JPS5923121B2 - coaxial oscillator - Google Patents
coaxial oscillatorInfo
- Publication number
- JPS5923121B2 JPS5923121B2 JP1335776A JP1335776A JPS5923121B2 JP S5923121 B2 JPS5923121 B2 JP S5923121B2 JP 1335776 A JP1335776 A JP 1335776A JP 1335776 A JP1335776 A JP 1335776A JP S5923121 B2 JPS5923121 B2 JP S5923121B2
- Authority
- JP
- Japan
- Prior art keywords
- resonator
- conductor
- coaxial
- center
- wavelength
- 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
Links
- 239000004020 conductor Substances 0.000 claims description 21
- 239000003989 dielectric material Substances 0.000 claims description 3
- 230000005684 electric field Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【発明の詳細な説明】 この発明は、同軸共振器に関する。[Detailed description of the invention] The present invention relates to a coaxial resonator.
従来、ＶＨＦ帯もしくはＵＨＦ帯で用いられているフィ
ルタとしてＬＣ共振器を用いたものや、同軸共振器を用
いたものがあった。Conventionally, filters used in the VHF band or UHF band include those using an LC resonator and those using a coaxial resonator.
しかし、前者は、充分な選択度特性が得られないし、後
者は、形状が大きい欠点があった。However, the former has the disadvantage that sufficient selectivity characteristics cannot be obtained, and the latter has a large size.
近年、通信機器分野においては、システムの小型軽量化
が熱望されているが、他の部品は小型軽量化が図られて
いるなかで、その重要性から数多く使われているにもか
かわらずフィルタは、小型軽量化が困難なため、システ
ムの小型軽量化を遅らせていた。In recent years, in the communication equipment field, there has been a strong desire to make systems smaller and lighter.While other components are being made smaller and lighter, filters are still being used in large numbers due to their importance. However, it has been difficult to make the system smaller and lighter, which has delayed efforts to make the system smaller and lighter.
そのためフィルタの小型軽量化が、この分野の技術者に
とって至上命令であった。Therefore, reducing the size and weight of filters has been a top priority for engineers in this field.
そこで、本発明者らは誘導体を充填した同軸ＴＥＭ共振
器を開発した。Therefore, the present inventors developed a coaxial TEM resonator filled with a dielectric.
その場合Ｑが高いことから両端開放型％波長共振器にす
ることが多いが、第２高調波共振がスプリアスとして発
生する欠点がある。In this case, since the Q is high, a % wavelength resonator with both ends open is often used, but it has the disadvantage that second harmonic resonance occurs as spurious.
この発明は、この欠点をのぞくためになされたもので、
誘導体を内・外導体間に存在させた両端開放型％波長同
軸ＴＥＭ共振器の中央にて穴を穿設し内部に導体を設け
ることにより、スプリアス特性を改善しようとする。This invention was made to eliminate this drawback.
An attempt is made to improve the spurious characteristics by drilling a hole in the center of a % wavelength coaxial TEM resonator with a dielectric between the inner and outer conductors and providing a conductor inside.
以下にこの発明の実施例を図面を参照しながら説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第１図において、１は両端開放型％波長同軸ＴＥＭ共振
器で、内導体２と外導体３との間にはたとえば酸化チタ
ン系のセラミック誘電体４が充填されている。In FIG. 1, reference numeral 1 designates a % wavelength coaxial TEM resonator with both ends open, and a ceramic dielectric material 4 of titanium oxide type, for example, is filled between an inner conductor 2 and an outer conductor 3.
誘電体４は一例として中心孔を有する円柱状のものを用
い、孔内表面に銀を焼付けて内導体とした。For example, the dielectric 4 is a cylindrical one having a central hole, and silver is baked on the inner surface of the hole to form an inner conductor.
誘電体４の外表面には銀を焼付けて外導体とする。Silver is baked onto the outer surface of the dielectric 4 to form an outer conductor.
５は共振器中央にて穿設した穴に設けたパイプ状導体で
ある。5 is a pipe-shaped conductor provided in a hole drilled in the center of the resonator.
このような構造だと基本波の電界は共振器の中央又は中
央部付近は０または０に近いので、導体５の存在が共振
周波数に与える影響が小さい。In such a structure, the electric field of the fundamental wave is 0 or close to 0 at or near the center of the resonator, so the presence of the conductor 5 has little effect on the resonant frequency.
しかし、第２高調波の電界は共振器の中央又は中央部付
近が最大値もしくは最大値に近（なる。However, the electric field of the second harmonic is at or near the maximum value at or near the center of the resonator.
そして第２高調波に対しては導体５と、導体５−内導体
間の誘導体とで直列共振回路が構成されて共振器の中央
部が短絡状態になるので第２高調波共振がおきない。For the second harmonic, a series resonant circuit is formed by the conductor 5 and the inductor between the conductor 5 and the inner conductor, and the center of the resonator is short-circuited, so that no second harmonic resonance occurs.
導体５の深さや径等の諸条件によって直列共振がおきる
周波数が決定されるので目的に応じ適宜に設定する。The frequency at which series resonance occurs is determined by conditions such as the depth and diameter of the conductor 5, so it is set appropriately depending on the purpose.
直列共振がおきなくてもインダクタンス又はキャパシタ
ンスが共振器の中央部にて、外導体と内導体との間に接
続されていることになるから、第２高調波振動は本来の
位置からずれた周波数域で起こることになり、場合によ
ってはスプリアス特性が向上する。Even if series resonance does not occur, inductance or capacitance is connected between the outer conductor and the inner conductor at the center of the resonator, so the second harmonic vibration occurs at a frequency that is shifted from its original position. In some cases, spurious characteristics may improve.
以上の実施例からもあきらかなように、この発明の同軸
共振器は、誘電体を内・外導体間に存在させた両端開放
型％波長同軸ＴＥＭ共振器の中央にて穴を穿設し内部に
導体を設けたので、第２高調波共振が生じなくなるか、
周波数が実用上問題のない周波数域まで移動するので、
スプリアス特性が向上する。As is clear from the above embodiments, the coaxial resonator of the present invention is a % wavelength coaxial TEM resonator with a dielectric material between the inner and outer conductors, with a hole bored in the center of the % wavelength coaxial TEM resonator. Since a conductor is provided in the
Since the frequency moves to a frequency range where there is no practical problem,
Spurious characteristics are improved.
第１図はこの発明の一実施例の断面図である。
１は両端開放型％波長同軸ＴＥＭ共振器、２は内導体、
３は外導体、４は誘導体、５は導体である。FIG. 1 is a sectional view of one embodiment of the present invention. 1 is an open-ended % wavelength coaxial TEM resonator, 2 is an inner conductor,
3 is an outer conductor, 4 is an inductor, and 5 is a conductor.
Claims (1)
長同軸ＴＥＭ共振器の中央にて穴を穿設し内部に導体を
設けた同軸共振器。1. A coaxial resonator in which a hole is bored in the center of a % wavelength coaxial TEM resonator with a dielectric material present between the inner and outer conductors and a conductor provided inside.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1335776A JPS5923121B2 (en) | 1976-02-10 | 1976-02-10 | coaxial oscillator |
| US05/762,187 US4151494A (en) | 1976-02-10 | 1977-01-24 | Electrical filter |
| GB386677A GB1568255A (en) | 1976-02-10 | 1977-01-31 | Electrical filter |
| FR7703667A FR2341210A1 (en) | 1976-02-10 | 1977-02-09 | ELECTRIC FILTER |
| DE19772705245 DE2705245A1 (en) | 1976-02-10 | 1977-02-09 | ELECTRIC FILTER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1335776A JPS5923121B2 (en) | 1976-02-10 | 1976-02-10 | coaxial oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5296848A JPS5296848A (en) | 1977-08-15 |
| JPS5923121B2 true JPS5923121B2 (en) | 1984-05-31 |
Family
ID=11830839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1335776A Expired JPS5923121B2 (en) | 1976-02-10 | 1976-02-10 | coaxial oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923121B2 (en) |
-
1976
- 1976-02-10 JP JP1335776A patent/JPS5923121B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5296848A (en) | 1977-08-15 |
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