JPS6364923B2 - - Google Patents
Info
- Publication number
- JPS6364923B2 JPS6364923B2 JP55141082A JP14108280A JPS6364923B2 JP S6364923 B2 JPS6364923 B2 JP S6364923B2 JP 55141082 A JP55141082 A JP 55141082A JP 14108280 A JP14108280 A JP 14108280A JP S6364923 B2 JPS6364923 B2 JP S6364923B2
- Authority
- JP
- Japan
- Prior art keywords
- waveguide opening
- reflecting plate
- reflector
- waveguide
- dielectric
- 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
- 239000002184 metal Substances 0.000 claims description 6
- 210000000554 iris Anatomy 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003989 dielectric material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/185—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces wherein the surfaces are plane
Landscapes
- Aerials With Secondary Devices (AREA)
Description
【発明の詳細な説明】
この発明は小反射板及びインピーダンス整合用
整合素子を一体化して取り付けたシヨートバツク
フアイアアンテナに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a short backfire antenna in which a small reflector and a matching element for impedance matching are integrally attached.
なお、一般にシヨートバツクフアイヤアンテナ
とは１次放射器、小反射板、および縦横に約２波
長程度の大きさで外周に側板を備えた大反射板を
有し、一次放射器のみの場合よりも狭いビーム幅
が得られるものであり、ここでは説明の便宜上１
次放射器である導波管開口は方形導波管開口と
し、基本モードで励振されているものとする。ま
た小反射板及び大反射板の形状は円形平板として
説明する。 In general, a short backfire antenna has a primary radiator, a small reflector, and a large reflector that is about 2 wavelengths in length and width and has a side plate on the outer periphery. For convenience of explanation, we will use the beam width narrower than 1.
The waveguide opening, which is the secondary radiator, is a rectangular waveguide opening and is excited in the fundamental mode. Further, the shapes of the small reflector and the large reflector will be explained as circular flat plates.
まず第１図に示す従来のシヨートバツクフアイ
アアンテナについて簡単に説明する。 First, the conventional short-backfire antenna shown in FIG. 1 will be briefly explained.
第１図は従来のシヨートバツクフアイアアンテ
ナを示す構造図であり、第１図において１は大反
射板、２は側板、３は給電用方形導波管、４は１
次放射器である導波管開口部、５ａ，５ｂは整合
素子であるアイリス、６は小反射板、７は小反射
板支持台である。 Fig. 1 is a structural diagram showing a conventional short backfire antenna.
A waveguide opening is a secondary radiator, 5a and 5b are matching elements, irises, 6 is a small reflector, and 7 is a small reflector support.
このアンテナにおいて、導波管開口部４から空
間に放射された電波は小反射板６により後方に反
射、散乱される。そしてこの反射、散乱された電
波は大反射板１および側板２により再びアンテナ
前方へ反射される。このとき、大反射板１の直径
を約２波長、方形導波管開口部４の大反射板から
の高さを約４分の１波長に選び、側板２の高さhs
及び小反射板５の直径DR、高さhRを調節して適
当な寸法に設定することによりビーム幅が導波管
開口単体のときよりも狭く、かつサイドローブレ
ベルが低い、高利得で簡単な構造を有するアンテ
ナが得られる。シヨートバツクフアイアアンテに
おいて、hRは通常0.7波長以下である。 In this antenna, radio waves radiated into space from the waveguide opening 4 are reflected and scattered backward by the small reflecting plate 6. The reflected and scattered radio waves are reflected again in front of the antenna by the large reflector 1 and the side plates 2. At this time, the diameter of the large reflecting plate 1 is selected to be approximately 2 wavelengths, the height of the rectangular waveguide opening 4 from the large reflecting plate is selected to be approximately 1/4 wavelength, and the height of the side plate 2 is set to hs.
By adjusting the diameter DR and height hR of the small reflector 5 and setting them to appropriate dimensions, the beam width is narrower than when using a single waveguide aperture, and the side lobe level is low, making it easy to achieve high gain. An antenna having a structure is obtained. In short backfire antennas, h R is usually less than 0.7 wavelength.
小反射板６は導波管開口部４の上方に固定する
必要があり、簡単な方法としてアンテナの放射特
性を乱さないように低誘電率、低損失の材料で作
られた第１図の７で示したような支持台上に固定
する方法が用いられている。 The small reflector 6 needs to be fixed above the waveguide opening 4, and a simple method is to use a small reflector 6 made of a material with a low dielectric constant and low loss so as not to disturb the radiation characteristics of the antenna. A method of fixing it on a support base as shown in is used.
この小反射板は導波管開口の直前に置かれてい
るので給電導波管へ入射する反射波が大きくな
り、インピーダンスの不整合を生ずる。そこで導
波管開口部付近にアイリス５ａ，５ｂを取り付け
てインピーダンス整合がとられている。 Since this small reflection plate is placed just in front of the waveguide opening, the reflected wave incident on the feeding waveguide becomes large, causing an impedance mismatch. Therefore, impedance matching is achieved by attaching irises 5a and 5b near the waveguide opening.
このような従来のシヨートバツクフアイアアン
テナでは小反射板６の設定及びアイリス５ａ，５
ｂの取り付けという２段階の作業があり、アンテ
ナを多数製作する際には作業が複雑になり、工程
数が増えるという欠点があつた。またアイリス５
ａ，５ｂの調製に手間がかかり、同一特性のアン
テナを多数得るまでに多くの時間を費すという欠
点も有していた。 In such a conventional short backfire antenna, the setting of the small reflector 6 and the iris 5a, 5
There is a two-step process of attaching antennas b, which has the drawback of complicating the process and increasing the number of steps when manufacturing a large number of antennas. Iris 5 again
It also has the disadvantage that it takes a lot of time to prepare antennas a and 5b, and it takes a lot of time to obtain a large number of antennas with the same characteristics.
この発明はこれらの欠点を除去するために小反
射板と支持台及びアイリスを一体化して構成した
もので、以下図面によりこの発明の一実施例につ
いて説明する。 In order to eliminate these drawbacks, the present invention is constructed by integrating a small reflector, a support stand, and an iris.One embodiment of the present invention will be described below with reference to the drawings.
第２図はこの発明によるシヨートバツクフアイ
アアンテナの構成を示す図で、１は大反射板、２
は側板、３は給電用方形導波管、６は小反射板、
７は小反射板支持誘電体である誘電体円錐台、８
は円形平面部、９は誘電体ビスである。第３図は
第２図中に示した誘電体円錐台７の構成を示す図
で、５ａ，５ｂはアイリス１０は直方体部であ
る。誘電体円錐台７は低誘電率、低損失の誘電体
で作られており、その円形平面部８及び直方体部
にはそれぞれ小反射板６、アイリス５ａ，５ｂが
蒸着されている。導波管開口部の前部には誘電体
があるので、そのインピーダンスに及ぼす影響も
考慮してアイリスの寸法を決定してある。この小
反射板６と支持台及びアイリス５ａ，５ｂが一体
化された誘電体円錐台７を導波管開口部４に挿入
し、誘電体ビス９で固定することによつてインピ
ーダンス整合のとれた、簡単な構造を有するシヨ
ートバツクフアイアアンテナが得られる。 FIG. 2 is a diagram showing the configuration of a short backfire antenna according to the present invention, in which 1 is a large reflector, 2
is a side plate, 3 is a rectangular waveguide for power feeding, 6 is a small reflection plate,
7 is a dielectric truncated cone which is a small reflective plate supporting dielectric; 8
9 is a circular plane portion, and 9 is a dielectric screw. FIG. 3 is a diagram showing the structure of the dielectric truncated cone 7 shown in FIG. 2, and the iris 10 5a and 5b is a rectangular parallelepiped. The dielectric truncated cone 7 is made of a dielectric material with a low dielectric constant and low loss, and a small reflective plate 6 and irises 5a, 5b are deposited on the circular plane part 8 and the rectangular parallelepiped part, respectively. Since there is a dielectric material in front of the waveguide opening, the dimensions of the iris are determined by taking into account its influence on impedance. Impedance matching is achieved by inserting the dielectric truncated cone 7, in which the small reflector 6, the support stand, and the irises 5a and 5b are integrated, into the waveguide opening 4 and fixing it with dielectric screws 9. , a short backfire antenna with a simple structure is obtained.
この方法によれば小反射板の支持及びアイリス
の設定という２段階の工程を経ないで、簡単に、
かつ短時間でシヨートバツクフアイアアンテナを
組み立てられるという利点がある。また、導波管
開口部が誘電体円錐台によつて蓋がしてあるので
水滴が導波管内に入るのを防止できるという効果
もある。 According to this method, there is no need to go through the two-step process of supporting the small reflector and setting the iris.
Another advantage is that the short backfire antenna can be assembled in a short time. Furthermore, since the waveguide opening is covered with a dielectric truncated cone, it is possible to prevent water droplets from entering the waveguide.
なお、以上は小反射板及びアイリスを蒸着した
誘電体円錐台を導波管開口部に挿入し誘電体ビス
で固定する場合について説明したが、この発明は
これに限らず、小反射板のみを蒸着した誘電体円
錐台を導波管開口部に挿入し、金属ビスで固定し
た場合についても全く同様にして実施できる。こ
の場合、導波管開口部内に突出した金属ビスは上
記アイリスと同様にサセプタンス素子として動作
するので、この金属ビスの導波管開口部内に突出
する部分の長さを調整することによりこれを整合
素子として利用できる。また、誘電体円錐台に使
用する誘電体が低誘電率の場合について説明した
が、比較的高い誘電率の誘電体を用いて小反射板
を蒸着した誘電体円錐台を構成し導波管開口へ挿
入した、誘電体ホーン形式の１次放射器を使用し
た場合についても全く同様にして実施できる。さ
らに小反射板及び大反射板の形状を長方形や楕円
形など任意の形状にした場合や、給電導波管に円
形導波管を用いた場合や、給電用方形導波管を交
差させて開口を十字にして円偏波を放射するシヨ
ートバツクフアイアアンテナとした場合について
も全く同様にして実施できる。 In addition, although the case where the dielectric truncated cone on which the small reflector and iris are vapor-deposited is inserted into the waveguide opening and fixed with dielectric screws has been described above, the present invention is not limited to this, and it is possible to insert only the small reflector. In the case where a vapor-deposited dielectric truncated cone is inserted into the waveguide opening and fixed with metal screws, it can be carried out in exactly the same manner. In this case, the metal screw protruding into the waveguide opening acts as a susceptance element like the iris, so this can be matched by adjusting the length of the part of the metal screw protruding into the waveguide opening. Can be used as an element. In addition, although we have explained the case where the dielectric used for the dielectric truncated cone has a low dielectric constant, we have also explained the case in which the dielectric truncated cone is constructed using a dielectric with a relatively high permittivity and a small reflector is deposited, and the waveguide opening is It can be carried out in exactly the same way when using a dielectric horn type primary radiator inserted into the radiator. Furthermore, when the small reflector and large reflector are made into arbitrary shapes such as rectangles or ellipses, when a circular waveguide is used as the feeding waveguide, or when rectangular feeding waveguides are crossed and the opening is It can be carried out in exactly the same way even when the antenna is made into a cross and a short backfire antenna is used to radiate circularly polarized waves.
以上説明したようにこの発明によれば構造が簡
単で製作が容易であり、同一特性のシヨートバツ
クフアイアアンテナを少い工程で多数製作でき、
また小反射板の設けられた誘電体を、開口導波管
内に突出するようにした金属ビスにより固定した
ので容易にインピーダンス調整ができるという点
で大きな効果がある。 As explained above, according to the present invention, the structure is simple and easy to manufacture, and a large number of short backfire antennas with the same characteristics can be manufactured in a few steps.
Furthermore, since the dielectric body provided with the small reflector is fixed with metal screws that protrude into the aperture waveguide, there is a great effect in that the impedance can be easily adjusted.
第１図は従来のシヨートバツクフアイアアンテ
ナの構造図、第２図はこの発明によるシヨートバ
ツクフアイアアンテナの一実施例を示す構造図、
第３図はこの発明による誘電体円錐台の構造図、
図中、１は大反射板、２は側板、３は給電用方形
導波管、４は方形導波管開口部、５ａ，５ｂはア
イリス、６は小反射板、７は誘電体円錐台、８は
円形平面図、９は誘電体ビス、１０は直方体部で
ある。なお、図中同一あるいは相当部分には同一
符号を付してある。
Fig. 1 is a structural diagram of a conventional short backfire antenna, and Fig. 2 is a structural diagram showing an embodiment of a short backfire antenna according to the present invention.
FIG. 3 is a structural diagram of a dielectric truncated cone according to the present invention.
In the figure, 1 is a large reflector, 2 is a side plate, 3 is a rectangular waveguide for feeding, 4 is a rectangular waveguide opening, 5a, 5b are iris, 6 is a small reflector, 7 is a dielectric truncated cone, 8 is a circular plan view, 9 is a dielectric screw, and 10 is a rectangular parallelepiped portion. In addition, the same reference numerals are given to the same or corresponding parts in the figures.
Claims (1)
導波管開口部に設けられたインピーダンス整合用
整合素子と、上記導波管開口部の後方約0.25波長
の位置に上記導波管開口部と平行に設けられた２
波長程度の大きさの平板の大反射板と、上記大反
射板の外周に大反射板と垂直に設けられた側板
と、上記導波管開口及び上記大反射板と平行に対
向して設けられた平板の小反射板と、上記小反射
板を支持する誘電体とを備え、上記インピーダン
ス整合用整合素子と小反射板及び誘電体を一体化
して上記導波管開口部に挿入し、上記大反射板か
ら上記小反射板までの高さが0.7波長以下となる
ように設けたことを特徴とするシヨートバツクフ
アイアアンテナ。 ２ 一次放射器を構成する導波管開口部と、上記
導波管開口部に、その導波管内に突出するように
設けられたインピーダンス整合用の金属ビスと、
上記導波管開口部の後方約0.25波長の位置に上記
導波管開口部と平行に設けられた２波長程度の大
きさの平板の大反射板と、上記大反射板の外周に
大反射板と垂直に設けられた側板と、上記導波管
開口及び上記大反射板に対向し、かつ平行に設け
られた平板の小反射板と、上記小反射板と上記誘
電体とを一体化して上記導波管開口部に挿入する
とともに上記金属ビスにより固定し、上記大反射
板から上記小反射板の高さが0.7波長以下となる
ように設けたことを特徴とするシヨートバツクフ
アイアアンテナ。[Claims] 1. A waveguide opening constituting a primary radiator, an impedance matching matching element provided in the waveguide opening, and a position approximately 0.25 wavelength behind the waveguide opening. 2 provided parallel to the waveguide opening in
A flat large reflecting plate having a size approximately equal to the wavelength, a side plate provided perpendicularly to the large reflecting plate on the outer periphery of the large reflecting plate, and a side plate provided facing the waveguide opening and parallel to the large reflecting plate. The impedance matching matching element, the small reflector, and the dielectric are integrated into the waveguide opening, and the large reflector is inserted into the waveguide opening. A short backfire antenna characterized in that the height from the reflector to the small reflector is 0.7 wavelength or less. 2. A waveguide opening constituting a primary radiator; a metal screw for impedance matching provided in the waveguide opening so as to protrude into the waveguide;
A flat large reflecting plate with a size of about 2 wavelengths is installed parallel to the waveguide opening at a position approximately 0.25 wavelength behind the waveguide opening, and a large reflecting plate is provided on the outer periphery of the large reflecting plate. A side plate provided perpendicularly to the waveguide opening and the large reflecting plate, a flat small reflecting plate provided parallel to and opposite to the waveguide opening and the large reflecting plate, and the small reflecting plate and the dielectric body are integrated. A short backfire antenna, which is inserted into a waveguide opening and fixed with the metal screw, so that the height of the small reflector from the large reflector is 0.7 wavelength or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14108280A JPS5765009A (en) | 1980-10-08 | 1980-10-08 | Short backfire antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14108280A JPS5765009A (en) | 1980-10-08 | 1980-10-08 | Short backfire antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5765009A JPS5765009A (en) | 1982-04-20 |
| JPS6364923B2 true JPS6364923B2 (en) | 1988-12-14 |
Family
ID=15283782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14108280A Granted JPS5765009A (en) | 1980-10-08 | 1980-10-08 | Short backfire antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5765009A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646870A (en) * | 2012-01-15 | 2012-08-22 | 中国电子科技集团公司第十研究所 | Ultra-wide circularly polarized beam antenna with waveguide structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3045239A (en) * | 1949-12-14 | 1962-07-17 | Westinghouse Electric Corp | Parabolic feed system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS602646Y2 (en) * | 1977-09-24 | 1985-01-25 | 日本電信電話株式会社 | double reflector antenna |
-
1980
- 1980-10-08 JP JP14108280A patent/JPS5765009A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3045239A (en) * | 1949-12-14 | 1962-07-17 | Westinghouse Electric Corp | Parabolic feed system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5765009A (en) | 1982-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5757323A (en) | Antenna arrangements | |
| JP2648421B2 (en) | Antenna structure having continuous transverse stub element and method of manufacturing the same | |
| US7075492B1 (en) | High performance reflector antenna system and feed structure | |
| US4415900A (en) | Cavity/microstrip multi-mode antenna | |
| KR950013142B1 (en) | Annular slot antenna | |
| US6492950B2 (en) | Patch antenna with dielectric separated from patch plane to increase gain | |
| US3836977A (en) | Antenna system having a reflector with a substantially open construction | |
| US4282530A (en) | Cylindrical paraboloid weather cover for a horn reflector antenna with wave absorbing means | |
| KR100964623B1 (en) | Waveguide slot array antenna and planar slot array antenna | |
| JPH0936634A (en) | Feedome, primary radiator and antenna for microwave | |
| JP2000341030A (en) | Waveguide array antenna system | |
| JP3113331B2 (en) | Slot waveguide antenna | |
| US4297710A (en) | Parallel-plane antenna with rotation of polarization | |
| JPS6364923B2 (en) | ||
| JPH0366844B2 (en) | ||
| US4400701A (en) | Common antenna for primary and secondary radar | |
| US3212095A (en) | Low side lobe pillbox antenna employing open-ended baffles | |
| JPH09502587A (en) | Continuous transverse stub element device and manufacturing method thereof | |
| US4435714A (en) | Grating lobe eliminator | |
| Jones et al. | A wide-band transverse-slot flush-mounted array | |
| US3267477A (en) | Dual frequency microwave antenna | |
| GB2182806A (en) | Linearly polarized grid reflector antenna system with improved cross-polarization performance | |
| JPS62202605A (en) | Primary radiator for reflection mirror antenna | |
| US4516129A (en) | Waveguide with dielectric coated flange antenna feed | |
| GB2303491A (en) | Antenna arrangement |