JPH0514567Y2 - - Google Patents
Info
- Publication number
- JPH0514567Y2 JPH0514567Y2 JP13309987U JP13309987U JPH0514567Y2 JP H0514567 Y2 JPH0514567 Y2 JP H0514567Y2 JP 13309987 U JP13309987 U JP 13309987U JP 13309987 U JP13309987 U JP 13309987U JP H0514567 Y2 JPH0514567 Y2 JP H0514567Y2
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- wave absorber
- reflector
- antenna
- attached
- 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 - Lifetime
Links
- 239000006096 absorbing agent Substances 0.000 claims description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- 238000009434 installation Methods 0.000 description 3
- 229920006248 expandable polystyrene Polymers 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 241001272720 Medialuna californiensis Species 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
Landscapes
- Aerials With Secondary Devices (AREA)
Description
【考案の詳細な説明】
〔概要〕
電波吸収体付リフレクタアンテナに関し、電波
吸収体の取付け位置の変更が容易で、且つ位置変
更後もアンテナ性能が低下する恐れがない、電波
吸収体付リフレクタアンテナを提供することを目
的とし、
電波吸収体を内側平面に貼着する本体板部と、
本体板部の側縁に設けた脚板部とより取付板を構
成し、リフレクタアンテナの選択した開口エリア
を、電波吸収体で遮蔽すべく、リフレクタアンテ
ナの反射鏡の周辺部に、取付板の脚板部を着脱可
能に取付ける構成とする。[Detailed description of the invention] [Summary] Regarding the reflector antenna with a radio wave absorber, a reflector antenna with a radio wave absorber is provided, in which the installation position of the radio wave absorber can be easily changed and there is no risk of the antenna performance deteriorating even after the position is changed. The main body plate part has a radio wave absorber attached to the inner plane,
A mounting plate is formed by the leg plate provided on the side edge of the main body plate, and in order to shield the selected aperture area of the reflector antenna with a radio wave absorber, the leg plate of the mounting plate is attached to the periphery of the reflector of the reflector antenna. The structure is such that the parts are removably attached.
本考案は、リフレクタアンテナにかかわり、特
に電波吸収体付リフレクタアンテナに関する。
The present invention relates to a reflector antenna, and particularly to a reflector antenna with a radio wave absorber.
カセグレンアンテナ、パラボナアンテナ、オフ
セツトアンテナ、水平面内無指向性アンテナ等の
リフレクタアンテナは、周辺の構造物等よりの反
射波による妨害防止、近接アンテナ間相互のカツ
プリング防止等のために、選択した開口エリアに
電波吸収体を設けることがある。 Reflector antennas such as Cassegrain antennas, parabolic antennas, offset antennas, and non-directional antennas in the horizontal plane have a selected aperture to prevent interference due to reflected waves from surrounding structures, etc., and to prevent mutual coupling between adjacent antennas. Radio wave absorbers may be installed in the area.
近年は多種の電波吸収体が開発されているが、
その中で、カーボンゴム、カーボン含有発泡ウレ
タン系樹脂、黒鉛含有発泡ポリスチロール系樹脂
等の誘電吸収体、或いはフエライト粉末とゴム等
とを練り混ぜた磁性吸収体が、可撓性があり、且
つシート状に加工するのが容易であるので、リフ
レクタアンテナの電波雑音防止の電波吸収体とし
て広く使用されている。 In recent years, various types of radio wave absorbers have been developed,
Among these, dielectric absorbers such as carbon rubber, carbon-containing foamed urethane resin, graphite-containing foamed polystyrene resin, etc., or magnetic absorbers made by mixing ferrite powder with rubber, etc. are flexible and Since it is easy to process into a sheet shape, it is widely used as a radio wave absorber to prevent radio noise in reflector antennas.
水平面内無指向性アンテナに電波吸収体を設け
た従来例を第４図に示す。
FIG. 4 shows a conventional example in which a radio wave absorber is provided in a non-directional antenna in a horizontal plane.
第４図において、１は例えば小開口円錐ホーン
であつて、金属材（例えばアルミニウム等）より
なる上方が拡開した有底円筒形のアンテナ筐体４
の、軸心部に装着されている。 In FIG. 4, reference numeral 1 denotes, for example, a small-opening conical horn, and a bottomed cylindrical antenna housing 4 made of a metal material (such as aluminum) and widened at the top.
It is attached to the center of the shaft.
アンテナ筐体４の下端面に筐体フランジ４Ａを
設け、筐体フランジ４Ａ部分を無線装置筐体に固
着して、水平面内無指向性アンテナを、無線装置
に装着するよう構成してある。 A housing flange 4A is provided on the lower end surface of the antenna housing 4, and the housing flange 4A portion is fixed to the wireless device housing, so that the horizontal omnidirectional antenna is attached to the wireless device.
なお、ホーン１は導波管を介して無線装置（図
示せず）に接続されている。 Note that the horn 1 is connected to a wireless device (not shown) via a waveguide.
アンテナ筐体４の開口側の端面には、合成樹脂
（例えばポリカーボネイト）を円筒形に成形した
反射鏡支持筒３を、装着してある。 A reflector support tube 3 made of synthetic resin (for example, polycarbonate) and molded into a cylindrical shape is attached to the end surface of the antenna housing 4 on the opening side.
２は、軸心部に突出した頂点を有する回転放物
面形の、例えばアルミニウム材等よりなる反射鏡
であつて、頂点がホーン１の軸心上にあり、焦点
がホーン１内に一致するように、反射面が斜め下
方に傾斜して反射鏡支持筒３内に収容され、外周
の裾部を反射鏡支持筒３の上部端面に、ねじ止め
固定されている。 Reference numeral 2 denotes a reflecting mirror made of, for example, aluminum and having a parabolic shape with a protruding apex at the axial center. As such, the reflecting surface is housed in the reflecting mirror support cylinder 3 with a downward inclination, and the outer circumferential hem is fixed to the upper end surface of the reflecting mirror supporting cylinder 3 with screws.
なお、反射鏡２の上面部に、円板状の蓋５を取
付け、反射面の裏面の凹部に塵埃、雨滴等が溜ま
らないようにしてある。 A disk-shaped lid 5 is attached to the upper surface of the reflecting mirror 2 to prevent dust, raindrops, etc. from accumulating in the recessed portion on the back surface of the reflecting mirror 2.
水平面内無指向性アンテナは上述のように構成
されているので、ホーン１より出射された電波
は、反射鏡２にあたり、反射鏡２で反射して、全
方位に一様に伝搬する。 Since the horizontal omnidirectional antenna is configured as described above, the radio waves emitted from the horn 1 hit the reflecting mirror 2, are reflected by the reflecting mirror 2, and propagate uniformly in all directions.
また、任意の外周方向より到来した電波は、反
射鏡２で反射してホーン１に集束し、無線装置に
伝送される。 Further, radio waves arriving from any direction of the outer circumference are reflected by the reflecting mirror 2, focused on the horn 1, and transmitted to the wireless device.
そして、周辺の構造物等よりの反射波による妨
害防止（第３図では右側方向ある構造物）、近接
アンテナ間相互のカツプリング防止（第３図では
右側方向にあるリフレクタアンテナ）等のため
に、反射鏡支持筒３の外周面のほぼ1/3円周面
（第３図では右側のほぼ1/3円周面）に、電波吸収
体８を接着剤を用いて貼着してある。 In order to prevent interference due to reflected waves from surrounding structures (structures on the right side in Figure 3), and to prevent mutual coupling between nearby antennas (reflector antennas on the right side in Figure 3), etc. A radio wave absorber 8 is adhered to approximately 1/3 circumferential surface (approximately 1/3 circumferential surface on the right side in FIG. 3) of the outer circumferential surface of the reflecting mirror support cylinder 3 using an adhesive.
したがつて、ホーン１より出射し、反射鏡２で
反射した電波の内、電波吸収体８を貼着した開口
エリア方向に反射した電波は、電波吸収体８で吸
収されるので、電波吸収体８の外側に放出されな
い。 Therefore, among the radio waves emitted from the horn 1 and reflected by the reflector 2, the radio waves reflected in the direction of the opening area to which the radio wave absorber 8 is attached are absorbed by the radio wave absorber 8. It is not released outside of 8.
また、電波吸収体８方向より到来した電波は、
電波吸収体８で吸収されるので、反射鏡２に到来
することがない。 In addition, radio waves arriving from eight directions of the radio wave absorber are
Since it is absorbed by the radio wave absorber 8, it does not reach the reflecting mirror 2.
なお、水平面内無指向性アンテナでなく、例え
ばカセグレンアンテナ等の場合には、反射鏡面に
直接電波吸収体を貼着していた。 Note that in the case of a Cassegrain antenna instead of a horizontal omnidirectional antenna, for example, a radio wave absorber is attached directly to the reflecting mirror surface.
開口の選択したエリアに電波吸収体を設けた電
波吸収体付リフレクタアンテナは、設置位置の変
更、或いは周囲環境の変動等により、電波吸収体
の取付位置を変更する必要がある。
In a reflector antenna with a radio wave absorber provided with a radio wave absorber in a selected area of the opening, it is necessary to change the mounting position of the radio wave absorber due to changes in the installation position or changes in the surrounding environment.
しかしながら従来のように、アンテナの開口エ
リア部分に電波吸収体を直接貼着しものは、電波
吸収体を剥離して、新規の電波吸収体８を、所望
の別個所の開口エリアに貼着しなければならず、
交換作業が煩わしいという問題点があつた。 However, as in the past, where a radio wave absorber is directly attached to the aperture area of the antenna, the radio wave absorber is peeled off and a new radio wave absorber 8 is attached to a desired separate aperture area. must,
There was a problem that the replacement work was troublesome.
また、電波吸収体を剥離した跡の反射鏡支持筒
の表面部分、或いは反射鏡面部分に付着した電波
吸収体の屑を、完全に除去しなければ、アンテナ
性能が低下するという問題点があつた。 In addition, there was a problem that unless the radio wave absorber debris adhering to the surface of the reflector support tube where the radio wave absorber was peeled off or the reflective mirror surface was completely removed, the antenna performance would deteriorate. .
本考案はこのような点に鑑みて創作されたもの
で、電波吸収体の取付け位置の変更が容易で、且
つ位置変更後もアンテナ性能が低下する恐れがな
い、電波吸収体付リフレクタアンテナを提供する
ことを目的としている。 The present invention was created in view of these points, and provides a reflector antenna with a radio wave absorber that allows the installation position of the radio wave absorber to be easily changed and that does not cause the antenna performance to deteriorate even after the position is changed. It is intended to.
上記の問題点を解決するために本考案は、第１
図に例示したように、リフレクタアンテナの選択
した開口エリアを電波吸収体２０で遮蔽するため
に、電波吸収体２０を装着する取付板２１を、内
側面に電波吸収体２０を貼着する本体板部２１Ａ
と、本体板部２１Ａの側縁に設けた脚板部２１Ｂ
とよりなる構成とする。
In order to solve the above problems, the present invention
As illustrated in the figure, in order to shield the selected aperture area of the reflector antenna with the radio wave absorber 20, a mounting plate 21 to which the radio wave absorber 20 is attached is attached to a main body plate to which the radio wave absorber 20 is attached to the inner surface. Section 21A
and a leg plate portion 21B provided on the side edge of the main body plate portion 21A.
The structure is as follows.
そして、本体板部２１Ａがリフレクタアンテナ
の開口部の所望の開口エリアを遮蔽するように、
取付板２１をリフレクタアンテナに合わせ、脚板
部２１Ｂをリフレクタアンテナの反射鏡２の周辺
部に、着脱可能の手段、例えばねじ止め手段によ
り固着するようにする。 Then, so that the main body plate portion 21A shields a desired opening area of the opening of the reflector antenna,
The mounting plate 21 is aligned with the reflector antenna, and the leg plate part 21B is fixed to the peripheral part of the reflector 2 of the reflector antenna by removable means, for example, screwing means.
上記本考案の手段によれば、電波吸収体２０を
本体板部２１Ａに貼着してあるので、脚板部２１
Ｂをリフレクタアンテナに固定しているねじを緩
めて取付板２１をリフレクタアンテナより取り外
し、脚板部２１Ｂを反射鏡２の周辺部の所望の位
置にずらした後、再びねじを締めて取付板２１の
取付け位置を変更すれば、電波吸収体２０の取付
け位置を容易に変更することができる。
According to the above-mentioned means of the present invention, the radio wave absorber 20 is attached to the main body plate portion 21A, so that the leg plate portion 21
The mounting position of the radio wave absorber 20 can be easily changed by loosening the screws fixing the base plate 21B to the reflector antenna, removing the mounting plate 21 from the reflector antenna, shifting the leg plate portion 21B to a desired position on the periphery of the reflector 2, and then tightening the screws again to change the mounting position of the mounting plate 21.
また、電波吸収体２０は本体板部２１Ａに貼着
してあるので、電波吸収体２０を移動した部分に
対応する反射鏡支持筒３の表面、或いは反射鏡面
を清掃する必要がない。 Further, since the radio wave absorber 20 is attached to the main body plate portion 21A, there is no need to clean the surface of the mirror support tube 3 or the reflective mirror surface corresponding to the portion where the radio wave absorber 20 has been moved.
以下図を参照しながら、本考案を具体的に説明
する。なお、全図を通じて同一符号は同一対象物
を示す。
The present invention will be specifically explained below with reference to the drawings. Note that the same reference numerals indicate the same objects throughout the figures.
第１図は本考案の一実施例の図で、ａは断面
図、ｂは平面図を示し、第２図、第３図はそれぞ
れ本考案の他の実施例の図で、それぞれのａは側
面図、ｂは平面図、ｃは要部断面図を示す。 Fig. 1 is a diagram of one embodiment of the present invention, where a is a sectional view and b is a plan view, and Figs. 2 and 3 are diagrams of other embodiments of the present invention. A side view, b is a plan view, and c is a sectional view of a main part.
第１図に示す水平面内無指向性アンテナは、上
方が拡開した有底円筒形のアンテナ筐体４の、軸
心部にホーン１を装着し、アンテナ筐体４の開口
側の端面に、合成樹脂よりなる円筒形の反射鏡支
持筒３を装着してある。 The horizontal plane omnidirectional antenna shown in FIG. A cylindrical reflecting mirror support tube 3 made of synthetic resin is attached.
反射鏡２は、頂点がホーン１の軸心上にあり、
焦点がホーン１内に一致するように、反射面が斜
め下方に傾斜した状態で、反射鏡支持筒３内に収
容され、外周の裾部を反射鏡支持筒３の上部端面
に、ねじ止め固定されている。 The reflector 2 has its apex on the axis of the horn 1,
The reflective surface is housed in the reflector support tube 3 with the reflective surface tilted diagonally downward so that the focal point is aligned with the inside of the horn 1, and the outer circumferential hem is fixed to the upper end surface of the reflector support tube 3 with screws. has been done.
また、反射鏡２の上端面部には、円板状の蓋５
を固着してある。 Further, a disk-shaped lid 5 is provided on the upper end surface of the reflecting mirror 2.
is fixed.
蓋５の外周近傍には、同心円上に等ピツチで、
スタツトボルト２３を（第１図では四本）を設け
てある
２１は矩形状の合成樹脂板（例えば塩化ビニー
ル板）、又は金属板（例えばアルミニウム板）等
よりなり、互いに直交する本体板部２１Ａと脚板
部２１Ｂとを設けた取付板である。 Near the outer periphery of the lid 5, at equal pitches on concentric circles,
Stud bolts 23 (four in Fig. 1) are provided. Reference numeral 21 is made of a rectangular synthetic resin plate (for example, a vinyl chloride plate) or a metal plate (for example, an aluminum plate). This is a mounting plate provided with a leg plate portion 21B.
本体板部２１Ａは、長辺が反射鏡支持筒３の直
径よりも少し大きく、高さが反射鏡支持筒３の高
さにほぼ等しい矩形板状である。 The main body plate portion 21A is a rectangular plate whose long sides are slightly larger than the diameter of the mirror support tube 3 and whose height is approximately equal to the height of the reflector support tube 3.
蓋５に設けたスタツトボルト２３に対応して、
脚板部２１Ｂには、スタツトボルト２３が嵌挿す
るねじ用孔を配設してある。 Corresponding to the stud bolt 23 provided on the lid 5,
The leg plate portion 21B is provided with a screw hole into which the stud bolt 23 is inserted.
電波吸収体２０の素材は、カーボンゴム、カー
ボン含有発泡ウレタン系樹脂、黒鉛含有発泡ポリ
スチロール系樹脂等の誘電吸収体、或いはフエラ
イト粉末とゴム等を練り混ぜた磁性吸収体であ
る。 The material of the radio wave absorber 20 is a dielectric absorber such as carbon rubber, carbon-containing foamed urethane resin, graphite-containing foamed polystyrene resin, or a magnetic absorber made by mixing ferrite powder and rubber.
電波吸収体２０は、本体板部２１Ａと同形状の
シート状で、本体板部２１Ａの内側面に接着剤で
貼着してある。 The radio wave absorber 20 is in the form of a sheet having the same shape as the main body plate portion 21A, and is adhered to the inner surface of the main body plate portion 21A with an adhesive.
周辺の構造物等よりの反射波による妨害防止
（第１図では右側方向ある構造物）、近接アンテナ
間相互のカツプリング防止（第１図では右側方向
にあるリフレクタアンテナ）等のために、上述の
取付板２１を水平面内無指向性アンテナに取付け
てある。 The above-mentioned A mounting plate 21 is attached to the omnidirectional antenna in the horizontal plane.
取付板２１の脚板部２１Ｂが蓋５に密接した状
態で、電波吸収体２０（即ち本体板部２１Ａ）が
反射鏡支持筒３の外周面の所望の方向に対応する
ように、取付板２１の取付け位置を調整し、その
状態でスタツトボルト２３の先端を脚板部２１Ｂ
のねじ用孔に嵌挿し、外側からナツト２４をスタ
ツトボルト２３に螺着して、取付板２１を水平面
内無指向性アンテナに固定してある。 With the leg plate part 21B of the mounting plate 21 in close contact with the lid 5, the mounting plate 21 is moved so that the radio wave absorber 20 (that is, the main body plate part 21A) corresponds to the desired direction of the outer peripheral surface of the reflector support tube 3. Adjust the mounting position, and in that state, insert the tip of the stud bolt 23 into the leg plate part 21B.
The mounting plate 21 is fixed to the non-directional antenna in the horizontal plane by fitting into the screw hole and screwing the nut 24 onto the stud bolt 23 from the outside.
したがつて、ホーン１より出射し、反射鏡２で
放射状に反射した電波の内、電波吸収体２０を設
けた開口エリア方向に反射した電波は、電波吸収
体２０に吸収されるので、本体板部２１Ａの外側
には放出されない。よつて、電波吸収体２０方向
にある他の構造物で自身が発した電波が反射して
戻る恐れがない。 Therefore, among the radio waves emitted from the horn 1 and radially reflected by the reflector 2, the radio waves reflected in the direction of the opening area where the radio wave absorber 20 is provided are absorbed by the radio wave absorber 20, so that the main body plate It is not released outside the portion 21A. Therefore, there is no fear that the radio waves emitted by the radio wave absorber will be reflected back by other structures located in the direction of the radio wave absorber 20.
また、電波吸収体２０を設けた方向に設置して
ある他のリフレクタアンテナ等と、電気的カツプ
リングを生ずる恐れがない。 Further, there is no fear of electrical coupling with other reflector antennas or the like installed in the direction in which the radio wave absorber 20 is provided.
電波吸収体２０を設ける位置を変更するには、
ナツト２４を緩めて取付板２１を一旦取り外し、
所望の位置にあるスタツトボルト２３を選択し
て、脚板部２１Ｂのねじ用孔を合わせ、ナツト２
４を螺着して取付板２１を固定する。 To change the position where the radio wave absorber 20 is installed,
Loosen the nuts 24 and remove the mounting plate 21,
Select the stud bolt 23 in the desired position, align the screw holes in the leg plate 21B, and tighten the nut 2.
4 to fix the mounting plate 21.
第２図はカセグレンアンテナに適用した例であ
つて、回転放物面よりなる主反射鏡１２はアンテ
ナマウント１４に支持されている。 FIG. 2 shows an example of application to a Cassegrain antenna, in which a main reflecting mirror 12 formed of a paraboloid of rotation is supported by an antenna mount 14.
主反射鏡１２の焦点位置には、支持柱１３で支
持した副反射鏡１５を設置し、主反射鏡１２の原
点位置には副反射鏡１５に対向して一次放射器１
１を設けてある。 A sub-reflector 15 supported by a support column 13 is installed at the focal point of the main reflector 12, and a primary radiator 1 is placed opposite the sub-reflector 15 at the origin position of the main reflector 12.
1 is provided.
なお、主反射鏡１２の外周縁は、強度を強くす
るために、外側にカールさせてある。 Note that the outer peripheral edge of the main reflecting mirror 12 is curled outward to increase its strength.
２５は、合成樹脂、又は金属板よりなり、半月
状の本体板部２５Ａと、本体板部２５Ａの弧側の
縁の数個所をほぼ直角に折り曲げた脚板部２５Ｂ
とを有する取付板である。そして、本体板部２５
Ａの弧の半径は、主反射鏡１２の半径にほぼ等し
い。 Reference numeral 25 is made of synthetic resin or metal plate, and includes a half-moon-shaped main body plate part 25A and a leg plate part 25B in which several parts of the arc side edge of the main body plate part 25A are bent at approximately right angles.
It is a mounting plate having. And the main body plate part 25
The radius of the arc of A is approximately equal to the radius of the main reflecting mirror 12.
脚板部２５Ｂには、ボルト２７が嵌挿するねじ
用孔を設け、このねじ用孔に対向した脚板部２５
Ｂの内側に、主反射鏡１２の外周縁の裏側のカー
ル部に楔状に係着する固着駒２６を設け、脚板部
２５Ｂに対向する固着駒２６の面に、ボルト２７
が螺着するねじ孔を設けてある。 The leg plate portion 25B is provided with a screw hole into which the bolt 27 is inserted, and the leg plate portion 25B is provided with a screw hole into which the bolt 27 is inserted.
A fixing piece 26 is provided on the inside of the main reflecting mirror 12, and the fixing piece 26 is attached in a wedge shape to the curled part on the back side of the outer peripheral edge of the main reflecting mirror 12.
A screw hole is provided for the screw to be screwed into.
ボルト２７を締めつけると、固着駒２６が脚板
部２５Ｂ方向に引き寄せられて、固着駒２６が主
反射鏡１２の外周縁のカール部に係着するので、
取付板２５を主反射鏡１２に取付けることができ
る。 When the bolt 27 is tightened, the fixing piece 26 is drawn toward the leg plate portion 25B, and the fixing piece 26 is engaged with the curled portion of the outer periphery of the main reflecting mirror 12.
A mounting plate 25 can be attached to the main reflector 12.
電波吸収体２０は、本体板部２５Ａと同形状の
半月状で、本体板部２５Ａの内側面に接着剤で貼
着してある。 The radio wave absorber 20 has a half-moon shape having the same shape as the main body plate portion 25A, and is adhered to the inner surface of the main body plate portion 25A with an adhesive.
電波の到来防止、放出防止をしようとする主反
射鏡１２の開口エリアを本体板部２５Ａが覆うよ
うに、取付板２５を主反射鏡１２の外周縁に位置
合わし、脚板部２５Ｂに螺合しているボルト２７
を締めつけ、取付板２５を主反射鏡１２の所望の
個所に固定してある。 The mounting plate 25 is aligned with the outer periphery of the main reflector 12 and screwed onto the leg plate 25B so that the main body plate 25A covers the opening area of the main reflector 12 that is intended to prevent the arrival and emission of radio waves. bolt 27
, and the mounting plate 25 is fixed to a desired location on the main reflecting mirror 12.
なお、ボルト２７を緩め、取付板２５を主反射
鏡１２の外周縁に沿つて摺動移動させ、所望の位
置でボルト２７を締めつけるだけで、電波吸収体
２０の取付け位置を容易に変更することができ
る。 The mounting position of the radio wave absorber 20 can be easily changed by simply loosening the bolts 27, sliding the mounting plate 25 along the outer periphery of the main reflecting mirror 12, and tightening the bolts 27 at the desired position. I can do it.
第３図はカセグレンアンテナに第２図とは異な
る角度で、電波吸収体２０は取付けたものであ
る。 FIG. 3 shows the radio wave absorber 20 attached to the Cassegrain antenna at a different angle from that in FIG. 2.
即ち、電波吸収体２０を貼着した本体板部２５
Ａを、電波の到来防止、放出防止をしようとする
主反射鏡１２の外周縁に沿つて半円筒状になるよ
うに、装着してある。第２図、第３図のいずれの
構造でも、不要電波を吸収することは勿論であ
る。 That is, the main body plate portion 25 to which the radio wave absorber 20 is attached
A is attached so as to form a semi-cylindrical shape along the outer periphery of the main reflecting mirror 12 which is intended to prevent the arrival and emission of radio waves. Needless to say, both the structures shown in FIG. 2 and FIG. 3 absorb unnecessary radio waves.
以上説明したように本考案は、電波吸収体を取
付板に貼着し、その取付板をリフレクタアンテナ
に取付けるよう構成したもので、電波吸収体の取
付け位置の変更が容易で、且つ位置変更後もアン
テナ性能が低下する恐れがない等、実用上で優れ
た効果がある。
As explained above, the present invention has a structure in which a radio wave absorber is attached to a mounting plate and the mounting plate is attached to a reflector antenna.The mounting position of the radio wave absorber can be easily changed, and the mounting position of the radio wave absorber can be easily changed. It also has excellent practical effects, such as there being no risk of deterioration in antenna performance.
第１図は本考案の実施例の図で、ａは断面図、
ｂは平面図、第２図は本考案の他の実施例の図
で、ａは側面図、ｂは平面図、ｃは要部断面図、
第３図は本考案のさらに他の実施例の図で、ａは
側面図、ｂは平面図、ｃは要部断面図、第４図は
従来例の断面図である。
図において、１はホーン、２は反射鏡、３は反
射鏡支持筒、５は蓋、８，２０は電波吸収体、１
１は一次放射器、１２は主反射鏡、２１，２５は
取付板、２１Ａ，２５Ａは本体板部、２１Ｂ，２
５Ｂは脚板部を示す。
FIG. 1 is a diagram of an embodiment of the present invention, a is a cross-sectional view,
b is a plan view, FIG. 2 is a diagram of another embodiment of the present invention, a is a side view, b is a plan view, c is a sectional view of the main part,
FIG. 3 shows still another embodiment of the present invention, in which a is a side view, b is a plan view, c is a sectional view of a main part, and FIG. 4 is a sectional view of a conventional example. In the figure, 1 is a horn, 2 is a reflector, 3 is a reflector support tube, 5 is a lid, 8 and 20 are radio wave absorbers, 1
1 is a primary radiator, 12 is a main reflector, 21 and 25 are mounting plates, 21A and 25A are main body plates, 21B and 2
5B indicates a leg plate portion.
Claims (1)
と、該本体板部の側縁に設けた脚板部とより取付
板２１を構成し、 リフレクタアンテナの選択した開口エリアを、
該電波吸収体２０で遮蔽すべく、該リフレクタア
ンテナの反射鏡の周辺部に、該取付板２１の脚板
部を着脱可能に取付けたことを特徴とする電波吸
収体付リフレクタアンテナ。[Claims for Utility Model Registration] A mounting plate 21 is constituted by a main body plate portion on which the radio wave absorber 20 is attached to the inner plane, and a leg plate portion provided on the side edge of the main body plate portion, the opening area,
A reflector antenna with a radio wave absorber, characterized in that a leg plate part of the mounting plate 21 is detachably attached to the periphery of the reflector of the reflector antenna in order to be shielded by the radio wave absorber 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13309987U JPH0514567Y2 (en) | 1987-08-31 | 1987-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13309987U JPH0514567Y2 (en) | 1987-08-31 | 1987-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6438811U JPS6438811U (en) | 1989-03-08 |
| JPH0514567Y2 true JPH0514567Y2 (en) | 1993-04-19 |
Family
ID=31390662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13309987U Expired - Lifetime JPH0514567Y2 (en) | 1987-08-31 | 1987-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0514567Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006004175A (en) * | 2004-06-17 | 2006-01-05 | Toshiba Corp | Self-position identification device and self-position identification method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011015203A (en) * | 2009-07-02 | 2011-01-20 | National Institute Of Information & Communication Technology | Curved surface reflector antenna and position measuring system using the same |
| JP5722112B2 (en) * | 2011-04-22 | 2015-05-20 | 日本無線株式会社 | Double-reflector antenna feeder |
-
1987
- 1987-08-31 JP JP13309987U patent/JPH0514567Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006004175A (en) * | 2004-06-17 | 2006-01-05 | Toshiba Corp | Self-position identification device and self-position identification method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6438811U (en) | 1989-03-08 |
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