JPS5923122B2 - coaxial resonator - Google Patents
coaxial resonatorInfo
- Publication number
- JPS5923122B2 JPS5923122B2 JP1335876A JP1335876A JPS5923122B2 JP S5923122 B2 JPS5923122 B2 JP S5923122B2 JP 1335876 A JP1335876 A JP 1335876A JP 1335876 A JP1335876 A JP 1335876A JP S5923122 B2 JPS5923122 B2 JP S5923122B2
- Authority
- JP
- Japan
- Prior art keywords
- resonator
- conductors
- coaxial
- conductor
- center
- 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
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、本発明者らは誘電体を充填した同軸TEM共振
器を開発した。Therefore, the present inventors developed a coaxial TEM resonator filled with a dielectric material.
その場合Qが高いことから両端開放型1/2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 half-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1/2波長
同軸TEM共振器の中央にて内導体と外導体とを電気的
に導通させることにより、スプリアス特性を改善しよう
とする。This invention was made to eliminate this drawback, and the inner conductor and outer conductor are electrically connected at the center of a half-wavelength coaxial TEM resonator with open ends and a dielectric between the inner and outer conductors. By making it conductive, we try to improve the spurious characteristics.
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1/2波長間軸TEN
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, 1 is a half-wavelength axis TEN with both ends open.
In the resonator, a ceramic dielectric material 4 made of titanium oxide, 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する。For example, the dielectric 4 is cylindrical with 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と6は共振器中央にて内導体2と外導体3とを短絡す
るパイプ状の導体である。5 and 6 are pipe-shaped conductors that short-circuit the inner conductor 2 and the outer conductor 3 at 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Oまたは0に近いので、導体5と6の存在
が共振周波数に与える影響が小さい。With this structure, the electric field of the fundamental wave is O or close to 0 at or near the center of the resonator, so the presence of the conductors 5 and 6 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くなる。However, the electric field of the second harmonic has a maximum value or a value close to the maximum value at or near the center of the resonator.
したがって第2高調波共振に対しては共振器の中央部の
内・外導体間が短絡状態又は低インダクタシスで接続さ
れた状態になるので、第2高調波共振がおきないか又は
高域へ移動する。Therefore, for the second harmonic resonance, the inner and outer conductors in the center of the resonator are short-circuited or connected with low inductance, so the second harmonic resonance does not occur or Moving.
導体5と6は第1図と第2図に示すような配置でなくて
もよく、たとえば第3図に示すように両者が直角関係に
配設されていてもよい。The conductors 5 and 6 do not have to be arranged as shown in FIGS. 1 and 2; for example, they can be arranged at right angles as shown in FIG.
導体の本数は任意である。The number of conductors is arbitrary.
導体5や6の径が変わると短絡状態を示す周波数が変わ
るので、目的の周波数に適切な寸法に定める。If the diameters of the conductors 5 and 6 change, the frequency that indicates a short-circuit state will change, so the dimensions are determined to be appropriate for the desired frequency.
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
1/2波長同軸TEM共振器の中央にて内導体と外導体
とを電気的に導通させたから、第2高調波共振が生じな
くなるか本来より高い周波数域へ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, in the coaxial resonator of the present invention, the inner conductor and the outer conductor are connected at the center of the open-ended 1/2 wavelength coaxial TEM resonator in which a dielectric material is present between the inner and outer conductors. Since the second harmonic resonance is made electrically conductive, the second harmonic resonance does not occur or moves to a higher frequency range than originally, and the spurious characteristics are improved.
第1図はこの発明の一実施例の断面図、第2図は第1図
のA−A線断面図、第3図は別の実施例の断面図である
。
1は両端開放型1/2波長同軸TEM共振器、2は内導
体、3は外導体、4は誘電体、5と6は導体である。FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a sectional view of another embodiment. 1 is a half-wavelength coaxial TEM resonator with both ends open, 2 is an inner conductor, 3 is an outer conductor, 4 is a dielectric, and 5 and 6 are conductors.
Claims (1)
2波長同軸TEM共振器の中央にて内導体と外導体とを
電気的に導通させた同軸共振器。1 Open-ended type with a dielectric between the inner and outer conductors 1/
A coaxial resonator in which the inner conductor and outer conductor are electrically connected at the center of the two-wavelength coaxial TEM resonator.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1335876A JPS5923122B2 (en) | 1976-02-10 | 1976-02-10 | coaxial resonator |
US05/762,187 US4151494A (en) | 1976-02-10 | 1977-01-24 | Electrical filter |
GB386677A GB1568255A (en) | 1976-02-10 | 1977-01-31 | Electrical filter |
DE19772705245 DE2705245A1 (en) | 1976-02-10 | 1977-02-09 | ELECTRIC FILTER |
FR7703667A FR2341210A1 (en) | 1976-02-10 | 1977-02-09 | ELECTRIC FILTER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1335876A JPS5923122B2 (en) | 1976-02-10 | 1976-02-10 | coaxial resonator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5296849A JPS5296849A (en) | 1977-08-15 |
JPS5923122B2 true JPS5923122B2 (en) | 1984-05-31 |
Family
ID=11830866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1335876A Expired JPS5923122B2 (en) | 1976-02-10 | 1976-02-10 | coaxial resonator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5923122B2 (en) |
-
1976
- 1976-02-10 JP JP1335876A patent/JPS5923122B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5296849A (en) | 1977-08-15 |
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