JPH01119101A - Amplifier with low noise - Google Patents
Amplifier with low noiseInfo
- Publication number
- JPH01119101A JPH01119101A JP27470487A JP27470487A JPH01119101A JP H01119101 A JPH01119101 A JP H01119101A JP 27470487 A JP27470487 A JP 27470487A JP 27470487 A JP27470487 A JP 27470487A JP H01119101 A JPH01119101 A JP H01119101A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- choke
- amplifier
- input
- input terminal
- 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.)
- Pending
Links
- 230000006866 deterioration Effects 0.000 abstract description 6
- 239000004020 conductor Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Waveguide Connection Structure (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、マイクロ波帯における低雑音増幅器に関し、
詳しくは導波管による入力端での人力損失を最小として
低雑音化を図り、衛星通信等の分野で利用される低雑音
増幅器に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a low noise amplifier in the microwave band.
More specifically, the present invention relates to a low-noise amplifier that minimizes human power loss at the input end of a waveguide to reduce noise and is used in fields such as satellite communications.
［従来の技術とその問題点コ
従来、・９波管入力をもつ増幅器は、第２図に示すよう
に、導波管４による入力端Ｉと外部導波管１０とをそれ
ぞれ固定した状態で接続していた。[Prior art and its problems] Conventionally, an amplifier with 9 wave tube inputs was constructed with the input end I of the waveguide 4 and the external waveguide 10 fixed, respectively, as shown in FIG. It was connected.
しかしながら、このように入力端を固定する接続−Ｌ段
では、増幅器本体１の機械的逃げがなくなり、高周波回
路にかかる機械的歪による特性のずれを起すことがあっ
た。However, in the connection-L stage in which the input end is fixed in this manner, there is no mechanical escape of the amplifier main body 1, and a deviation in characteristics may occur due to mechanical strain applied to the high frequency circuit.
また、低雑音増幅器では、−層の低雑音化を図るため、
本体部を冷却することがある。しかし。In addition, in low-noise amplifiers, in order to reduce noise in the − layer,
The main body may be cooled down. but.
に述のように入力端工において、導波管４を外部導波管
１０と固定した状７ｇＨに接続した場合、導波管１０．
４を伝わって熱が流入してくるおそれがあり、効果的な
冷却が行なえなかった。When the waveguide 4 is connected to the external waveguide 10 in a fixed state 7gH at the input terminal as described in , the waveguide 10.
There was a risk that heat would flow in through the tube 4, and effective cooling could not be achieved.
さらに、入力端Ｉまたは竿体部３に気密性を必要とする
構造の場合、第２図に示すように、フランジ１０ａ部分
に別体の気密窓１１を介在して設けなければならず、回
路損失が大きくなる問題があった。Furthermore, if the input end I or the rod body 3 has a structure that requires airtightness, a separate airtight window 11 must be provided at the flange 10a as shown in FIG. There was a problem of large losses.
本発明はこのような問題点に鑑みてなされたもので、機
械的歪を生ずることなく安定かつ高レベルな高周波特性
を示す低雑音増幅器の提供を目的とする。The present invention has been made in view of these problems, and it is an object of the present invention to provide a low-noise amplifier that exhibits stable and high-level high-frequency characteristics without causing mechanical distortion.
［問題点の解決手段］
上記目的を達成するために、本発明は、導波管による入
力端をもつマイクロ波帯低雑音増幅器において、上記入
力端にチョーク形の非接触フランジを設けた構成としで
ある。[Means for Solving Problems] In order to achieve the above object, the present invention provides a microwave band low noise amplifier having an input end formed by a waveguide, in which a choke-shaped non-contact flange is provided at the input end. It is.
［実施例］
以下１本発明の一実施例について図面を参照して説明す
る。[Example] An example of the present invention will be described below with reference to the drawings.
第１図は本実施例に係る低雑音増幅器の断面図である。FIG. 1 is a sectional view of a low noise amplifier according to this embodiment.
図面において、１は増幅器本体であり、支持台２に固定
した状態で、筐体３内に収納されている。増幅器本体１
の入力端Ｉは入力導波管４で形成してあり、その人力導
波管４の先端部にはチョーク形フランジ５が設けである
。このチョーク形フランジ５は、導波管端面を直接接触
せずに等価的に短絡できるような構造のものである。な
お、かかるチョーク形フランジ５はチョーク部５ａとカ
バ一部５ｂとで形成されている。In the drawings, reference numeral 1 denotes an amplifier main body, which is housed in a housing 3 while being fixed to a support base 2. Amplifier body 1
The input end I is formed by an input waveguide 4, and a choke-shaped flange 5 is provided at the tip of the input waveguide 4. This choke-shaped flange 5 is of such a structure that it is possible to equivalently short-circuit the end faces of the waveguide without directly contacting them. The choke-shaped flange 5 is formed by a choke portion 5a and a cover portion 5b.
１−述した構成の低雑音増幅器においては、入力端Ｉか
ら入った信号はチョーク形フランジ５を介して増幅器本
体１に導かれる。ここで、チョーク部５ ａとカバ一部
５ｂの間には間隙５ｃが形成されるため、人力導波管４
と外部導体とは非接触となり、増幅器本体ｌの機械的逃
げが確保される。1- In the low-noise amplifier configured as described above, a signal entering from the input terminal I is guided to the amplifier body 1 via the choke-shaped flange 5. Here, since a gap 5c is formed between the choke part 5a and the cover part 5b, the manual waveguide 4
and the external conductor are not in contact with each other, and mechanical escape of the amplifier main body l is ensured.
このため、入力端工に機械的歪を生ぜず、高周波特性の
劣化を引き起こすこともない。Therefore, no mechanical distortion occurs in the input terminals, and no deterioration of high frequency characteristics occurs.
また、低雑音増幅器では低雑音特性向上のため、増幅器
本体１を冷却することが行なわれるが、チョーク形フラ
ンジ５の間隙５ａにより、外部導波管からの冷却部への
熱の流入を阻止でき、冷却効果を高める。しかも、冷却
による温度変化にともなう膨張、収縮に起因する機械的
歪も、チョーク形７ランジ５の間隙５Ｃにより吸収され
るため、この場合にも高周波特性の劣化を有効に阻止で
きる。Furthermore, in a low-noise amplifier, the amplifier main body 1 is cooled to improve low-noise characteristics, but the gap 5a of the choke-shaped flange 5 prevents heat from flowing into the cooling section from the external waveguide. , enhance the cooling effect. Furthermore, mechanical strain caused by expansion and contraction due to temperature changes due to cooling is also absorbed by the gap 5C of the choke-shaped seven flange 5, so that deterioration of the high frequency characteristics can be effectively prevented in this case as well.
ところで、低雑音増幅器では入力導波管４や筐体３を気
密構造とすることを求められることが多い、このような
要求に対し、本実施例では、気密用絶縁膜６を間隙５Ｃ
に挿入し、これをＯリング７に９で気密処理して気密構
造を実現し、高周波特性の劣化を防止している。Incidentally, in low noise amplifiers, the input waveguide 4 and the housing 3 are often required to have an airtight structure.In response to such a requirement, in this embodiment, the airtight insulating film 6 is formed with a gap 5C.
This is inserted into the O-ring 7 and 9 to create an airtight structure, thereby preventing deterioration of high frequency characteristics.
なお、本発明は上述した一実施例に限定されるものでは
なく、要旨を逸脱しない範囲において種々変形実施が可
能なことは勿論である。It should be noted that the present invention is not limited to the one embodiment described above, and it goes without saying that various modifications can be made without departing from the scope of the invention.
［発明の効果］
以上説明したように本発明は、導波管入力端にチョーク
構造のフランジを設けることにより、機械的歪を生ぜず
、安定した特性でしかも高周波特性の劣化を有効に防止
する効果がある。[Effects of the Invention] As explained above, the present invention provides stable characteristics without causing mechanical distortion by providing a flange with a choke structure at the waveguide input end, and effectively prevents deterioration of high frequency characteristics. effective.
：ｊＳ１図は本発明の一実施例に係る低雑音増幅器の断
面図、：５２図は従来例を示す断面図である。
ｌ：増幅器本体 ２：支持台３：筐体
４：入力導波管５：チョーク形フランジ
６：気密用絶縁膜７：０リングFigure :jS1 is a cross-sectional view of a low-noise amplifier according to an embodiment of the present invention, and Figure :52 is a cross-sectional view of a conventional example. l: Amplifier body 2: Support stand 3: Housing
4: Input waveguide 5: Choke type flange
6: Airtight insulation film 7: 0 ring
Claims (2)
幅器において、上記入力端にチョーク形の非接触フラン
ジを設けたことを特徴とする低雑音増幅器。(1) A microwave band low noise amplifier having a waveguide input end, characterized in that a choke-shaped non-contact flange is provided at the input end.
縁性膜が挿入されており、上記入力端を閉塞するもので
あることを特徴とした特許請求の範囲第１項記載の低雑
音増幅器。(2) The low-noise amplifier according to claim 1, wherein the choke-shaped non-contact flange has an insulating film inserted into the gap to close the input end. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27470487A JPH01119101A (en) | 1987-10-31 | 1987-10-31 | Amplifier with low noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27470487A JPH01119101A (en) | 1987-10-31 | 1987-10-31 | Amplifier with low noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01119101A true JPH01119101A (en) | 1989-05-11 |
Family
ID=17545397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27470487A Pending JPH01119101A (en) | 1987-10-31 | 1987-10-31 | Amplifier with low noise |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01119101A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03120101U (en) * | 1990-03-20 | 1991-12-10 | ||
| JP2005020415A (en) * | 2003-06-26 | 2005-01-20 | Kyocera Corp | Connection structure of dielectric waveguide line and waveguide, and antenna device and filter device using its structure |
| WO2012060154A1 (en) * | 2010-11-02 | 2012-05-10 | 日立マクセル株式会社 | Radio frequency device module and method for sealing radio frequency device from outside air |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746501A (en) * | 1980-09-04 | 1982-03-17 | Nec Corp | Heat insulating device of waveguide |
-
1987
- 1987-10-31 JP JP27470487A patent/JPH01119101A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746501A (en) * | 1980-09-04 | 1982-03-17 | Nec Corp | Heat insulating device of waveguide |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03120101U (en) * | 1990-03-20 | 1991-12-10 | ||
| JP2005020415A (en) * | 2003-06-26 | 2005-01-20 | Kyocera Corp | Connection structure of dielectric waveguide line and waveguide, and antenna device and filter device using its structure |
| WO2012060154A1 (en) * | 2010-11-02 | 2012-05-10 | 日立マクセル株式会社 | Radio frequency device module and method for sealing radio frequency device from outside air |
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