to the insertion and removal of the frequency adjusting dielectric rod.
【００１２】逆に、ｆevenに比べてｆodd の方が周波数
調整用孔の影響が大きい場合、図９に示すように、周波
数調整用誘電体棒を挿入していない時は、ｆodd が高く
なるためｆevenから離れて周波数差が大きくなって結合
係数も大きくなり、周波数調整用誘電体棒を挿入した時
は、ｆevenに比べてｆodd の方が周波数が低くなる程度
が大きく結合係数が小さくなる。すなわち、周波数調整
用誘電体棒の挿抜により大きく結合係数が変化する。On the contrary, when f odd has a greater influence on the frequency adjusting hole than f even , as shown in FIG. 9, when the frequency adjusting dielectric rod is not inserted, f odd is Since it becomes higher, the frequency difference becomes larger apart from f even, and the coupling coefficient also becomes larger. When the frequency adjusting dielectric rod is inserted, the frequency of f odd is lower than that of f even. The coefficient becomes smaller. That is, the coupling coefficient greatly changes due to the insertion and removal of the frequency adjusting dielectric rod.
【００１３】周波数調整用孔がｆevenとｆodd に与える
影響はそれぞれの電界にどれだけ影響を与えるかによ
る。すなわち、周波数調整用孔がｆevenとｆodd の電気
力線をどのように遮断するかによる。The effect of the frequency adjusting holes on f even and f odd depends on how much they affect each electric field. That is, it depends on how the frequency adjusting holes block the lines of electric force of f even and f odd .
【００１４】図７に示すように、ｆevenでは一方の電気
力線が周波数調整用孔を２つ横切り、他方の電気力線が
周波数調整用孔を横切らないのに対して、ｆodd は一方
の電気力線が周波数調整用孔を１つ横切り、他方の電気
力線も周波数調整用孔を１つ横切っている。As shown in FIG. 7, in f even , one electric force line crosses two frequency adjustment holes, and the other electric force line does not cross the frequency adjustment hole, whereas f odd is one. Of the electric force line crosses one frequency adjustment hole, and the other electric line of force also crosses one frequency adjustment hole.
【００１５】この時、ｆevenとｆodd をともに電気力線
全体で見た場合、電気力線が周波数調整用孔を横切る数
としてみれば同じではあるが、実際にはｆevenとｆodd
における実効誘電率の違いにより、ｆevenとｆodd の両
方にバランス良く影響を与えられていなかった。At this time, when both f even and f odd are viewed in the whole electric force line, it is the same as the number of electric force lines crossing the frequency adjusting hole, but in fact, f even and f odd are actually the same.
Due to the difference in the effective permittivity in (3), both f even and f odd were not affected in a well-balanced manner.
【００１６】したがって、ＴＭ多重モード誘電体共振器
の周波数を変化させるために周波数調整用孔を形成して
周波数調整用誘電体棒を挿抜自在に取り付けた時、周波
数とともに、ｆeven及びｆodd の結合係数まで変化する
ことが避けられなかった。Therefore, when the frequency adjusting hole is formed to change the frequency of the TM multi-mode dielectric resonator and the frequency adjusting dielectric rod is detachably attached, the frequency and f even and f odd are It was unavoidable that the coupling coefficient changed.
【００１７】このような場合、結合係数を調整するため
には、ＴＭ多重モード誘電体共振器に新たに金属ねじ等
の結合調整用の機構を形成する必要があり、時間及びコ
ストがかかることとなっていた。In such a case, in order to adjust the coupling coefficient, it is necessary to newly form a mechanism for coupling adjustment such as a metal screw in the TM multimode dielectric resonator, which requires time and cost. Was becoming.
【００１８】本発明は、これらの問題点を鑑みてなされ
たもので、複合誘電体柱を構成する各誘電体柱に周波数
調整用孔を形成し、周波数調整用誘電体棒を挿抜するこ
とにより周波数調整を行っても、結合係数に影響を与え
ることのないＴＭ多重モード誘電体共振器を提供するこ
とを目的とする。The present invention has been made in view of these problems, and by forming a frequency adjusting hole in each of the dielectric columns forming the composite dielectric column and inserting and removing the frequency adjusting dielectric rod. It is an object of the present invention to provide a TM multimode dielectric resonator that does not affect the coupling coefficient even if the frequency is adjusted.
【００１９】[0019]
【課題を解決するための手段】そこで、請求項１に係る
発明では、周囲を導体で囲んだ空間内に複数の誘電体柱
を交差させてなる複合誘電体柱を配し、複合誘電体柱を
構成する誘電体柱に、共振時に生じる電界の方向に垂直
な方向に周波数調整用孔を形成し、周波数調整用孔に周
波数調整用誘電体棒を挿抜自在に保持してなるＴＭ多重
モード誘電体共振器であって、周波数調整用孔を共振時
に生じる複数のモードの電気力線が通る位置に形成し、
複数のモードのうち少なくとも一つのモードの電気力線
の方向における周波数調整用誘電体棒と周波数調整用孔
とにより生じる誘電率と、複数のモードのうち他の少な
くとも一つのモードの電気力線の方向における周波数調
整用誘電体棒と周波数調整用孔とにより生じる誘電率と
を異ならせたことにより、前記周波数調整用棒を挿抜し
た際の少なくとも一つのモードの共振周波数と他の少な
くとも一つのモードの共振周波数との間の周波数差が一
定となるようにしている。Therefore, in the invention according to claim 1, a composite dielectric pillar formed by intersecting a plurality of dielectric pillars is arranged in a space surrounded by conductors, and the composite dielectric pillar is provided. A TM multimode dielectric in which a frequency adjusting hole is formed in a dielectric column that constitutes a structure in a direction perpendicular to a direction of an electric field generated at the time of resonance, and the frequency adjusting dielectric rod is detachably held in the frequency adjusting hole. In the body resonator, the frequency adjusting hole is formed at a position where electric lines of force of a plurality of modes generated at the time of resonance pass.
Of the dielectric constant produced by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric force line of at least one mode of the plurality of modes, and the electric force line of at least one other mode of the plurality of modes. By changing the dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction, the resonance frequency of at least one mode and the other at least one mode when the frequency adjusting rod is inserted and removed. The frequency difference from the resonance frequency is constant.
【００２０】また、請求項２に係る発明では、周波数調
整用孔の断面形状と周波数調整用誘電体棒の断面形状と
を異ならせることにより、複数のモードのうち少なくと
も一つのモードの電気力線の方向における周波数調整用
誘電体棒と周波数調整用孔とにより生じる誘電率と、複
数のモードのうち他の少なくとも一つのモードの電気力
線の方向における周波数調整用誘電体棒と周波数調整用
孔とにより生じる誘電率とを異ならせている。In the invention according to claim 2, the frequency adjusting hole and the frequency adjusting dielectric rod have different cross-sectional shapes, so that at least one mode of the plurality of modes of electric force lines is selected. , And the dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole, and the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric flux line of at least one of the plurality of modes. And the permittivity caused by and are different.
【００２１】さらに、請求項３に係る発明では、周波数
調整用孔の内周面を一つのモードの電気力線の方向に沿
って拡張して空隙部を形成することにより、複数のモー
ドのうち少なくとも一つのモードの電気力線の方向にお
ける周波数調整用誘電体棒と周波数調整用孔とにより生
じる誘電率と、複数のモードのうち他の少なくとも一つ
のモードの電気力線の方向における周波数調整用誘電体
棒と周波数調整用孔とにより生じる誘電率とを異ならせ
ている。Further, in the invention according to claim 3, among the plurality of modes, the inner peripheral surface of the frequency adjusting hole is expanded along the direction of the electric force line of one mode to form a void. Dielectric constant generated by the frequency adjusting dielectric rod and frequency adjusting hole in the direction of the electric force line of at least one mode, and frequency adjusting in the direction of the electric force line of at least one of the plurality of modes The dielectric constant generated by the dielectric rod and the frequency adjusting hole is made different.
【００２２】そして、請求項４に係る発明では、周波数
調整用孔の中心軸に対して周波数調整用誘電体棒の中心
軸を偏心させることにより、複数のモードのうち少なく
とも一つのモードの電気力線の方向における周波数調整
用誘電体棒と周波数調整用孔とにより生じる誘電率と、
複数のモードのうち他の少なくとも一つのモードの電気
力線の方向における周波数調整用誘電体棒と周波数調整
用孔とにより生じる誘電率とを異ならせている。In the invention according to claim 4, the center axis of the frequency adjusting dielectric rod is eccentric with respect to the center axis of the frequency adjusting hole, so that the electric force of at least one mode among the plurality of modes is increased. The dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the line,
The dielectric constants generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the lines of electric force of at least one of the plurality of modes are different.
【００２３】[0023]
【作用】請求項１に係る発明によれば、周波数調整用孔
を共振時に生じる複数のモードの電気力線が通る位置に
形成し、複数のモードのうち少なくとも一つのモードの
電気力線の方向における周波数調整用誘電体棒と周波数
調整用孔とにより生じる誘電率と、複数のモードのうち
他の少なくとも一つのモードの電気力線の方向における
周波数調整用誘電体棒と周波数調整用孔とにより生じる
誘電率とを異ならせたことにより、少なくとも一つのモ
ードの共振周波数と他の少なくとも一つのモードの共振
周波数との間の周波数差を一定にすることができる。According to the first aspect of the present invention, the frequency adjusting hole is formed at a position where electric lines of force of a plurality of modes generated at the time of resonance pass, and the direction of the electric lines of force of at least one mode among the plurality of modes. And the dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole in, and the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric flux line of at least one of the plurality of modes. By making the generated dielectric constants different from each other, the frequency difference between the resonance frequency of at least one mode and the resonance frequency of at least another mode can be made constant.
【００２４】請求項２に係る発明によれば、周波数調整
用孔の断面形状と周波数調整用誘電体棒の断面形状とを
異ならせているので、複数のモードのうち少なくとも一
つのモードの電気力線の方向における周波数調整用誘電
体棒と周波数調整用孔とにより生じる誘電率と、複数の
モードのうち他の少なくとも一つのモードの電気力線の
方向における周波数調整用誘電体棒と前記周波数調整用
孔とにより生じる誘電率とを容易に異ならせることがで
きる。According to the second aspect of the present invention, since the cross-sectional shape of the frequency adjusting hole and the cross-sectional shape of the frequency adjusting dielectric rod are made different, the electric force of at least one mode among the plurality of modes is set. Dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the line, and the frequency adjusting dielectric rod and the frequency adjusting in the direction of the electric force line of at least one of the plurality of modes The dielectric constant caused by the use hole can be easily made different.
【００２５】請求項３に係る発明によれば、周波数調整
用孔を一つのモードの電気力線の方向に沿って拡張し空
隙部を形成しているので、複数のモードのうち少なくと
も一つのモードの電気力線の方向における周波数調整用
誘電体棒と周波数調整用孔とにより生じる誘電率と、複
数のモードのうち他の少なくとも一つのモードの電気力
線の方向における周波数調整用誘電体棒と周波数調整用
孔とにより生じる誘電率とを容易に異ならせることがで
き、少なくとも一つのモードあるいは他の少なくとも一
つの電気力線だけを選択してより影響を与えることがで
きる。According to the invention of claim 3, since the frequency adjusting hole is expanded along the direction of the electric flux line of one mode to form the void portion, at least one mode of the plurality of modes is formed. A dielectric constant produced by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric force line, and a frequency adjusting dielectric rod in the direction of the electric force line of at least one of the plurality of modes. The permittivity generated by the frequency adjusting hole can be easily made different, and at least one mode or at least one other electric force line can be selected to have more influence.
【００２６】請求項４に係る発明によれば、周波数調整
用孔の中心軸に対して周波数調整用誘電体棒の中心軸を
偏心させているので、複数のモードのうち少なくとも一
つのモードの電気力線の方向における周波数調整用誘電
体棒と周波数調整用孔とにより生じる誘電率と、複数の
モードのうち他の少なくとも一つのモードの電気力線の
方向における周波数調整用誘電体棒と周波数調整用孔と
により生じる誘電率とを容易に異ならせることができ
る。According to the fourth aspect of the present invention, since the central axis of the frequency adjusting dielectric rod is eccentric with respect to the central axis of the frequency adjusting hole, at least one of the plurality of modes is electrically operated. Dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the force line, and frequency adjusting dielectric rod and frequency adjusting in the direction of the electric force line of at least one of the plurality of modes The dielectric constant caused by the use hole can be easily made different.
【００２７】[0027]
【実施例】以下、本発明の第１の実施例に係る誘電体共
振器を図１、図２を用いて説明する。図１はＴＭ二重モ
ード誘電体共振器の構成を示す分解斜視図である。図１
に示すようにＴＭ二重モード誘電体共振器１は、複合誘
電体柱２、キャビティ３、金属パネル４、周波数調整用
誘電体棒５とから構成されている。EXAMPLE A dielectric resonator according to a first example of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is an exploded perspective view showing the structure of the TM dual mode dielectric resonator. FIG.
As shown in, the TM dual mode dielectric resonator 1 is composed of a composite dielectric column 2, a cavity 3, a metal panel 4, and a frequency adjusting dielectric rod 5.
【００２８】キャビティ３は、一体成型により複合誘電
体柱２と同一の誘電体材料で形成され、キャビティ３の
上下面と左右側面には導体６が形成されている。また、
キャビティ３の二つの開口は金属パネル４で覆われ、金
属パネル４は導体６と電気的に接続される。The cavity 3 is formed of the same dielectric material as the composite dielectric pillar 2 by integral molding, and conductors 6 are formed on the upper and lower surfaces and the left and right side surfaces of the cavity 3. Also,
The two openings of the cavity 3 are covered with a metal panel 4, which is electrically connected to the conductor 6.
【００２９】複合誘電体柱２は二本の角柱状の誘電体柱
２ａ、２ｂを一体に複合して十字形状に形成されてお
り、各誘電体柱２ａ、２ｂの交差部には結合用切欠部７
が形成されている。また、各誘電体柱２ａ、２ｂには各
誘電体柱の軸方向に垂直な方向にそれぞれ周波数調整用
孔８を設けている。この周波数調整用孔８には、周波数
調整用誘電体棒７が挿抜自在となるように金属パネル４
で保持される。The composite dielectric pillar 2 is formed in a cross shape by integrally combining two prismatic dielectric pillars 2a and 2b, and a notch for coupling is formed at the intersection of the dielectric pillars 2a and 2b. Part 7
Are formed. Further, each dielectric pillar 2a, 2b is provided with a frequency adjusting hole 8 in a direction perpendicular to the axial direction of each dielectric pillar. The frequency adjusting hole 8 allows the frequency adjusting dielectric rod 7 to be inserted and removed freely.
Is held.
【００３０】本実施例の周波数調整用孔８は図６、図７
に示す従来の周波数調整用孔１８と異なり、断面方向か
ら見て円形状の孔ではなく、円形状の孔に長方形状の空
隙部８ａ、８ｂを形成している。The frequency adjusting hole 8 of this embodiment is shown in FIGS.
Unlike the conventional frequency adjusting hole 18 shown in FIG. 3, rectangular voids 8a and 8b are formed in a circular hole instead of a circular hole when viewed from the cross-sectional direction.
【００３１】図２は本実施例のＴＭ二重モード誘電体共
振器１をキャビティ３の開口側から見たＴＭ二重モード
誘電体共振器１の電界を示す図であり、実線の矢印はｆ
evenの電気力線を表し、破線はｆodd の電気力線を表
す。FIG. 2 is a diagram showing the electric field of the TM double-mode dielectric resonator 1 of the present embodiment as seen from the opening side of the cavity 3, and the solid arrow indicates f.
The even lines of electric force are shown, and the broken lines show the electric lines of force odd .
【００３２】図２に示すように、本実施例では周波数調
整用孔８の空隙部８ａ、８ｂをｆevenの電気力線の方向
に沿って形成している。また、周波数調整用誘電体棒５
は周波数調整用孔８の円形状部分に対応する円筒状に形
成されている。これは、従来の図８に示すｆodd に比べ
てｆevenの方が周波数調整用孔の影響が大きい場合に対
応するためのものである。As shown in FIG. 2, in this embodiment, the void portions 8a and 8b of the frequency adjusting hole 8 are formed along the direction of the electric flux line of f even . Also, the frequency adjusting dielectric rod 5
Is formed in a cylindrical shape corresponding to the circular portion of the frequency adjusting hole 8. This is to cope with the case where f even has a greater influence of the frequency adjustment hole than the conventional f odd shown in FIG.
【００３３】すなわち、周波数調整用孔８に周波数調整
用誘電体棒５を挿入すると、ちょうど空隙部８ａ、８ｂ
がエアギャップとなり、ｆodd の電気力線よりｆevenの
電気力線の方に強く影響を与えることができる。That is, when the frequency adjusting dielectric rod 5 is inserted into the frequency adjusting hole 8, just the voids 8a and 8b are formed.
Is an air gap, and the electric field lines of f even can be more strongly influenced than the electric field lines of f odd .
【００３４】すなわち、従来の図８に示すｆodd 及びｆ
evenの周波数差を、図３に示すように、周波数調整用誘
電体棒を挿入していない時のｆevenとｆodd の周波数差
と、周波数調整用誘電体棒を挿入した時のｆevenとｆ
odd の周波数差とがほぼ同程度となるようにしているの
で、周波数調整用誘電体棒の挿抜により結合係数がほと
んど変化しない。That is, f odd and f shown in FIG.
As shown in FIG. 3, the even frequency difference is expressed as f even and f odd when the frequency adjusting dielectric rod is not inserted, and f even when the frequency adjusting dielectric rod is inserted. f
Since the odd frequency difference is set to be approximately the same, the coupling coefficient hardly changes when the frequency adjusting dielectric rod is inserted and removed.
【００３５】逆に、ｆevenに比べてｆodd の方が周波数
調整用孔の影響が大きい場合には、ｆodd の電気力線の
方向に沿って周波数調整用孔に空隙部を形成すればよ
い。On the contrary, when the influence of the frequency adjustment hole is greater in f odd than in f even , if a void is formed in the frequency adjustment hole along the direction of the electric flux line of f odd. Good.
【００３６】なお、本実施例では、周波数調整用孔８の
断面形状を円形状に長方形状の空隙部８ａ、８ｂを加え
た形状にしていたがこれに限るものではない。In the present embodiment, the frequency adjusting hole 8 has a circular cross section with the rectangular voids 8a and 8b added, but the present invention is not limited to this.
【００３７】図４は本発明の第１の実施例の変形例を示
す図であり、周波数調整用孔部分を拡大した正面図であ
る。図４（Ａ）〜（Ｅ）に示すように、周波数調整用孔
２８、３８、４８、５８、６８の断面形状と、周波数調
整用棒２５、３５、４５、５５、６５の断面形状とを異
ならせることにより、空隙部２８ａ、２８ｂ、３８ａ、
４８ａ、４８ｂ、５８ａ、５８ｂ、６８ａを形成してい
る。これにより、図１、図２に示す第１の実施例と同様
の効果を得ることができる。FIG. 4 is a view showing a modification of the first embodiment of the present invention and is an enlarged front view of the frequency adjusting hole portion. As shown in FIGS. 4A to 4E, the sectional shapes of the frequency adjusting holes 28, 38, 48, 58 and 68 and the sectional shapes of the frequency adjusting rods 25, 35, 45, 55 and 65 are shown. By making them different, the voids 28a, 28b, 38a,
48a, 48b, 58a, 58b and 68a are formed. As a result, the same effect as that of the first embodiment shown in FIGS. 1 and 2 can be obtained.
【００３８】図４（Ｆ）に示すのは、周波数調整用孔７
８の断面形状と周波数調整用誘電体棒７５の断面形状と
を相似の楕円にして、周波数調整用孔７８の長径の向き
と周波数調整用誘電体棒７５の長径の向きとを変えるこ
とにより、空隙部７８ａ、７８ｂを形成したものであ
る。このようにすることにより、図１、図２に示す第１
の実施例と同様の効果を得ることができる。FIG. 4F shows the frequency adjusting hole 7
By making the cross-sectional shape of 8 and the cross-sectional shape of the frequency adjusting dielectric rod 75 similar to each other and changing the major axis direction of the frequency adjusting hole 78 and the major axis direction of the frequency adjusting dielectric rod 75, The voids 78a and 78b are formed. By doing so, the first unit shown in FIGS.
The same effect as that of the embodiment can be obtained.
【００３９】また、ここに示す組み合わせだけでなく、
要はｆevenの電気力線の方向における周波数調整用孔と
周波数調整用誘電体棒により生じる誘電率と、ｆodd 電
気力線の方向における周波数調整用孔と周波数調整用誘
電体棒とにより生じる誘電率とを異ならせることができ
る組み合わせであればよい。In addition to the combinations shown here,
The point is that the dielectric constant is generated by the frequency adjusting hole and the frequency adjusting dielectric rod in the direction of the electric flux line of f even , and is generated by the frequency adjusting hole and the frequency adjusting dielectric rod in the direction of the f odd electric force line. Any combination can be used as long as it has a different permittivity.
【００４０】図５は本発明の第２の実施例を示す図であ
り、周波数調整用孔部分を拡大した正面図である。図５
に示すように、周波数調整用孔８８の断面形状と周波数
調整用誘電体棒８５の断面形状を同一の円形状にすると
ともに、周波数調整用孔８８の中心軸に対して周波数調
整用誘電体棒８５の中心軸を偏心させて、空隙部８８ａ
を形成し、ｆevenの電気力線の方向における周波数調整
用孔と周波数調整用誘電体棒とにより生じる誘電率とｆ
odd の電気力線の方向における周波数調整用孔と周波数
調整用誘電体棒とにより生じる誘電率とを異ならせてい
る。これにより、ｆevenとｆodd の周波数差をほぼ一定
に調整することができ、周波数調整用誘電体棒を挿抜し
ても、結合係数が大きく変化しない。FIG. 5 is a view showing a second embodiment of the present invention and is an enlarged front view of the frequency adjusting hole portion. FIG.
As shown in FIG. 7, the frequency adjusting hole 88 and the frequency adjusting dielectric rod 85 have the same circular cross-sectional shape, and the frequency adjusting dielectric rod 85 is arranged with respect to the center axis of the frequency adjusting hole 88. The central axis of 85 is eccentric, and the void 88a is formed.
And the dielectric constant and f generated by the frequency adjusting hole and the frequency adjusting dielectric rod in the direction of the electric flux line of f even.
The dielectric constants generated by the frequency adjusting holes and the frequency adjusting dielectric rods in the directions of the odd electric lines of force are different. As a result, the frequency difference between f even and f odd can be adjusted to be substantially constant, and the coupling coefficient does not change significantly even when the frequency adjusting dielectric rod is inserted and removed.
【００４１】本実施例では、周波数調整用孔の断面形状
と周波数調整用誘電体棒の断面形状とを同一の円形状に
したがこれに限るものではなく、多角形状でもよく、ま
た、断面形状の異なる周波数調整用孔と周波数調整用誘
電体棒の中心軸を偏心させてもよい。要は周波数調整用
孔の中心軸に対して周波数調整用誘電体棒の中心軸を偏
心させることにより、ｆevenの電気力線の方向における
周波数調整用孔と周波数調整用誘電体棒とにより生じる
誘電率とｆodd の電気力線の方向における周波数調整用
孔と周波数調整用誘電体棒とにより生じる誘電率とを異
ならせることができればよい。In this embodiment, the sectional shape of the frequency adjusting hole and the sectional shape of the frequency adjusting dielectric rod are the same circular shape, but the present invention is not limited to this, and it may be a polygonal shape, or the sectional shape. The center axes of the frequency adjusting hole and the frequency adjusting dielectric rod different from each other may be eccentric. The point is that by eccentricizing the central axis of the frequency adjusting dielectric rod with respect to the central axis of the frequency adjusting hole, it is caused by the frequency adjusting hole and the frequency adjusting dielectric rod in the direction of the electric flux line of f even. It suffices that the permittivity and the permittivity generated by the frequency adjusting hole and the frequency adjusting dielectric rod in the direction of the electric line of force of odd be different.
【００４２】なお、本発明では第１の実施例及び第２の
実施例ともにＴＭ二重モード誘電体共振器を用いて説明
したが、本発明はこれに限らず、複数の誘電体柱を交差
させてなる複合誘電体柱を周囲を導体で囲んだ空間内に
配したＴＭ多重モード誘電体共振器すべてに対応でき
る。In the present invention, both the first and second embodiments have been described using the TM dual mode dielectric resonator, but the present invention is not limited to this, and a plurality of dielectric columns are crossed. It can be applied to all TM multi-mode dielectric resonators in which the composite dielectric column thus formed is arranged in a space surrounded by a conductor.
【００４３】[0043]
【発明の効果】本発明に係るＴＭ多重モード誘電体共振
器によれば、一つのモードと他のモードの周波数を調整
することができ、周波数調整用誘電体棒を挿抜すること
によって周波数調整をした際に、結合係数が大きく変化
することを抑止することができる。また、周波数調整用
孔もしくは周波数調整用誘電体棒を加工するだけなの
で、周波数調整の時間が掛からず、コストも低くおさえ
ることができる。According to the TM multimode dielectric resonator of the present invention, the frequencies of one mode and the other mode can be adjusted, and the frequency can be adjusted by inserting and removing the frequency adjusting dielectric rod. In this case, it is possible to prevent the coupling coefficient from greatly changing. Further, since only the frequency adjusting hole or the frequency adjusting dielectric rod is processed, the frequency adjusting does not take time and the cost can be kept low.
【図１】第１の実施例に係るＴＭ二重モード誘電体共振
器の構成を示す分解斜視図である。FIG. 1 is an exploded perspective view showing a configuration of a TM double mode dielectric resonator according to a first embodiment.
【図２】第１の実施例に係るＴＭ二重モード誘電体共振
器の電界分布を示す正面図である。FIG. 2 is a front view showing an electric field distribution of the TM double mode dielectric resonator according to the first embodiment.
【図３】第１の実施例に係るＴＭ二重モード誘電体共振
器のｆevenおよびｆodd と結合係数の関係を示す正面図
である。FIG. 3 is a front view showing the relationship between f even and f odd and the coupling coefficient of the TM double mode dielectric resonator according to the first embodiment.
【図４】第１の実施例に係るＴＭ二重モード誘電体共振
器の周波数調整用孔の変形例を示す周波数調整用孔部分
の拡大正面図である。FIG. 4 is an enlarged front view of a frequency adjusting hole portion showing a modification of the frequency adjusting hole of the TM double mode dielectric resonator according to the first embodiment.
【図５】第２の実施例に係るＴＭ二重モード誘電体共振
器の周波数調整用孔部分の拡大正面図である。FIG. 5 is an enlarged front view of a frequency adjusting hole portion of the TM double mode dielectric resonator according to the second embodiment.
【図６】従来のＴＭ二重モード誘電体共振器の構成を示
す分解斜視図である。FIG. 6 is an exploded perspective view showing a configuration of a conventional TM dual mode dielectric resonator.
【図７】従来のＴＭ二重モード誘電体共振器の電界分布
を示す正面図である。FIG. 7 is a front view showing an electric field distribution of a conventional TM dual mode dielectric resonator.
【図８】従来のＴＭ二重モード誘電体共振器のｆevenお
よびｆodd と結合係数の関係を示す正面図である。FIG. 8 is a front view showing a relationship between a coupling coefficient and f even and f odd of a conventional TM dual mode dielectric resonator.
【図９】従来の他のＴＭ二重モード誘電体共振器のｆ
evenおよびｆodd と結合係数の関係を示す正面図であ
る。FIG. 9: f of another conventional TM dual-mode dielectric resonator
It is a front view which shows the relationship between even and f odd, and a coupling coefficient.
１ ＴＭ二重モード誘電体共振器 ２ 複合誘電体柱 ２ａ、２ｂ 誘電体柱 ３ キャビティ ４ 金属パネル ５ 周波数調整用誘電体棒 ６ 導体 ７ 結合用切欠部 ８ 周波数調整用孔 ８ａ、８ｂ 空隙部 1 TM Double Mode Dielectric Resonator 2 Composite Dielectric Pillar 2a, 2b Dielectric Pillar 3 Cavity 4 Metal Panel 5 Frequency Adjusting Dielectric Rod 6 Conductor 7 Coupling Notch 8 Frequency Adjusting Hole 8a, 8b Void
Claims (4)
柱を交差させてなる複合誘電体柱を配し、前記複合誘電
体柱を構成する誘電体柱に、共振時に生じる電界の方向
に垂直な方向に周波数調整用孔を形成し、該周波数調整
用孔に周波数調整用誘電体棒を挿抜自在に保持してなる
ＴＭ多重モード誘電体共振器であって、 前記周波数調整用孔を共振時に生じる複数のモードの電
気力線が通る位置に形成し、複数のモードのうち少なく
とも一つのモードの電気力線の方向における前記周波数
調整用誘電体棒と前記周波数調整用孔とにより生じる誘
電率と、複数のモードのうち他の少なくとも一つのモー
ドの電気力線の方向における前記周波数調整用誘電体棒
と前記周波数調整用孔とにより生じる誘電率とを異なら
せたことにより、前記周波数調整用棒を挿抜した際の前
記少なくとも一つのモードの共振周波数と他の少なくと
も一つのモードの共振周波数との間の周波数差が一定と
なるようにしたことを特徴とするＴＭ多重モード誘電体
共振器。1. A composite dielectric pillar formed by intersecting a plurality of dielectric pillars in a space surrounded by a conductor, the dielectric pillar forming the composite dielectric pillar being provided with an electric field generated at resonance. A TM multi-mode dielectric resonator comprising a frequency adjusting hole formed in a direction perpendicular to the direction, and a frequency adjusting dielectric rod being retained in the frequency adjusting hole so that the frequency adjusting hole can be inserted and removed. Is formed at a position where electric lines of force of a plurality of modes generated at the time of resonance pass, and is generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric lines of force of at least one mode among the plurality of modes. By changing the dielectric constant and the dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric force line of at least one other mode of the plurality of modes, the frequency Adjustment A TM multi-mode dielectric resonator, wherein a frequency difference between the resonance frequency of the at least one mode and the resonance frequency of the other at least one mode when the rod is inserted / removed is made constant. .
数調整用誘電体棒の断面形状とを異ならせることによ
り、複数のモードのうち少なくとも一つのモードの電気
力線の方向における前記周波数調整用誘電体棒と前記周
波数調整用孔とにより生じる誘電率と、複数のモードの
うち他の少なくとも一つのモードの電気力線の方向にお
ける前記周波数調整用誘電体棒と前記周波数調整用孔と
により生じる誘電率とを異ならせたことを特徴とする請
求項１記載のＴＭ多重モード誘電体共振器。2. The frequency adjustment in the direction of the electric force line of at least one mode among a plurality of modes by making the cross-sectional shape of the frequency adjustment hole different from the cross-sectional shape of the frequency adjustment dielectric rod. By the dielectric constant rod and the frequency adjusting hole, and the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric force line of at least one of the plurality of modes. 2. The TM multimode dielectric resonator according to claim 1, wherein the generated dielectric constant is different.
モードの電気力線の方向に沿って拡張して空隙部を形成
することにより、複数のモードのうち少なくとも一つの
モードの電気力線の方向における前記周波数調整用誘電
体棒と前記周波数調整用孔とにより生じる誘電率と、複
数のモードのうち他の少なくとも一つのモードの電気力
線の方向における前記周波数調整用誘電体棒と前記周波
数調整用孔とにより生じる誘電率とを異ならせたことを
特徴とする請求項１または請求項２記載のＴＭ多重モー
ド誘電体共振器。3. An electric power of at least one mode among a plurality of modes is formed by expanding an inner peripheral surface of the frequency adjusting hole along a direction of an electric force line of the one mode to form a void portion. The dielectric constant generated by the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the force line, and the frequency adjusting dielectric rod in the direction of the electric force line of at least one of the plurality of modes. 3. The TM multimode dielectric resonator according to claim 1 or 2, wherein the dielectric constants generated by the frequency adjusting hole and the frequency adjusting hole are different from each other.
周波数調整用誘電体棒の中心軸を偏心させることによ
り、複数のモードのうち少なくとも一つのモードの電気
力線の方向における前記周波数調整用誘電体棒と前記周
波数調整用孔とにより生じる誘電率と、複数のモードの
うち他の少なくとも一つのモードの電気力線の方向にお
ける前記周波数調整用誘電体棒と前記周波数調整用孔と
により生じる誘電率とを異ならせたことを特徴とする請
求項１ないし請求項３記載のＴＭ多重モード誘電体共振
器。4. The frequency in the direction of the lines of electric force of at least one mode among a plurality of modes by eccentricizing the center axis of the frequency adjusting dielectric rod with respect to the center axis of the frequency adjusting hole. A dielectric constant generated by the adjusting dielectric rod and the frequency adjusting hole, and the frequency adjusting dielectric rod and the frequency adjusting hole in the direction of the electric force line of at least one of the plurality of modes. 4. The TM multimode dielectric resonator according to claim 1, wherein the dielectric constant caused by the above is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16411695A JP3562037B2 (en) | 1995-06-29 | 1995-06-29 | TM multimode dielectric resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16411695A JP3562037B2 (en) | 1995-06-29 | 1995-06-29 | TM multimode dielectric resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0918210A true JPH0918210A (en) | 1997-01-17 |
| JP3562037B2 JP3562037B2 (en) | 2004-09-08 |
Family
ID=15787061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16411695A Expired - Fee Related JP3562037B2 (en) | 1995-06-29 | 1995-06-29 | TM multimode dielectric resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3562037B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010028590A (en) * | 2008-07-22 | 2010-02-04 | Ngk Spark Plug Co Ltd | Multiplex mode dielectric resonator, and adjusting method thereof |
-
1995
- 1995-06-29 JP JP16411695A patent/JP3562037B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010028590A (en) * | 2008-07-22 | 2010-02-04 | Ngk Spark Plug Co Ltd | Multiplex mode dielectric resonator, and adjusting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3562037B2 (en) | 2004-09-08 |
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