JPH01135104A - Cavity resonator - Google Patents
Cavity resonatorInfo
- Publication number
- JPH01135104A JPH01135104A JP29178787A JP29178787A JPH01135104A JP H01135104 A JPH01135104 A JP H01135104A JP 29178787 A JP29178787 A JP 29178787A JP 29178787 A JP29178787 A JP 29178787A JP H01135104 A JPH01135104 A JP H01135104A
- Authority
- JP
- Japan
- Prior art keywords
- resonance
- rod
- resonance rod
- resonant rod
- effective length
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Non-Reversible Transmitting Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は共振周波数の温度変化を零又は小さな値に抑え
たキャビティ共振器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cavity resonator in which temperature change in resonance frequency is suppressed to zero or a small value.
従来のキャビティ共振器は、第３図に概念構造を示すよ
うに、導電体で作られた筺体１１で画成される空洞部の
内壁に共振棒１３を内方に突出ささせるように取付けた
構造となっていた。このキャビティ共振器では、その共
振周波数は、空洞部内における共振棒の長さ、即ち第３
図におけるＬ′により定められる。As the conceptual structure of the conventional cavity resonator is shown in FIG. 3, a resonant rod 13 is attached to the inner wall of a cavity defined by a casing 11 made of a conductive material so as to protrude inward. It had a structure. In this cavity resonator, its resonant frequency is determined by the length of the resonant rod within the cavity, that is, the third
It is determined by L' in the figure.
上述した従来のキャビティ共振器は、温度変化により共
振棒１３が熱膨張してその長さＬ′が変化されると、こ
れに伴って共振周波数も変化されることになり、結果と
して温度変化に依存した不安定な周波数特性を呈すると
いう問題を有している。In the conventional cavity resonator described above, when the resonant rod 13 thermally expands due to temperature change and its length L' changes, the resonant frequency also changes accordingly, and as a result, the resonant rod 13 expands due to temperature change. The problem is that it exhibits dependent and unstable frequency characteristics.
本発明は温度変化に対する周波数特性の変化を零又は極
めて小さい値にしたキャビティ共振器を提供することを
目的としている。An object of the present invention is to provide a cavity resonator whose frequency characteristics change with respect to temperature changes to zero or extremely small values.
本発明のキャビティ共振器は、導電体で構成される筐体
の空洞部内に突出される共振棒の外側端を筐体とは別体
の共振棒固定部により固定し、かつこの共振棒の有効長
を温度変化にかかわらず−定に保ち得るように共振棒固
定部の材質及びその固定位置を任意に変更かつ設定可能
に構成している。In the cavity resonator of the present invention, the outer end of a resonant rod protruding into the cavity of a casing made of a conductor is fixed by a resonant rod fixing part separate from the casing, and the resonant rod is effectively The material of the resonance rod fixing part and the fixing position thereof can be changed and set as desired so that the length can be kept constant regardless of temperature changes.
次に、本発明を図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
（第１実施例） 第１図は本発明の第１実施例の断面図である。(First example) FIG. 1 is a sectional view of a first embodiment of the present invention.
図において導電体で構成される筐体１の一部には穴が開
設され、ここには筐体１と別体に構成した共振棒固定部
２を取着している。そして、前記筐体１の空洞内に突出
される共振棒３は、その外側端Ａにおいて共振棒固定部
２により接合されている。また、共振棒３は前記筐体１
の穴の内縁Ｂにおいて電気的に接触されている。In the figure, a hole is formed in a part of a casing 1 made of a conductive material, and a resonant rod fixing part 2, which is constructed separately from the casing 1, is attached to the hole. The resonance rod 3 protruding into the cavity of the housing 1 is joined at its outer end A by a resonance rod fixing part 2. Further, the resonance rod 3 is attached to the housing 1.
electrical contact is made at the inner edge B of the hole.
この構成において、今共振棒３の有効長（筐体部１の内
壁から共振棒３先端までの距離）をＬとする。また、共
振棒３と共振棒固定部２の接合部から共振棒３先端まで
の距離を２０、同じく接合部から筺体１の内壁までの距
離を１２とする。更に、共振棒３．共振棒固定部２の各
熱膨張率をそれぞれα１、α２とする。α１．α、は次
式で与えられる。In this configuration, the effective length of the resonant rod 3 (the distance from the inner wall of the housing section 1 to the tip of the resonant rod 3) is now L. Further, the distance from the joint between the resonant rod 3 and the resonant rod fixing part 2 to the tip of the resonant rod 3 is 20, and the distance from the joint to the inner wall of the housing 1 is also 12. Furthermore, the resonance rod 3. Let the coefficients of thermal expansion of the resonance rod fixing portion 2 be α1 and α2, respectively. α1. α is given by the following formula.
αＩ−（１／Ｌ ）Ｘ （ｄｊ２＋ ／ｄＴ）α２−
（１／ Ｉ！、ｚ ） Ｘ （ｄ ｌｚ ／ ｄＴ）・
・・（１）（Ｔ：絶対温度）
また、共振棒の有効長しは次式で与えられる。αI-(1/L)X (dj2+/dT)α2-
(1/ I!, z ) X (d lz / dT)・
...(1) (T: absolute temperature) Also, the effective length of the resonant rod is given by the following formula.
Ｌ＝１！、、 −ｆｆｉ、 ・・・
（２）有効長しの温度係数をα、とすると、
αＬ −（１／Ｌ）Ｘ （ｄＬ／ｄＴ）−（１／ （４
２，−Ｌ ））
ｘ （ｄＬ ／ｄＴ−ｄｎｚ ／ｄＴ）−（αＩ ｊ２
１−α２ｐ、２）／ （ｐ、４２ ）・・・（３）
したがって、
α１ ：α２＝１７Ｉ！、、： ｉ／ｆｚ ・・・（
４）が成り立つ時、αｔ−０となる。この時、キャビテ
ィ共振器の共振周波数を温度に関係なく一定に保つこと
ができる。L=1! ,, -ffi, ...
(2) If the temperature coefficient of the effective length is α, then αL − (1/L)X (dL/dT) − (1/ (4
2,-L)) x (dL/dT-dnz/dT)-(αI j2
1-α2p, 2)/(p, 42)...(3) Therefore, α1 :α2=17I! ,,: i/fz...(
When 4) holds, αt-0. At this time, the resonant frequency of the cavity resonator can be kept constant regardless of temperature.
例えば、共振棒３に白金、共振棒固定部２に亜鉛を用い
、共振棒の必要有効長しが２１ｍＭであるとする。白金
、亜鉛の常温における熱膨張率はそれぞれ９ （Ｋ−’
） 、 ３０ （Ｋ−’）であるので、（２）及び（４
）式より！、を３０ｍｍ、 ４２２を９ｍｍとすればよ
い。For example, it is assumed that the resonant rod 3 is made of platinum, the resonant rod fixing part 2 is made of zinc, and the required effective length of the resonant rod is 21 mm. The thermal expansion coefficients of platinum and zinc at room temperature are each 9 (K-'
), 30 (K-'), so (2) and (4
) From the formula! , should be 30 mm, and 422 should be 9 mm.
（第２実施例）
第２図は本発明の第２実施例を示す図であり、第１図と
同−又は均等部分には同一符号を付しである。(Second Embodiment) FIG. 2 is a diagram showing a second embodiment of the present invention, in which the same or equivalent parts as in FIG. 1 are given the same reference numerals.
この実施例では共振棒固定部２にポリエチレン。In this embodiment, the resonance rod fixing part 2 is made of polyethylene.
ナイロン等の高分子化合物、即ち絶縁体を使用し、その
熱膨張率を金属の数十倍に高めている。A polymer compound such as nylon, that is, an insulator, is used, and its coefficient of thermal expansion is several tens of times higher than that of metal.
即ち、金属の熱膨張率は、ナトリウム、カリウム等のア
ルカリ金属を除くといずれも同じような値である。この
ため、第１実施例で説明したような効果を大きくするた
めには、！！、２を大きくする必要がある。一方、共振
棒固定器２に前記した高分子化合物を用いれば、その熱
膨張率が金属の数十倍であるのでＩ！、２を小さ（する
ことができる。That is, the thermal expansion coefficients of all metals are similar except for alkali metals such as sodium and potassium. Therefore, in order to increase the effect as explained in the first embodiment, it is necessary to! ! , 2 needs to be increased. On the other hand, if the above-mentioned polymer compound is used for the resonant bar fixture 2, its coefficient of thermal expansion is several tens of times that of metal, so I! , 2 can be made small.
しかし、この場合には共振棒３と筐体１とを電気的に確
実に導通させるため、第２図に示すようにリン青銅等の
ようにバネ性を持った金属材料で形成したコンタクト４
を筺体１の穴に臨んで設け、これを共振棒３の周面に接
触させている。However, in this case, in order to ensure electrical continuity between the resonance rod 3 and the housing 1, the contact 4 is made of a metal material with spring properties such as phosphor bronze, as shown in FIG.
is provided facing the hole of the housing 1, and is brought into contact with the circumferential surface of the resonant rod 3.
第２図の実施例では、共振棒固定部２と筺体１の外側金
属部分との接合点が筺体１の内壁面と一致していないの
で、その距離ｄを考慮する必要がある。In the embodiment shown in FIG. 2, since the joining point between the resonant rod fixing part 2 and the outer metal part of the housing 1 does not coincide with the inner wall surface of the housing 1, it is necessary to consider the distance d.
共振棒３の有効長しは、第２図では次のように表される
。The effective length of the resonant rod 3 is expressed as follows in FIG.
Ｌ！、−Ｌ−ｄ ・・・（５）筐体１
の外側金属部分の熱膨張率をα３とすると、有効長しの
温度係数α、は次式のようになる。L! , -L-d...(5) Housing 1
If the coefficient of thermal expansion of the outer metal portion of is α3, then the temperature coefficient α of the effective length is given by the following equation.
α、−（α１！１−α２ｊ２２−α３ｄ）／ （ｐ＋
−Ｌ −ｄ） ・・・（６）したがって、α、が零
となるための条件は、α１１Ｉ−α２！２＋α３ｄ
・・・（７）となる。α, −(α1!1−α2j22−α3d)/(p+
-L -d) ...(6) Therefore, the condition for α to be zero is α11I-α2!2+α3d
...(7).
例えば、共振棒３に銅、共振棒固定部２にテフロン、筐
体１の外側金属部分にアルミニウムを用い、共振棒の必
要有効長しが２１ｍｍ、 αが２ｍｍであるとする。For example, it is assumed that copper is used for the resonance rod 3, Teflon is used for the resonance rod fixing part 2, aluminum is used for the outer metal part of the housing 1, the required effective length of the resonance rod is 21 mm, and α is 2 mm.
銅、テフロン、アルミニウムの熱膨張率はそれぞれ１６
．７に一’、 １１０ Ｋ−’、 ２３に一’であるの
で、（５）式及び（７）式より１１を２６．６ｍｍ、、
ｌ ２を３．６ｍｍとすればよい。Copper, Teflon, and aluminum each have a coefficient of thermal expansion of 16.
．． 7 is 1', 110 K-' is 1', and 23 is 1', so from equations (5) and (7), 11 is 26.6 mm,
l 2 may be set to 3.6 mm.
以上説明したように本発明は、空洞部内に突出される共
振棒の外側端を固定する共振棒固定部の材質及びその固
定位置を任意に変更して共振棒の有効長を温度変化にか
かわらず一定に保ち得るようにしているので、キャビテ
ィ共振器の共振周波数の温度変化を零又は極めて小さい
値に低減できる効果がある。As explained above, the present invention allows the effective length of the resonant rod to be maintained regardless of temperature changes by arbitrarily changing the material and the fixing position of the resonant rod fixing part that fixes the outer end of the resonant rod projected into the cavity. Since it can be kept constant, there is an effect that temperature change in the resonant frequency of the cavity resonator can be reduced to zero or an extremely small value.
第１図は本発明のキャビティ共振器の第１実施例の断面
図、第２図は共振棒固定部に高分子系絶縁材料を用いた
第２実施例の断面図、第３図は従来のキャビティ共振器
の概念的な断面図である。
１・・・筐体（空洞部）、２・・・共振棒固定部、３・
・・共振棒、１１・・・筐体（空洞部）、１３・・・共
振棒。
第１図
第２図Fig. 1 is a sectional view of a first embodiment of the cavity resonator of the present invention, Fig. 2 is a sectional view of a second embodiment in which a polymeric insulating material is used for the resonant rod fixing part, and Fig. 3 is a sectional view of a conventional cavity resonator. FIG. 2 is a conceptual cross-sectional view of a cavity resonator. 1... Housing (cavity part), 2... Resonance bar fixing part, 3...
... Resonance bar, 11... Housing (cavity part), 13... Resonance bar. Figure 1 Figure 2
Claims (1)
共振棒の長さを変化させてその共振周波数を変化させる
キャビティ共振器において、前記共振棒の外側端を筐体
とは別体の共振棒固定部により固定し、かつこの共振棒
の有効長を温度変化にかかわらず一定に保ち得るように
前記共振棒固定部の材質及びその固定位置を任意に変更
かつ設定可能に構成したことを特徴とするキャビティ共
振器。(1) In a cavity resonator in which the resonant frequency is changed by changing the length of a resonant rod protruding into a cavity of a casing made of a conductor, the outer end of the resonant rod is separated from the casing. The resonant rod is fixed by a resonant rod fixing part of the body, and the material of the resonant rod fixing part and its fixing position can be arbitrarily changed and set so that the effective length of the resonant rod can be kept constant regardless of temperature changes. A cavity resonator characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291787A JP2594584B2 (en) | 1987-11-20 | 1987-11-20 | Cavity resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291787A JP2594584B2 (en) | 1987-11-20 | 1987-11-20 | Cavity resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135104A true JPH01135104A (en) | 1989-05-26 |
| JP2594584B2 JP2594584B2 (en) | 1997-03-26 |
Family
ID=17773421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62291787A Expired - Fee Related JP2594584B2 (en) | 1987-11-20 | 1987-11-20 | Cavity resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2594584B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015194541A1 (en) * | 2014-06-16 | 2015-12-23 | 日本電業工作株式会社 | Resonator and filter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748803A (en) * | 1980-09-08 | 1982-03-20 | Denki Kogyo Kk | Temperature compensation device for coaxial type filter |
-
1987
- 1987-11-20 JP JP62291787A patent/JP2594584B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748803A (en) * | 1980-09-08 | 1982-03-20 | Denki Kogyo Kk | Temperature compensation device for coaxial type filter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015194541A1 (en) * | 2014-06-16 | 2015-12-23 | 日本電業工作株式会社 | Resonator and filter |
| JP2016005101A (en) * | 2014-06-16 | 2016-01-12 | 日本電業工作株式会社 | Resonator and filter |
| CN105706293A (en) * | 2014-06-16 | 2016-06-22 | 日本电业工作株式会社 | Resonator and filter |
| CN105706293B (en) * | 2014-06-16 | 2019-04-05 | 日本电业工作株式会社 | Resonator and filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2594584B2 (en) | 1997-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |