JPS6216006Y2 - - Google Patents
Info
- Publication number
- JPS6216006Y2 JPS6216006Y2 JP1979073041U JP7304179U JPS6216006Y2 JP S6216006 Y2 JPS6216006 Y2 JP S6216006Y2 JP 1979073041 U JP1979073041 U JP 1979073041U JP 7304179 U JP7304179 U JP 7304179U JP S6216006 Y2 JPS6216006 Y2 JP S6216006Y2
- Authority
- JP
- Japan
- Prior art keywords
- cavity resonator
- end piece
- side wall
- coaxial structure
- present
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000005236 sound signal Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910001374 Invar Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【考案の詳細な説明】
本考案は主にUHFテレビジヨン放送機の定イ
ンピーダンス型ノツチダイプレクサ（CIN）に使
用される円筒形あるいは方形の空胴共振器に関す
る。[Detailed Description of the Invention] The present invention relates to a cylindrical or square cavity resonator mainly used in a constant impedance notch diplexer (CIN) of a UHF television broadcaster.
一般に、UHFテレビジヨン放送機の映像信号
と音声信号を合成するには第１図に示すように、
音声信号反射素子１とハイブリツド素子２とを組
合せたCINが使用されている。従来、CINを構成
する音声信号反射素子においては、映像信号の伝
送帯域に影響を与えないように急峻なノツチ特性
をもたせるとともに音声信号を損失なく反射させ
る必要から通常第２図及び第３図に示すような無
負荷Ｑの高い、円筒形空胴共振器あるいは、方形
空胴共振器が使われる。また周囲の温度変化に対
して共振周波数の変動幅を少なくする目的から、
空胴共振器の材料としては、熱膨張係数の小さな
インバー材が使用されている。 Generally, to synthesize the video signal and audio signal of a UHF television broadcaster, as shown in Figure 1,
A CIN that combines an audio signal reflection element 1 and a hybrid element 2 is used. Conventionally, the audio signal reflecting element that constitutes the CIN has to have a steep notch characteristic so as not to affect the transmission band of the video signal, and also to reflect the audio signal without loss, so it is usually designed as shown in Figures 2 and 3. A cylindrical cavity resonator or a rectangular cavity resonator with a high unloaded Q as shown is used. In addition, for the purpose of reducing the fluctuation range of the resonant frequency due to changes in ambient temperature,
Invar material, which has a small coefficient of thermal expansion, is used as the material for the cavity resonator.
しかしながら、UHF帯域における空胴共振器
は寸法的に可成り大きな物（600MHzの共振周波
数に対して、約400×300×350（ｍ／ｍ）の大き
さとなる。）で高価なインバー材を使用すること
は不経済でありまた、加工面の点から考えてもイ
ンバー材は硬度が高いため、切削、研磨、溶接等
が極めて困難であるという欠点を有していた。 However, the cavity resonator in the UHF band is quite large in size (approximately 400 x 300 x 350 (m/m) for a resonant frequency of 600 MHz) and is made of expensive Invar material. It is uneconomical to do so, and in terms of machining, Invar material has a high hardness, so it has the disadvantage that cutting, polishing, welding, etc. are extremely difficult.
本考案の目的は熱膨張係数の異なる加工性の良
い安価な金属材料を２種類使用して、上記欠点を
解決した空胴共振器を提供することにある。 An object of the present invention is to provide a cavity resonator that solves the above-mentioned drawbacks by using two kinds of inexpensive metal materials with different coefficients of thermal expansion and good workability.
すなわち本考案によれば、空胴共振器を構成す
る端片の金属を側壁の金属に比べて、熱膨張係数
の大きなものとし、かつ、該端片の少なくとも一
方空胴内に向つて、突起させることにより周囲温
度の変化に対して共振周波数の変動を少なした共
振器が得られる。 That is, according to the present invention, the metal of the end piece constituting the cavity resonator is made to have a larger coefficient of thermal expansion than the metal of the side wall, and at least one of the end pieces has a protrusion toward the inside of the cavity. By doing so, it is possible to obtain a resonator whose resonant frequency is less likely to fluctuate with respect to changes in ambient temperature.
次に本考案の実施例の図面を参照して本考案を
詳細に説明する。第４図は本考案の一実施例を示
す断面図である。図において、空胴の端片１およ
び端片１の対向面の端片ブロツク２はアルミニウ
ム製であり、側壁３は鉄製である。端片ブロツク
２は第５図に示す構造である。第４図において、
側壁３と端片ブロツク２の外部円筒部（半径ｂ）
とで長さh1の同軸線を形成し、端片ブロツク２内
部円筒部（半径ｄ）と外部円筒部（半径ｃ）とで
長さh3の同軸線を形成させている。これらの同軸
線の特性インプーダンスを低く選び、かつh1とh3
の長さの和が略共振波長の半分の場合、端片ブロ
ツク２の上面の円周部から該同軸線部を見た入力
インピーダンスはほぼＯΩとなり短絡状態に近く
なる。従つて、この時、上部空胴共振器のTE111
モードの共振周波数ｒは周知のとおり、
で与えられる。 The present invention will now be described in detail with reference to drawings of embodiments of the present invention. FIG. 4 is a sectional view showing an embodiment of the present invention. In the figure, the end piece 1 of the cavity and the end piece block 2 on the opposite side of the end piece 1 are made of aluminum, and the side wall 3 is made of iron. The end piece block 2 has the structure shown in FIG. In Figure 4,
External cylindrical portion of side wall 3 and end piece block 2 (radius b)
A coaxial line of length h 1 is formed by these, and a coaxial line of length h 3 is formed by the inner cylindrical part (radius d) and the outer cylindrical part (radius c) of the end piece block 2. The characteristic impedance of these coaxial lines is chosen low, and h 1 and h 3
When the sum of the lengths is approximately half of the resonant wavelength, the input impedance when looking at the coaxial line from the circumference of the upper surface of the end piece block 2 is approximately OΩ, which is close to a short circuit state. Therefore, at this time, TE 111 of the upper cavity resonator
As is well known, the resonance frequency r of the mode is is given by
こゝに、ｈは円筒空胴の高さ〔mm〕
ａは円筒の半径 〔mm〕
一方、端片ブロツク２の線熱膨張係数をK1
〔１／℃〕、側壁３の線熱膨張係数をK2〔１／
℃〕とすると、周囲温度変化１℃あたりに、共振
周波数変化△ｒ（Hz）は、
で与えられる。 Here, h is the height of the cylindrical cavity [mm] a is the radius of the cylinder [mm] On the other hand, the linear thermal expansion coefficient of the end piece block 2 is K 1
[1/℃], and the linear thermal expansion coefficient of the side wall 3 is K 2 [1/℃].
℃], the resonant frequency change △r (Hz) per 1℃ ambient temperature change is is given by
ここに、h1h2は、それぞれ第２図に示す円筒の
高さでｂ＝b2−b1の関係にある。いま、ｈ＝ａ即
ち、円筒空胴の高さを半径に等しく選ぶと(2)式
は、
で表わされる。ここで△r＝０にするには
k2h2−k1h1＋（１．８４１／π）2k2（h2−h1）＝０…
……(4)
が成立すれば良いことが分る。 Here, h 1 h 2 are the heights of the cylinders shown in FIG. 2, and have the relationship b=b 2 -b 1 . Now, if we choose h=a, that is, the height of the cylindrical cavity to be equal to the radius, equation (2) becomes It is expressed as Here, to make △ r = 0, k 2 h 2 −k 1 h 1 + (1.841/π) 2 k 2 (h 2 − h 1 )=0…
...It turns out that it is good if (4) holds true.
従つて、例えば、端片ブロツク２にアルミニウ
ムを側壁３に鉄を使用すればk1≒2.4×10-5
〔１／℃〕及びk2＝1.1×10-5〔１／℃〕であるの
で、これらを(4)式に代入してh1とb2の関係を求め
ると、
h1≒0.53h2
が得られる。 Therefore, for example, if aluminum is used for the end block 2 and iron is used for the side wall 3, k 1 ≒2.4×10 -5
[1/℃] and k 2 = 1.1×10 -5 [1/℃], so by substituting these into equation (4) to find the relationship between h 1 and b 2 , h 1 ≒0.53h 2 is obtained.
第６図は、本考案の別の実施例を示す断面図で
ある。第６図の実施例では、第４図に示す端片ブ
ロツク１２の熱膨張を増加させることにより、等
価例に端片ブロツク１２の線熱膨張係数を大きく
したことになり、h1に対するh2の割合を小さくす
る事ができる。結果として、h2の寸法を短かく選
べる。この第２の実施例は、共振周波数が低く、
ｈの長さが大きい場合に特に効果を発揮する。 FIG. 6 is a sectional view showing another embodiment of the present invention. In the embodiment shown in FIG. 6, by increasing the thermal expansion of the end piece block 12 shown in FIG . It is possible to reduce the ratio of As a result, the dimension of h 2 can be chosen short. This second embodiment has a low resonant frequency;
This is particularly effective when the length of h is large.
尚、上記実施例は円筒空胴共振器について説明
したが、方形空胴共振器についても、同じような
考え方で構成出来ることは明らかである。また、
上記実施例では、空胴共振器の片方の端片のみ、
空胴共振器に突起させているが両方の端片につい
て、内部に突起させる構成でも実施可能である。 Incidentally, although the above embodiment has been described with respect to a cylindrical cavity resonator, it is clear that a rectangular cavity resonator can also be constructed using the same concept. Also,
In the above embodiment, only one end piece of the cavity resonator is
Although both end pieces are projected from the cavity resonator, it is also possible to implement a configuration in which both end pieces are projected inside.
本考案は、以上説明したように安価でかつ加工
の容易な金属材料を使用して周囲温度に対して、
共振周波数の安定した空胴共振器を提供できる効
果がある。 As explained above, the present invention uses inexpensive and easy-to-process metal materials to
This has the effect of providing a cavity resonator with a stable resonance frequency.
第１〜３図は、CINに従来使用されている音声
信号反射素子の説明図、第４図は、本考案の一実
施例を示した断面図、第５図は、第４図のブロツ
ク２概略見取り図、第６図は、本考案の第二の実
施例を示す断面図、
図において、１……空胴共振器の端片、２……
空胴共振器の内部へ突起した端片ブロツク、３…
…空胴共振器の側壁、１１……空胴共振器の端
片、１２……空胴共振器の内部へ突起した端片ブ
ロツク、１３……空胴共振器の側壁、１４……発
熱体。
1 to 3 are explanatory diagrams of audio signal reflection elements conventionally used in CIN, FIG. 4 is a sectional view showing an embodiment of the present invention, and FIG. 5 is a block 2 of FIG. 4. The schematic diagram, FIG. 6, is a sectional view showing the second embodiment of the present invention. In the figure, 1... end piece of a cavity resonator, 2...
End block protruding into the cavity resonator, 3...
...Side wall of the cavity resonator, 11... End piece of the cavity resonator, 12... End piece block protruding into the inside of the cavity resonator, 13... Side wall of the cavity resonator, 14... Heating element .
Claims (1)
て、少なくとも一方の端片を共振器内部に突起せ
しめて前記側壁と前記突起部表面との間に第１の
同軸構造を形成し、前記第１の同軸構造内部に溝
を設けこの溝により第２の同軸構造を形成すると
ともに、前記端片を前記側壁よりも熱膨張係数の
大きい金属で作つたことを特徴とする空胴共振
器。 In a cavity resonator composed of a side wall and an end piece, at least one end piece is made to protrude inside the resonator to form a first coaxial structure between the side wall and the surface of the protrusion, and the first coaxial structure is formed between the side wall and the surface of the protrusion. A cavity resonator characterized in that a groove is provided inside the first coaxial structure, the groove forms a second coaxial structure, and the end piece is made of a metal having a larger coefficient of thermal expansion than the side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979073041U JPS6216006Y2 (en) | 1979-05-30 | 1979-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979073041U JPS6216006Y2 (en) | 1979-05-30 | 1979-05-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55173611U JPS55173611U (en) | 1980-12-12 |
| JPS6216006Y2 true JPS6216006Y2 (en) | 1987-04-23 |
Family
ID=29306661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979073041U Expired JPS6216006Y2 (en) | 1979-05-30 | 1979-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6216006Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117957A (en) * | 1977-03-24 | 1978-10-14 | Nec Corp | Frequency variable cavity resonator of high output clystron |
-
1979
- 1979-05-30 JP JP1979073041U patent/JPS6216006Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117957A (en) * | 1977-03-24 | 1978-10-14 | Nec Corp | Frequency variable cavity resonator of high output clystron |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55173611U (en) | 1980-12-12 |
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