JPH024162B2 - - Google Patents
Info
- Publication number
- JPH024162B2 JPH024162B2 JP6544584A JP6544584A JPH024162B2 JP H024162 B2 JPH024162 B2 JP H024162B2 JP 6544584 A JP6544584 A JP 6544584A JP 6544584 A JP6544584 A JP 6544584A JP H024162 B2 JPH024162 B2 JP H024162B2
- Authority
- JP
- Japan
- Prior art keywords
- terminator
- screw
- reflection
- waveguide
- matching
- 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
- 239000011358 absorbing material Substances 0.000 claims description 5
- 239000006096 absorbing agent Substances 0.000 claims 1
- 230000004323 axial length Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/24—Terminating devices
- H01P1/26—Dissipative terminations
- H01P1/264—Waveguide terminations
Landscapes
- Non-Reversible Transmitting Devices (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、マイクロ波およびミリ波で用いる
導波管形無反射終端器の改良に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a waveguide type non-reflection terminator used in microwave and millimeter waves.
導波管形無反射終端器は、導波管内を伝搬する
電磁波を反射なく吸収するもので立体回路用構成
部品としてよく用いられている。
A waveguide-type non-reflection terminator absorbs electromagnetic waves propagating within a waveguide without reflection, and is often used as a component for three-dimensional circuits.
第1図および第2図は、従来、方形導波管に用
いられている無反射終端器であり、前者はテーパ
形無反射終端器1、後者は多段形無反射終端器2
の一例を示す斜視図である。 Figures 1 and 2 show non-reflection terminators conventionally used for rectangular waveguides; the former is a tapered non-reflection terminator 1, and the latter is a multi-stage non-reflection terminator 2.
It is a perspective view showing an example.
これらの無反射終端器は、一般にはブロツク状
の固形電波吸収材から機械的に所要の形状寸法に
加工する方法が用いられており、その形状も種々
のものがある。しかし、種々の形状はあつてもこ
れらの無反射終端器は第1図、第2図中に示すよ
うに主として電磁波を吸収するための終端器一様
部3とインピーダンス整合のための終端器整合部
4とで基本的に構成されている。 These non-reflection terminators are generally manufactured by mechanically processing a block of solid electromagnetic wave absorbing material into the desired shape and dimensions, and there are various shapes. However, although there are various shapes, these non-reflection terminators mainly have a terminator uniform part 3 for absorbing electromagnetic waves and a terminator matching part for impedance matching, as shown in Figures 1 and 2. It basically consists of Section 4.
テーパ形無反射終端器1は、終端器整合部4の
軸長を約1波長以上とすることにより比較的広帯
域な電気的特性が得られる。また、多段形無反射
終端器2は、電気的特性は比較的狭帯域であるが
終端器整合部4の軸長が最短で管内波長の約4分
の1と短くできる。両者の選択は、所要条件によ
り決定されるがいずれの場合でも以下に示す欠点
があつた。 The tapered non-reflection terminator 1 can obtain relatively broadband electrical characteristics by making the axial length of the terminator matching section 4 approximately one wavelength or more. Further, although the multi-stage non-reflection terminator 2 has a relatively narrow band electrical characteristic, the axial length of the terminator matching section 4 can be shortened to about one quarter of the pipe wavelength at the shortest. The choice between the two is determined by the required conditions, but in either case there are drawbacks as shown below.
まず、テーパ形無反射終端器1の終端器整合部
4の形状は先端の鋭利なことが電気的に要求さ
れ、これを満たす加工が難しい欠点があつた。ま
た、加工後の取扱い、保管時にテーパ先端を破損
しやすい欠点もあつた。 First, the shape of the terminator matching portion 4 of the tapered non-reflective terminator 1 is electrically required to have a sharp tip, which has the drawback that processing that satisfies this requirement is difficult. Another drawback was that the tapered tip was easily damaged during handling and storage after processing.
つぎに、多段形無反射終端器2の終端器整合部
4の軸長は、整合周波数に大きな影響を及ぼすた
め、特にミリ波帯のような波長の短い周波数にお
いては加工誤差の影響を強くうけ所要の周波数帯
で整合させることが難しい欠点があつた。 Next, the axial length of the terminator matching part 4 of the multi-stage non-reflection terminator 2 has a large effect on the matching frequency, so it is particularly susceptible to processing errors at frequencies with short wavelengths such as the millimeter wave band. The drawback was that it was difficult to match in the required frequency band.
この発明は、かかる欠点を改善する目的でなさ
れたもので、終端器整合部にネジを用いることに
より整合周波数を容易に調整できる多段形無反射
終端器を提供するものである。
The present invention has been made to overcome these drawbacks, and provides a multi-stage non-reflection terminator in which the matching frequency can be easily adjusted by using screws in the terminator matching section.
第3図は、この発明の一実施例を示す斜視図で
あり、図中、5はネジであり、ネジ5と終端器一
様部3はネジ構造で接続しているためネジ5の突
出部軸長は容易に調整可能である。ネジ5は、終
端器整合部4と同一の機能を有するものである。
すなわち、ネジ5の主として先端部に生じる反射
波と終端器整合部4で生じる反射波とを使用周波
数帯で相殺するようにネジ5の材質、形状、位置
等を定めるものである。
FIG. 3 is a perspective view showing an embodiment of the present invention, and in the figure, 5 is a screw, and since the screw 5 and the terminator uniform part 3 are connected by a screw structure, the protrusion of the screw 5 The axial length is easily adjustable. The screw 5 has the same function as the terminator matching part 4.
That is, the material, shape, position, etc. of the screw 5 are determined so that the reflected wave mainly generated at the tip of the screw 5 and the reflected wave generated at the terminator matching part 4 cancel each other out in the frequency band used.
まず、ネジ5の材質は、金属、誘電体や電波吸
収材等のいずれでも可能である。すなわち、ネジ
5が金属の場合、終端器整合部4が使用周波数帯
にてしや断域になると先端に生じる反射が大き
く、整合できなくなる。このため、この場合には
金属にかわり、ネジの材質に誘電体や電波吸収材
が用いられる。 First, the material of the screw 5 can be any metal, dielectric, radio wave absorbing material, or the like. That is, when the screw 5 is made of metal, if the terminator matching section 4 reaches a low frequency range in the operating frequency band, the reflection generated at the tip becomes large and matching becomes impossible. Therefore, in this case, a dielectric or a radio wave absorbing material is used as the material for the screw instead of metal.
つぎに、ネジの形状は、第4図に示す他の実施
例のようにネジ5の径を異ならせることも考えら
れる。これは、従来からよく知られている多段形
インピーダンス整合に関するもので、径の異なつ
た部分の軸長はそれぞれ管内波長の約4分の1と
するもので、1段のものより広帯域特性が優れて
いる。このネジ5は、径の小さいネジと大きいネ
ジとを組み合わせた2重ネジであり、各径のネジ
が挿入された導波管部の管内波長が異なることに
対応して各径のネジの軸長をそれぞれ独立して調
整ができ、このため最適調整が容易である。 Next, regarding the shape of the screw, it is also possible to make the diameter of the screw 5 different as in another embodiment shown in FIG. This is a well-known multi-stage impedance matching method in which the axial length of each portion with a different diameter is approximately one-fourth of the wavelength in the tube, and it has better broadband characteristics than a single-stage one. ing. This screw 5 is a double screw that combines a screw with a small diameter and a screw with a large diameter, and the axis of the screw of each diameter is The lengths can be adjusted independently, making it easy to make optimal adjustments.
さらに、ネジ5の位置は、導波管の中央に限ら
ずネジの反射の大きさを考慮して、片側の管壁に
近づけることも可能である。これは、方形導波管
のTE10モード波の導波管横断面内の電界分布は
正弦分布をしていることによるもので、一般的に
ネジ5の反射は、管壁に近づけるほど小さくなる
傾向を示す。したがつてネジの位置は無反射終端
器の反射を小さくするように実験的に定めること
ができる。インピーダンス整合が実現されると終
端器一様部3で電波を十分吸収するためこの発明
による無反射終端器は従来の無反射終端器は従来
の無反射終端器と同様に良好な特性を得ることが
できる。 Furthermore, the position of the screw 5 is not limited to the center of the waveguide, but may be placed close to one side of the tube wall, taking into consideration the magnitude of reflection from the screw. This is because the electric field distribution of the TE 10 mode wave in the rectangular waveguide in the cross section of the waveguide has a sinusoidal distribution, and generally the reflection from the screw 5 becomes smaller as it gets closer to the tube wall. Show trends. Therefore, the position of the screw can be determined experimentally to reduce the reflection of the non-reflective terminator. When impedance matching is achieved, the uniform portion 3 of the terminator sufficiently absorbs the radio waves, so that the non-reflection terminator according to the present invention has good characteristics similar to the conventional non-reflection terminator. Can be done.
なお、上記実施例では、ネジは1段および2段
について説明したが、段数はこれに限らない。ま
た、円形導波管、楕円導波管、まゆ形導波管等他
の導波管に適用してもよい。さらに、電波吸収材
のネジと金属のネジとを組みあわせて2重ネジと
してもよい。 In addition, although the above-mentioned example explained the screw in one stage and two stages, the number of stages is not limited to this. Furthermore, the present invention may be applied to other waveguides such as circular waveguides, elliptical waveguides, and cocoon-shaped waveguides. Further, a screw made of radio wave absorbing material and a screw made of metal may be combined to form a double screw.
この発明は以上説明したとおり、インピーダン
ス整合部にネジを用いることにより、加工誤差に
より生じる中心周波数の変動をネジの軸長を調整
することにより容易に補正できる効果がある。
As explained above, the present invention has the advantage that by using a screw in the impedance matching section, fluctuations in the center frequency caused by machining errors can be easily corrected by adjusting the axial length of the screw.
第1図および第2図は、それぞれ従来のテーパ
形無反射終端器と多段形無反射終端器の斜視図、
第3図はこの発明の一実施例を示す多段形無反射
終端器の斜視図、第4図はこの発明の他の実施例
を示す多段形無反射終端器の斜視図である。
図において、1はテーパ形無反射終端器、2は
多段形無反射終端器、3は終端器一様部、4は終
端器整合部、5はネジである。なお、図中同一符
号は同一または相当部分を示すものとする。
Figures 1 and 2 are perspective views of a conventional tapered non-reflective terminator and a multi-stage non-reflective terminator, respectively;
FIG. 3 is a perspective view of a multi-stage non-reflective terminator showing one embodiment of the invention, and FIG. 4 is a perspective view of a multi-stage non-reflective terminator showing another embodiment of the invention. In the figure, 1 is a tapered non-reflective terminator, 2 is a multi-stage non-reflective terminator, 3 is a terminator uniform part, 4 is a terminator matching part, and 5 is a screw. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
用いた導波管用多段形無反射終端器において、前
記電波吸収体端にネジを管軸方向に約4分の1波
長突出させたことを特徴とする無反射終端器。 2 異なる径のネジを複数個組み合わせた2重ネ
ジを用いた特許請求第1項記載の無反射終端器。[Claims] 1. In a multi-stage non-reflection terminator for a waveguide using a radio wave absorbing material that fills the entire cross section of the waveguide, a screw is inserted at the end of the radio wave absorber about a quarter of the way in the tube axis direction. A non-reflection terminator characterized by one wavelength protruding. 2. The non-reflection terminator according to claim 1, which uses a double screw that is a combination of a plurality of screws with different diameters.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6544584A JPS60210002A (en) | 1984-04-02 | 1984-04-02 | Resistive terminator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6544584A JPS60210002A (en) | 1984-04-02 | 1984-04-02 | Resistive terminator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60210002A JPS60210002A (en) | 1985-10-22 |
JPH024162B2 true JPH024162B2 (en) | 1990-01-26 |
Family
ID=13287338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6544584A Granted JPS60210002A (en) | 1984-04-02 | 1984-04-02 | Resistive terminator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60210002A (en) |
-
1984
- 1984-04-02 JP JP6544584A patent/JPS60210002A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS60210002A (en) | 1985-10-22 |
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