JPH08181507A - Microwave attenuator - Google Patents

Microwave attenuator

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Publication number
JPH08181507A
JPH08181507A JP31890994A JP31890994A JPH08181507A JP H08181507 A JPH08181507 A JP H08181507A JP 31890994 A JP31890994 A JP 31890994A JP 31890994 A JP31890994 A JP 31890994A JP H08181507 A JPH08181507 A JP H08181507A
Authority
JP
Japan
Prior art keywords
radio wave
waveguide
absorbing body
attenuator
absorbing
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.)
Withdrawn
Application number
JP31890994A
Other languages
Japanese (ja)
Inventor
Kazuo Sato
和夫 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokogawa Denshikiki Co Ltd
Original Assignee
Yokogawa Denshikiki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yokogawa Denshikiki Co Ltd filed Critical Yokogawa Denshikiki Co Ltd
Priority to JP31890994A priority Critical patent/JPH08181507A/en
Publication of JPH08181507A publication Critical patent/JPH08181507A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE: To facilitate adjustment of output power or attenuation of the inexpensive attenuator with excellent characteristic such as a VSWR (voltage standing wave ratio) by sticking a radio wave absorbing body onto a face having a magnetic field inside a square waveguide. CONSTITUTION: A radio wave absorbing body 7 is sticked to an inner face of an H plane wall at an optional position between a flange 2 at an opening side of a waveguide 1 and a gun diode 4 to form an attenuator 8. Then an electromagnetic wave is propagated inside the waveguide 1 from a position of the gun diode 4 in a direction of the flange 2. Lines of electric force and magnetic force passing through the absorbing body 7 are absorbed to a part of the waveguide 1 to which the absorbing body 7 is sticked, resulting that the propagated electromagnetic is attenuated. When the absorbing body 7 is fitted to an H plane (upper magnetic field face) of the waveguide 1, a degree of the electromagnetic wave absorbed by the absorbing body 7 is proportional to the thickness of the absorbing body 7. Thus, the attenuation is dependent on the thickness of the absorbing body 7.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、マイクロ波の電力を
減衰させるための、特に導波管による伝送路に適したマ
イクロ波アッテネータに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave attenuator for attenuating microwave power, which is particularly suitable for a waveguide-based transmission line.

【0002】[0002]

【従来の技術】近年、マイクロ波帯電波(およそ1GH
z以上の電波)の発振には、様々な発振素子が用いられ
ている。中でも半導体を利用した発振方法は、比較的低
い電圧で連続発振出力が得られるため、特に無線通信分
野で多く用いられている。
2. Description of the Related Art In recent years, microwave charged waves (about 1 GHz
Various oscillation elements are used for oscillation of radio waves of z or more). Above all, the oscillation method using a semiconductor is widely used especially in the field of wireless communication because a continuous oscillation output can be obtained at a relatively low voltage.

【0003】ところで、上述のような半導体によるマイ
クロ波発振回路では、その発振原理上、発振出力電力の
調整が難しい。即ち、供給する電源やバイアスの電圧を
下げると、発振が不安定になったり歪んだり、停止して
しまう。そこで一般に、マイクロ波伝送路にアッテネー
タ(減衰器)を挿入して、マイクロ波電力を調整する方
法が用いられる。
In the microwave oscillating circuit made of a semiconductor as described above, it is difficult to adjust the oscillation output power due to its oscillation principle. That is, if the power supply or bias voltage supplied is lowered, oscillation becomes unstable, distorted, or stopped. Therefore, generally, a method of inserting an attenuator (attenuator) into the microwave transmission line to adjust the microwave power is used.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、マイク
ロ波は周波数が高い上に、マイクロ波の伝送には導波管
が多く用いられるために、従来のマイクロ波アッテネー
タは極めて高価で、これを組み込む製品のコスト上昇を
招いてしまうという問題が生じた。本発明は上述のよう
な背景の下になされたもので、安価でVSWR(電圧定
在波比)等の特性が優れており、出力電力あるいは減衰
量の調整が容易なマイクロ波アッテネータを提供するこ
とを目的としている。
However, since the microwave has a high frequency and a waveguide is often used for transmitting the microwave, the conventional microwave attenuator is extremely expensive and a product incorporating the microwave attenuator. There was a problem that this would lead to an increase in costs. The present invention has been made under the background as described above, and provides a microwave attenuator which is inexpensive, has excellent characteristics such as VSWR (voltage standing wave ratio), and whose output power or attenuation amount can be easily adjusted. Is intended.

【0005】[0005]

【課題を解決するための手段】上述した課題を解決する
ために請求項1に記載の発明にあっては、マイクロ波帯
の電波を伝送する電波伝送手段と、前記電波を吸収する
薄い板状の電波吸収手段とを具備し、前記電波伝送手段
は方形導波管から構成され、前記電波吸収手段は前記電
波伝送手段内部の磁界面に取り付けられ、前記電波吸収
手段の厚さによって減衰量が決定されることを特徴とす
る。
In order to solve the above-mentioned problems, according to the invention of claim 1, a radio wave transmission means for transmitting radio waves in the microwave band and a thin plate shape for absorbing the radio waves. Radio wave absorbing means, the radio wave transmitting means is composed of a rectangular waveguide, the radio wave absorbing means is attached to a magnetic field surface inside the radio wave transmitting means, and an attenuation amount depends on the thickness of the radio wave absorbing means. It is characterized by being decided.

【0006】また請求項2に記載の発明にあっては、マ
イクロ波帯の電波を伝送する電波伝送手段と、前記電波
を吸収する薄い板状の電波吸収手段とを具備し、前記電
波伝送手段は方形導波管から構成され、前記電波伝送手
段は電界面の一部に前記電波吸収手段が該電波吸収手段
の面方向に挿入される挿入口を有し、前記電波吸収手段
は前記挿入口に前記電波伝送手段の磁界面と平行するよ
うに摺動可能に挿入され、前記電波吸収手段の挿入量に
よって減衰量が決定されることを特徴とする。
According to a second aspect of the present invention, there is provided a radio wave transmission means for transmitting radio waves in the microwave band, and a thin plate-shaped radio wave absorption means for absorbing the radio waves. Is a rectangular waveguide, and the radio wave transmission means has an insertion opening in a part of the electric field surface in which the radio wave absorption means is inserted in the surface direction of the radio wave absorption means, and the radio wave absorption means is the insertion opening. Is slidably inserted in parallel with the magnetic field surface of the radio wave transmission means, and the amount of attenuation is determined by the insertion amount of the radio wave absorption means.

【0007】また請求項3に記載の発明にあっては、マ
イクロ波帯の電波を伝送する電波伝送手段と、前記電波
を吸収する薄い板状の電波吸収手段とを具備し、前記電
波伝送手段は円形導波管から構成され、前記電波伝送手
段は外周面の一部に前記電波吸収手段が該電波吸収手段
の面方向に挿入される挿入口を有し、前記電波吸収手段
は前記挿入口に前記電波伝送手段の半径方向に摺動可能
に挿入され、前記電波吸収手段の挿入量によって減衰量
が決定されることを特徴とする。
According to another aspect of the invention, there is provided a radio wave transmission means for transmitting radio waves in the microwave band and a thin plate-shaped radio wave absorption means for absorbing the radio waves. Is composed of a circular waveguide, and the radio wave transmission means has an insertion opening in a part of the outer peripheral surface into which the radio wave absorption means is inserted in the surface direction of the radio wave absorption means, and the radio wave absorption means is the insertion opening. Is inserted slidably in the radial direction of the radio wave transmission means, and the attenuation amount is determined by the insertion amount of the radio wave absorption means.

【0008】[0008]

【作用】請求項1に記載の発明は、方形導波管から構成
された電波伝送手段内部の磁界面に薄い板状の電波吸収
手段が取り付けられ、電波吸収手段の厚さによって減衰
量が決定される。請求項2に記載の発明は、方形導波管
から構成された電波伝送手段の電界面の一部に薄い板状
の電波吸収手段が該電波吸収手段の面方向に挿入される
挿入口を有し、挿入口に電波伝送手段の磁界面と平行す
るように摺動可能に挿入される電波吸収手段の挿入量に
よって減衰量が決定される。請求項3に記載の発明は、
円形導波管から構成された電波伝送手段の外周面の一部
に薄い板状の電波吸収手段が該電波吸収手段の面方向に
挿入される挿入口を有し、挿入口に電波伝送手段の半径
方向に摺動可能に挿入される電波吸収手段の挿入量によ
って減衰量が決定される。
According to the first aspect of the invention, a thin plate-shaped radio wave absorbing means is attached to the magnetic field surface inside the radio wave transmitting means composed of a rectangular waveguide, and the attenuation amount is determined by the thickness of the radio wave absorbing means. To be done. According to a second aspect of the present invention, a thin plate-shaped radio wave absorbing means is provided in a part of the electric field surface of the radio wave transmitting means composed of a rectangular waveguide so as to have an insertion opening in the plane direction of the radio wave absorbing means. Then, the amount of attenuation is determined by the amount of insertion of the radio wave absorber that is slidably inserted into the insertion port so as to be parallel to the magnetic field surface of the radio wave transmission unit. The invention according to claim 3 is
A thin plate-shaped radio wave absorbing means has an insertion port inserted in the plane direction of the radio wave absorbing means in a part of the outer peripheral surface of the radio wave transmitting means composed of a circular waveguide, and the radio wave transmitting means has an insertion port. The amount of attenuation is determined by the amount of insertion of the radio wave absorber that is slidably inserted in the radial direction.

【0009】[0009]

【実施例】以下に図面を参照して、本発明の一実施例に
ついて説明する。 A.第1の実施例 図1は、本発明の第1の実施例にかかるマイクロ波アッ
テネータの構成を示す側断面図である。本実施例では、
JIS形名WRJ−10(内側寸法:幅22.9mm、
高さ10.2mm)とガン・ダイオード(電圧−電流特
性の一部に負性抵抗領域を有するダイオード)とを用い
た10.5GHzの発振器に適用した例を示す。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A. First Embodiment FIG. 1 is a side sectional view showing a structure of a microwave attenuator according to a first embodiment of the present invention. In this embodiment,
JIS model name WRJ-10 (inside dimension: width 22.9 mm,
An example applied to an oscillator of 10.5 GHz using a height of 10.2 mm) and a Gunn diode (a diode having a negative resistance region in a part of voltage-current characteristics) is shown.

【0010】図1において1は、導波管(方形導波管)
である。この導波管1の向かい合ったH面(磁界面)の
幅方向の中央部には、それぞれ円筒形のダイオード・マ
ウント3a、3bが形成されている。ダイオード・マウ
ント3aの内部には、やはり円筒形の絶縁物3cが嵌合
している。一方のダイオード・マウント3bの内面には
螺旋が形成されており、ここに金属のネジ3dが螺合す
る。このネジ3dを締めることにより絶縁物3cとのと
の間にガン・ダイオード4が取り付けられ、ガン・ダイ
オード4には電極5を介して励振電圧が印加される。ま
た、導波管1の一端部は開口しているとともに取り付け
用のフランジ2が形成されており、他端部は短絡壁6に
より閉鎖されている。このため、ガン・ダイオード4に
よる発振周波数は、短絡壁6とガン・ダイオード4との
距離lによって決定される。
In FIG. 1, reference numeral 1 denotes a waveguide (square waveguide).
Is. Cylindrical diode mounts 3a and 3b are formed in the central portions in the width direction of the H surfaces (magnetic field surfaces) facing each other of the waveguide 1. A cylindrical insulator 3c is also fitted inside the diode mount 3a. A spiral is formed on the inner surface of one diode mount 3b, and a metal screw 3d is screwed into the spiral. By tightening the screw 3d, the gun diode 4 is attached between the gun diode 4 and the insulator 3c, and the excitation voltage is applied to the gun diode 4 through the electrode 5. Further, one end of the waveguide 1 is open and a mounting flange 2 is formed, and the other end is closed by a short-circuit wall 6. Therefore, the oscillation frequency of the Gunn diode 4 is determined by the distance 1 between the short-circuit wall 6 and the Gunn diode 4.

【0011】導波管1の、開口側のフランジ2とガン・
ダイオード4との間の任意の位置のH面壁の内面には電
波吸収体7が貼り付けられており、この部分がアッテネ
ータ8を形成している。図2に電波吸収体7の外観の一
例を示す。電波吸収体には、様々な材質のものが開発さ
れている。このうち本実施例では、カーボニール鉄の粉
末を、エポキシ樹脂をバインダーとして固めたものを使
用した。また、図2に示した電波吸収体7の幅W、およ
び長さLは、本実施例ではそれぞれ10mmとした。
The flange 2 on the opening side of the waveguide 1 and the gun
A radio wave absorber 7 is attached to the inner surface of the H-plane wall at an arbitrary position between the diode 4 and this portion, and this portion forms an attenuator 8. FIG. 2 shows an example of the appearance of the radio wave absorber 7. Various materials have been developed for the radio wave absorber. Of these, in this example, a powder of carbonyl iron was used, which was hardened with an epoxy resin as a binder. Further, the width W and the length L of the radio wave absorber 7 shown in FIG.

【0012】図3は、導波管1内を伝搬する電磁波のモ
デル図である。ここで図3(a)は、H面(上部磁界
面)およびE面(電界面)から見た図である。また、図
3(b)は図3(a)におけるA-A'断面矢視図、図3
(c)はB-B'断面矢視図である。これらの図中、実線
矢印は電気力線Eを破線矢印は磁力線Hを、また1点鎖
線矢印は電流Iの方向を示している。
FIG. 3 is a model diagram of electromagnetic waves propagating in the waveguide 1. Here, FIG. 3A is a view seen from the H surface (upper magnetic field surface) and the E surface (electric field surface). 3B is a sectional view taken along the line AA ′ in FIG.
(C) is a BB 'cross section arrow line view. In these figures, the solid line arrow shows the electric force line E, the broken line arrow shows the magnetic force line H, and the one-dot chain line arrow shows the direction of the current I.

【0013】図1に示す導波管1内部においても、ガン
・ダイオード4の位置からフランジ2の方向へ、電磁波
が図3に示すモデルと同様に伝搬する。そこで、図1に
示すような導波管1における電波吸収体7が貼り付けら
れた部分では、電波吸収体7内を通過する電気力線およ
び磁力線が吸収され、この結果伝搬する電磁波が減衰す
る。また、電波吸収体7が導波管1のH面に取り付けら
れた場合、電磁波が電波吸収体7に吸収される度合い
は、図2に示すような電波吸収体7の厚さtに比例す
る。従って、電波吸収体7の厚さtによって、減衰量が
決定される。図4に、本実施例による電波吸収体7の厚
さtと減衰量Attとの関係を表したグラフを示す。
Inside the waveguide 1 shown in FIG. 1, electromagnetic waves propagate from the position of the Gunn diode 4 toward the flange 2 as in the model shown in FIG. Therefore, in the portion of the waveguide 1 where the radio wave absorber 7 is attached as shown in FIG. 1, the electric force lines and magnetic force lines passing through the radio wave absorber 7 are absorbed, and as a result, the propagating electromagnetic wave is attenuated. . When the wave absorber 7 is attached to the H surface of the waveguide 1, the degree of absorption of electromagnetic waves by the wave absorber 7 is proportional to the thickness t of the wave absorber 7 as shown in FIG. . Therefore, the attenuation amount is determined by the thickness t of the radio wave absorber 7. FIG. 4 is a graph showing the relationship between the thickness t and the attenuation amount Att of the radio wave absorber 7 according to this example.

【0014】ところで本実施例のように、内部高10.
2mmの導波管1のH面壁の内面に電波吸収体7を貼り
付ける場合、厚さの最大が1mm程度であれば、伝送路
(導波管1)のVSWRが大きく悪化することはない。
By the way, as in this embodiment, the internal height of 10.
When the radio wave absorber 7 is attached to the inner surface of the H surface wall of the waveguide 1 of 2 mm, the VSWR of the transmission line (waveguide 1) does not significantly deteriorate if the maximum thickness is about 1 mm.

【0015】なお、上述の第1の実施例ではガン・ダイ
オード4によるマイクロ波発振器が構成されている導波
管1の出力側にアッテネータ8が構成されている例を示
した。しかし、本発明が適用されるマイクロは発振素子
はガン・ダイオードに限定された物ではなく、この他イ
ンパット・ダイオードやマグネトロンのような電子管で
あってもよい。また、マイクロ波発振器の一部として構
成し、出力電力調整用アッテネータとする他、一定長の
導波管の内部に必要な厚さの電波吸収体を貼り付け、固
定減衰量のアッテネータとしてもよい。
In the first embodiment described above, the attenuator 8 is formed on the output side of the waveguide 1 in which the microwave oscillator including the Gunn diode 4 is formed. However, the oscillator to which the present invention is applied is not limited to the Gunn diode, but may be an electron tube such as an impatt diode or magnetron. In addition to constituting an attenuator for adjusting the output power by configuring as a part of the microwave oscillator, a wave absorber having a required thickness may be attached inside the waveguide of a certain length to provide an attenuator with a fixed attenuation amount. .

【0016】B.第2の実施例 図5は、本発明の第2の実施例にかかるマイクロ波アッ
テネータの概略構成図である。図5において11は導波
管(方形導波管)である。この導波管11のE面の中央
部には、挿入部13が設けられている。この挿入部13
には電波吸収体17が、導波管11のH面と平行かつ矢
印C方向に摺動可能に挿入され、これらが通過型のアッ
テネータ18を形成している。なお、電波吸収体17の
組成その他は、前述の電波吸収体7と同様であるが、厚
さtは十分に薄く、一定であるものとする。
B. Second Embodiment FIG. 5 is a schematic configuration diagram of a microwave attenuator according to a second embodiment of the present invention. In FIG. 5, reference numeral 11 is a waveguide (square waveguide). An insertion portion 13 is provided at the center of the E surface of the waveguide 11. This insertion part 13
A radio wave absorber 17 is inserted into the H-plane of the waveguide 11 so as to be slidable in the arrow C direction, and these form a pass-type attenuator 18. The composition of the radio wave absorber 17 and the like are the same as those of the radio wave absorber 7 described above, but the thickness t is assumed to be sufficiently thin and constant.

【0017】このアッテネータ18にあっては、電波吸
収体17の挿入量wが変化することにより、その通過減
衰量が変化する。具体的には図6に示すように、挿入量
wが大きくなるに従って、減衰量も大きくなる。従っ
て、電波吸収体17の挿入量wを可変できる構造とする
ことにより、減衰量可変型のアッテネータを構成するこ
とができる。
In this attenuator 18, when the insertion amount w of the radio wave absorber 17 changes, the passing attenuation amount changes. Specifically, as shown in FIG. 6, as the insertion amount w increases, the attenuation amount also increases. Therefore, by adopting a structure in which the insertion amount w of the radio wave absorber 17 can be changed, it is possible to configure a variable attenuation type attenuator.

【0018】なお、上述の第2の実施例では方形導波管
11にアッテネータ18を形成した例を示したが、円形
導波管にあっても本実施例と同様の効果が得られる。
In the second embodiment described above, the example in which the attenuator 18 is formed in the rectangular waveguide 11 is shown, but the same effect as in this embodiment can be obtained even in the circular waveguide.

【0019】[0019]

【発明の効果】以上説明したように本発明によれば、方
形導波管内部の磁界面に電波吸収体を貼り付けるだけの
簡単な構成で、貼り付けた電波吸収体の厚さに比例した
減衰量のマイクロ波アッテネータが実現可能である。ま
た、方形導波管の電界面または円形導波管の一部に電波
吸収体の挿入部を設け、電波吸収体の挿入量を可変する
だけの簡単な構成で、減衰量可変型のマイクロ波アッテ
ネータが実現可能である。
As described above, according to the present invention, a simple structure in which the electromagnetic wave absorber is attached to the magnetic field surface inside the rectangular waveguide is proportional to the thickness of the attached electromagnetic wave absorber. Attenuator microwave attenuator can be realized. In addition, a microwave attenuation attenuation type microwave is provided with a simple structure in which the electromagnetic wave absorber insertion part is provided on the electric field surface of the rectangular waveguide or a part of the circular waveguide and the insertion amount of the electromagnetic wave absorber is varied. Attenuator is feasible.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1の実施例にかかるマイクロ波アッ
テネータ8の構成を示す側断面図である。
FIG. 1 is a side sectional view showing a configuration of a microwave attenuator 8 according to a first embodiment of the present invention.

【図2】同実施例における電波吸収体7の概略構成を示
す外観図である。
FIG. 2 is an external view showing a schematic configuration of a radio wave absorber 7 in the embodiment.

【図3】導波管1内部を伝搬する電磁波の電気力線E、
磁力線Hおよび電流の方向Iを示すモデル図である。
FIG. 3 is a line of electric force E of an electromagnetic wave propagating inside the waveguide 1.
It is a model figure which shows the magnetic force line H and the direction I of an electric current.

【図4】本発明の第1実施例における、電波吸収体7の
厚さtと減衰量Attとの関係を示すグラフである。
FIG. 4 is a graph showing the relationship between the thickness t of the radio wave absorber 7 and the attenuation amount Att in the first embodiment of the present invention.

【図5】本発明の第2の実施例にかかるアッテネータ1
8の概略構成を示す外観図である。
FIG. 5 is an attenuator 1 according to a second embodiment of the present invention.
8 is an external view showing a schematic configuration of No. 8.

【図6】同実施例における電波吸収体の挿入量wと減衰
量との関係を示すグラフである。
FIG. 6 is a graph showing a relationship between an insertion amount w of a radio wave absorber and an attenuation amount in the example.

【符号の説明】[Explanation of symbols]

1 導波管 7 電波吸収体 8 アッテネータ 11 導波管 13 挿入部 17 電波吸収体 18 アッテネータ 1 Waveguide 7 Radio Wave Absorber 8 Attenuator 11 Waveguide 13 Insertion Part 17 Radio Wave Absorber 18 Attenuator

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 マイクロ波帯の電波を伝送する電波伝送
手段と、 前記電波を吸収する薄い板状の電波吸収手段とを具備
し、 前記電波伝送手段は方形導波管から構成され、 前記電波吸収手段は前記電波伝送手段内部の磁界面に取
り付けられ、 前記電波吸収手段の厚さによって減衰量が決定されるこ
とを特徴とするマイクロ波アッテネータ。
1. A radio wave transmission means for transmitting radio waves in the microwave band, and a thin plate-shaped radio wave absorption means for absorbing the radio waves, wherein the radio wave transmission means comprises a rectangular waveguide, The microwave attenuator, wherein the absorbing means is attached to the magnetic field surface inside the radio wave transmitting means, and the amount of attenuation is determined by the thickness of the radio wave absorbing means.
【請求項2】 マイクロ波帯の電波を伝送する電波伝送
手段と、 前記電波を吸収する薄い板状の電波吸収手段とを具備
し、 前記電波伝送手段は方形導波管から構成され、 前記電波伝送手段は電界面の一部に前記電波吸収手段が
該電波吸収手段の面方向に挿入される挿入口を有し、 前記電波吸収手段は前記挿入口に前記電波伝送手段の磁
界面と平行するように摺動可能に挿入され、 前記電波吸収手段の挿入量によって減衰量が決定される
ことを特徴とするマイクロ波アッテネータ。
2. A radio wave transmission means for transmitting radio waves in the microwave band, and a thin plate-shaped radio wave absorption means for absorbing the radio waves, wherein the radio wave transmission means is composed of a rectangular waveguide. The transmission means has an insertion opening in a part of the electric field surface in which the radio wave absorption means is inserted in the surface direction of the radio wave absorption means, and the radio wave absorption means is parallel to the magnetic field surface of the radio wave transmission means in the insertion opening. The microwave attenuator is slidably inserted as described above, and the attenuation amount is determined by the insertion amount of the radio wave absorbing means.
【請求項3】 マイクロ波帯の電波を伝送する電波伝送
手段と、 前記電波を吸収する薄い板状の電波吸収手段とを具備
し、 前記電波伝送手段は円形導波管から構成され、 前記電波伝送手段は外周面の一部に前記電波吸収手段が
該電波吸収手段の面方向に挿入される挿入口を有し、 前記電波吸収手段は前記挿入口に前記電波伝送手段の半
径方向に摺動可能に挿入され、 前記電波吸収手段の挿入量によって減衰量が決定される
ことを特徴とするマイクロ波アッテネータ。
3. A radio wave transmission means for transmitting radio waves in the microwave band, and a thin plate-shaped radio wave absorption means for absorbing the radio waves, wherein the radio wave transmission means comprises a circular waveguide. The transmission means has an insertion opening in a part of the outer peripheral surface into which the radio wave absorption means is inserted in the surface direction of the radio wave absorption means, and the radio wave absorption means slides in the insertion opening in the radial direction of the radio wave transmission means. A microwave attenuator which is inserted as much as possible and whose attenuation amount is determined by the insertion amount of the radio wave absorbing means.
JP31890994A 1994-12-21 1994-12-21 Microwave attenuator Withdrawn JPH08181507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31890994A JPH08181507A (en) 1994-12-21 1994-12-21 Microwave attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31890994A JPH08181507A (en) 1994-12-21 1994-12-21 Microwave attenuator

Publications (1)

Publication Number Publication Date
JPH08181507A true JPH08181507A (en) 1996-07-12

Family

ID=18104331

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31890994A Withdrawn JPH08181507A (en) 1994-12-21 1994-12-21 Microwave attenuator

Country Status (1)

Country Link
JP (1) JPH08181507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113241508A (en) * 2021-05-24 2021-08-10 中国电子科技集团公司第四十一研究所 Manual waveguide attenuation switching device, tester and switching method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113241508A (en) * 2021-05-24 2021-08-10 中国电子科技集团公司第四十一研究所 Manual waveguide attenuation switching device, tester and switching method
CN113241508B (en) * 2021-05-24 2021-11-26 中国电子科技集团公司第四十一研究所 Manual waveguide attenuation switching device, tester and switching method

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