JPH04114211U - parabolic antenna - Google Patents
parabolic antennaInfo
- Publication number
- JPH04114211U JPH04114211U JP2533691U JP2533691U JPH04114211U JP H04114211 U JPH04114211 U JP H04114211U JP 2533691 U JP2533691 U JP 2533691U JP 2533691 U JP2533691 U JP 2533691U JP H04114211 U JPH04114211 U JP H04114211U
- Authority
- JP
- Japan
- Prior art keywords
- parabolic
- radio wave
- wave absorber
- parabolic antenna
- parabolic reflector
- 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
- 239000006096 absorbing agent Substances 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910001035 Soft ferrite Inorganic materials 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims description 3
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical group [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 3
- 229910021384 soft carbon Inorganic materials 0.000 claims description 3
- 230000002411 adverse Effects 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 240000007839 Kleinhovia hospita Species 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Compounds Of Iron (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
(57)【要約】 （修正有）
【目的】放物面反射器の外周縁における不要反射波の発
生を抑止することにより、当該パラボラアンテナに接続
された受像機へのノイズの混入を防止し、且つ隣接設置
された他家のパラボラアンテナにも悪影響を及ぼすこと
のないパラボラアンテナを提供せんとする。
【構成】放物面反射器１と該放物面反射器１の焦点に配
置された受電部２とよりなるパラボラアンテナにおい
て、放物面反射器１の外周縁内側に全周にわたって衛星
放送の周波数帯域に対して電波吸収能を有する電波吸収
体８を取付けた構成とした。
(57) [Summary] (with amendments) [Purpose] By suppressing the generation of unnecessary reflected waves at the outer periphery of a parabolic reflector, it is possible to prevent noise from entering the receiver connected to the parabolic antenna. To provide a parabolic antenna that does not adversely affect parabolic antennas of other houses installed adjacently. [Structure] In a parabolic antenna consisting of a parabolic reflector 1 and a power receiving section 2 placed at the focal point of the parabolic reflector 1, satellite broadcasting is transmitted all around the inside of the outer periphery of the parabolic reflector 1. The structure is such that a radio wave absorber 8 having radio wave absorbing ability for a frequency band is attached.
Description
【０００１】0001
本考案は、衛星放送を受信する為に用いられるパラボラアンテナの改良に関し 、更に詳しくは、パラボラアンテナ外周縁における受信電波の乱反射をなくすこ とによりノイズの混入を防止したパラボラアンテナに関する。 This invention relates to the improvement of parabolic antennas used to receive satellite broadcasting. , More specifically, how to eliminate the diffuse reflection of received radio waves at the outer periphery of a parabolic antenna. This invention relates to a parabolic antenna that prevents noise from entering.
【０００２】0002
衛星放送の普及に伴って、衛星放送受信用アンテナを設置する家庭が急増して いる。現在、衛星放送は11GHz 〜13GHz の周波数帯域を中心に放送されており、 各家庭ではこの電波を受信する為にパラボラアンテナを設置している。パラボラ アンテナは図９に示す如く、放物面等の曲面を有するおわん型の反射器１（以下 、放物面反射器１と称す）と該放物面反射器１の焦点位置に配置された受電部２ とから構成されている。又、放物面反射器１から見て受電部２の背後にはコンバ ータ（周波数変換器）３が配置され、前記受電部２によって受信された衛星放送 の原信号をコンバータ３によって周波数変換した後、同軸ケーブル４を経由させ て室内の衛星放送用チュナーやテレビ受像器に信号を送給している。コンバータ ３は衛星放送の原信号をそのまま室内まで送給した場合、減衰が著しいことから 周波数を下げる目的で介在させられるもので、一般的には１GHz 程度まで周波数 を下げている。 With the spread of satellite broadcasting, the number of households installing satellite reception antennas has increased rapidly. There is. Currently, satellite broadcasting is mainly broadcast in the frequency band of 11GHz to 13GHz. Each home has a parabolic antenna installed to receive these radio waves. parabola As shown in FIG. 9, the antenna is a bowl-shaped reflector 1 (hereinafter referred to as , referred to as a parabolic reflector 1) and a power receiving unit 2 disposed at the focal point of the parabolic reflector 1. It is composed of. Also, there is a converter behind the power receiving unit 2 when viewed from the parabolic reflector 1. satellite broadcasting data received by the power receiving unit 2. After converting the frequency of the original signal by converter 3, it is sent via coaxial cable 4. It sends signals to indoor satellite broadcast tuners and television receivers. converter 3 is because the attenuation is significant when the original satellite broadcast signal is sent indoors as is. It is used for the purpose of lowering the frequency, and generally the frequency is lowered to about 1 GHz. is lowering.
【０００３】 パラボラアンテナは、図10に示すように入射する平面波を放物面反射器１の放 物面５で反射させて球面波に変え、これを焦点に収束させるとともに焦点位置に 配置された受電部２で受信するものであるが、図11に示す如く放物面反射器１の 外周縁からは正規の周波数以外の反射波や位相の異なる乱れた反射波が発生し、 これがゴースト等のノイズ原因となることが知られている。これは、外周縁エッ ジ部６における電波の反射が複雑である為に、該部分からの反射波が放物面５に 再入射したりする予測不可能な現象に起因していると推測される。従来のパラボ ラアンテナではこのようなノイズ混入を避ける為に、図12に示すように、外周縁 に放物面反射器本体の径方向外方に向かって曲げた延設部７を形成している。0003 The parabolic antenna directs the incident plane wave to the radiation of the parabolic reflector 1, as shown in Figure 10. It is reflected by the object surface 5 and turned into a spherical wave, which is then converged to the focal point and moved to the focal position. The power is received by the installed power receiving section 2, and as shown in FIG. 11, the parabolic reflector 1 Reflected waves with frequencies other than the normal frequency and disturbed reflected waves with different phases are generated from the outer periphery. This is known to cause noise such as ghosts. This is the outer edge. Since the reflection of the radio waves at the area 6 is complicated, the reflected waves from this area are reflected on the paraboloid 5. It is assumed that this is due to unpredictable phenomena such as re-incidence. conventional parab In order to avoid such noise contamination, the outer periphery of the antenna is as shown in Figure 12. An extending portion 7 is formed which is bent toward the outside in the radial direction of the parabolic reflector main body.
【０００４】0004
しかしながら、このような外周縁を曲げる方法では加工が面倒であるうえに、 延設部７で反射した電波は当該パラボラアンテナへの再入射は防止できるものの 、反射波が隣接する他家のパラボラアンテナに入射するおそれがあり、他家の受 像機の映像を乱すおそれがあった。そして、このことは住宅密集地域や集合住宅 の場合、特に深刻な問題となっていた。本考案はかかる現況に鑑みてなされたも のであり、当該パラボラアンテナに接続された受像機へのノイズ混入を防止でき るとともに、他家のパラボラアンテナにも悪影響を及ぼすことのないパラボラア ンテナを提供せんとするものである。 However, this method of bending the outer periphery is cumbersome to process, and Although it is possible to prevent the radio waves reflected from the extension part 7 from entering the parabolic antenna again, , there is a risk that the reflected waves will enter the parabolic antenna of another neighboring house, There was a risk of disturbing the images from the imager. This also applies to densely populated areas and apartment complexes. This was a particularly serious problem. This idea was made in view of the current situation. This prevents noise from entering the receiver connected to the parabolic antenna. In addition, it is a parabolic antenna that does not have a negative impact on other people's parabolic antennas. The aim is to provide antennas.
【０００５】[0005]
かかる課題を解決した本考案は、放物面反射器と該放物面反射器の焦点に配置 された受電部とよりなるパラボラアンテナにおいて、放物面反射器の外周縁内側 に全周にわたって衛星放送の周波数帯域に対して電波吸収能を有する電波吸収体 を取付けたことを特徴としている。電波吸収体としては、ソフトフェライト及び ／又はカーボンを合成樹脂に分散配合したものが用いられ、ソフトフェライトと しては、マンガンジンクフェライト又はニッケルジンクフェライトを用いること が好ましい。又、電波吸収体には嵌合用凹部若しくは凸部を形成して、凹凸嵌合 により放物面反射器の外周縁に取りつけることが好ましい。 The present invention solves this problem by using a parabolic reflector and a focal point of the parabolic reflector. In a parabolic antenna consisting of a power receiving part that is A radio wave absorber that has the ability to absorb radio waves in the frequency band of satellite broadcasting over the entire circumference. It is characterized by having a . As radio wave absorbers, soft ferrite and /Or a mixture of carbon dispersed in synthetic resin is used, and soft ferrite and carbon are used. If so, use manganese zinc ferrite or nickel zinc ferrite. is preferred. In addition, the radio wave absorber is formed with a recess or a convex part for fitting, so that the concave-convex fitting is achieved. It is preferable to attach it to the outer periphery of the parabolic reflector.
【０００６】[0006]
このような構成のパラボラアンテナにおいては、放物面反射器の放物面で反射 した電波は焦点位置に配置された受電部に収束し、他方、放物面反射器外周縁に 入射した電波は該部分に取りつけられた電波吸収体内に進入した後、該電波吸収 体内部で熱に変換されて減衰する。したがって、放物面反射器外周縁からの不要 反射波の発生は極めて少ないものとなり、当該パラボラアンテナに接続された受 像機へのノイズ混入を避けることができると同時に、隣接設置された他家のパラ ボラアンテナへの不要反射波による影響もなくすことができる。 In a parabolic antenna with this type of configuration, the reflection from the parabolic surface of the parabolic reflector The generated radio waves converge on the power receiving part placed at the focal point, and on the other hand, they are transmitted to the outer periphery of the parabolic reflector. After the incident radio wave enters the radio wave absorber attached to the part, it absorbs the radio wave. It is converted into heat and attenuated inside the body. Therefore, unnecessary light from the outer edge of the parabolic reflector The generation of reflected waves is extremely small, and the reception connected to the parabolic antenna It is possible to avoid noise intrusion into the imager, and at the same time, it is possible to avoid noise from other houses installed next to it. The influence of unnecessary reflected waves on the bora antenna can also be eliminated.
【０００７】 電波吸収体の中にカーボンを配合させたときには、カーボンは紫外線を吸収し て熱に変換する能力に優れていることから、樹脂の紫外線による劣化が抑止され 電波吸収体としての耐光性が向上する。又、電波吸収体を凹凸嵌合により放物面 反射器の外周縁に取りつけるようにすれば、取付けが容易であるうえに風雨に晒 されても電波吸収体が脱落することはない。[0007] When carbon is blended into a radio wave absorber, carbon absorbs ultraviolet rays. Because it has an excellent ability to convert heat into heat, deterioration of the resin due to ultraviolet rays is suppressed. Improves light resistance as a radio wave absorber. In addition, the radio wave absorber can be made into a paraboloid by fitting the concave and convex parts. By attaching it to the outer edge of the reflector, it is easy to install and prevents exposure to wind and rain. The radio wave absorber will not fall off even if
【０００８】[0008]
次ぎに本考案の詳細を図示した実施例に基づき説明する。図１は本考案のパラ ボラアンテナの１実施例を示す断面説明図である。パラボラアンテナはおわん型 の放物面反射器１と該放物面反射器１の焦点位置に配置された受電部２とから構 成されている。そして放物面反射器１から見た受電部２の背後にはコンバータ３ が配置され、受電部２で受信された11GHz 〜13GHz の衛星放送の原信号を１GHz の信号に変換したうえ、同軸ケーブル（図示せず）を経由させて室内の衛星放送 用チュナーやテレビ受像器に供給している。本考案は放物面反射器１の外周縁内 側に図２の正面図に示す如く全周にわたって電波吸収体８を取りつけたことを特 徴としている。電波吸収体８としてはソフトフェライト及び／又はカーボンをポ リプロピレンや塩化ビニル等の合成樹脂に分散配合したものが用いられ、ソフト フェライトとしてはマンガンジンクフェライトやニッケルジンクフェライトを用 いることができる。カーボンは紫外線を吸収して熱に変換する能力に優れること から、カーボンを含ませることによって紫外線による合成樹脂の劣化を抑止する ことができる。又、電波吸収体は衛星放送の周波数帯域である11GHz 〜13GHz に おいて優れた電波吸収能を有するものが採用され、この周波数調整は例えばマン ガンジンクフェライトの場合、マンガン、亜鉛並びに酸化鉄の配合比率を調整す ることによって行われる。 Next, details of the present invention will be explained based on illustrated embodiments. Figure 1 shows the parameters of this invention. It is a cross-sectional explanatory view showing one example of a bola antenna. The parabolic antenna is bowl-shaped. It consists of a parabolic reflector 1 and a power receiving section 2 placed at the focal point of the parabolic reflector 1. has been completed. A converter 3 is located behind the power receiving unit 2 as seen from the parabolic reflector 1. is placed, and the original signal of 11GHz to 13GHz satellite broadcasting received by power receiving unit 2 is transmitted to 1GHz. After converting the signals into It is supplied to commercial tuners and television receivers. The present invention is applied within the outer periphery of the parabolic reflector 1. A special feature is that a radio wave absorber 8 is attached to the side over the entire circumference as shown in the front view of Figure 2. It is a sign. As the radio wave absorber 8, soft ferrite and/or carbon is used. A material dispersed in synthetic resins such as lipropylene and vinyl chloride is used, and is soft. Manganese zinc ferrite and nickel zinc ferrite are used as ferrite. I can be there. Carbon has an excellent ability to absorb ultraviolet rays and convert them into heat. By incorporating carbon, the deterioration of synthetic resin due to ultraviolet rays is suppressed. be able to. In addition, the radio wave absorber is suitable for the frequency band of satellite broadcasting, 11GHz to 13GHz. A material with excellent radio wave absorption ability is used for this frequency adjustment, for example. In the case of gun zinc ferrite, the blending ratio of manganese, zinc and iron oxide must be adjusted. This is done by
【０００９】 電波吸収体８を放物面反射器１の外周縁内側に取りつけたのは、不要電波を電 波吸収体内で熱に変換して減衰させることにより、外周縁エッジ部６への電波の 到達を抑制するとともに、外周縁で乱反射した電波が、放物面５に再入射したり 、位相がずれた電波が受電部２に入射するのを避ける為である。不要電波の発生 は外周縁エッジ部６での乱反射に起因すると推測されることから、電波吸収体は 外周縁エッジ部６で反射した電波のうち、少なくとも放物面５や受電部２へ向か う反射波の進行を阻止できるものであればよく、この意味からは図５に示す如く 、外周縁内側にのみ取りつけるだけでもよいが、隣接する他家のパラボラアンテ ナへの反射波の再入射防止を考慮するならば、図３及び図４に示すように外周縁 エッジ部６を含む周辺を電波吸収体８で完全被覆することが好ましい。[0009] The reason why the radio wave absorber 8 is attached inside the outer periphery of the parabolic reflector 1 is to eliminate unnecessary radio waves. By converting it into heat and attenuating it within the wave absorber, the radio waves are transmitted to the outer peripheral edge portion 6. In addition to suppressing the radio waves reaching the paraboloid 5, the radio waves diffusely reflected at the outer periphery may re-enter the paraboloid 5. This is to prevent out-of-phase radio waves from entering the power receiving unit 2. Generation of unnecessary radio waves It is assumed that this is caused by diffused reflection at the outer peripheral edge part 6, so the radio wave absorber is Of the radio waves reflected by the outer peripheral edge portion 6, at least some radio waves are directed toward the paraboloid 5 and the power receiving portion 2. Any device that can prevent the reflected waves from progressing is sufficient, and in this sense, as shown in Figure 5. , it is possible to install it only on the inside of the outer periphery, but it is also possible to install it only on the inside of the outer periphery. Considering the prevention of re-injection of reflected waves into the outer periphery as shown in Figs. It is preferable to completely cover the periphery including the edge portion 6 with the radio wave absorber 8.
【００１０】 電波吸収体８の放物面反射器１への固定方法は、接着による方法や固定具を用 いることも可能であるが、パラボラアンテナは風雨に晒されることから耐候性が 重要であり、又、部品点数を少なくする観点も重要であることから、凹凸嵌合に よるのが好ましい。凹凸嵌合の具体的方法は任意であり、例えば、図３に示すよ うに断面略コ字状に折曲させた電波吸収体８を放物面反射器１の外周縁に嵌合し たり、図４に示すように凸部９を有する電波吸収体８を形成し、前記凸部９を放 物面反射器１の外周縁内側に刻設した凹部に嵌合させること等が適宜採用される 。0010 The radio wave absorber 8 can be fixed to the parabolic reflector 1 by adhesion or by using a fixing device. However, since parabolic antennas are exposed to wind and rain, they are not weather resistant. This is important, and it is also important to reduce the number of parts, so it is important to use uneven fitting. Preferably. The specific method of uneven fitting is arbitrary; for example, as shown in Fig. 3. A radio wave absorber 8 bent into a substantially U-shaped cross section is fitted onto the outer periphery of the parabolic reflector 1. Alternatively, as shown in FIG. 4, a radio wave absorber 8 having a convex portion 9 is formed, and the convex portion 9 is Fitting into a recess carved inside the outer periphery of the object surface reflector 1 may be adopted as appropriate. .
【００１１】 電波吸収体８の形状としては放物面反射器１の曲面形状に沿ったもの以外にも 、電波減衰効果に優れた形状が採用され、例えば図６に示すように先端に向けて 肉厚を薄くしたくさび型のものや、図７に示す如く鋸歯状のもの等を採用するこ ともできる。又、図８に示すように鋸歯状の電波吸収体８表面における凹所に電 波吸収能を持たない樹脂10を充填して表面をフラットにすることによって電波吸 収体を保護することも可能である。[0011] The shape of the radio wave absorber 8 may be other than one that follows the curved shape of the parabolic reflector 1. , a shape with excellent radio wave attenuation effect is adopted, for example, as shown in Figure 6, It is possible to adopt a wedge-shaped one with a thinner wall or a saw-toothed one as shown in Figure 7. Can also be done. In addition, as shown in FIG. Radio wave absorption is achieved by filling the surface with resin 10 that does not have wave absorption ability and making the surface flat. It is also possible to protect the collection.
【００１２】 このように本考案のパラボラアンテナは、放物面反射器の外周縁内側に全周に わたって電波吸収体を取りつけたので、外周縁における乱反射がなくなり、外周 縁からの不要電波の反射をなくすことができる。したがって当該パラボラアンテ ナに接続されたテレビ受像器へのノイズ混入を少なくすることが可能となるとと もに隣接する他家のパラボラアンテナへの悪影響もなくすことができる。0012 In this way, the parabolic antenna of this invention has a Since the radio wave absorber is installed across the entire area, diffuse reflection at the outer periphery is eliminated, and the outer periphery is It can eliminate the reflection of unnecessary radio waves from the edges. Therefore, the parabolic antenna It would be possible to reduce noise intrusion into the television receiver connected to the It is also possible to eliminate the negative influence on parabolic antennas of other houses adjacent to the house.
【００１３】[0013]
本考案のパラボラアンテナは、放物面反射器の外周縁内側に全周にわたって衛 星放送の周波数帯域に対して電波吸収能を有する電波吸収体を取付けた構成とし たので、放物面反射器外周縁からの不要反射波の発生を抑止することができ、当 該パラボラアンテナに接続された受像機へのノイズ混入を避けることができると 同時に、隣接設置された他家のパラボラアンテナに対する不要反射波による悪影 響も防止することができる。 The parabolic antenna of this invention has a sanitary shield on the inside of the outer periphery of the parabolic reflector. The structure is equipped with a radio wave absorber that has the ability to absorb radio waves in the frequency band of the star broadcast. Therefore, it is possible to suppress the generation of unnecessary reflected waves from the outer periphery of the parabolic reflector. It is possible to avoid noise intrusion into the receiver connected to the parabolic antenna. At the same time, there is a negative impact caused by unnecessary reflected waves from the adjacent parabolic antenna of another house. It is also possible to prevent noise.
【００１４】 又、電波吸収体の中にカーボンを配合させたときには、カーボンは紫外線を吸 収して熱に変換する能力に優れていることから、樹脂の紫外線による劣化が抑止 され電波吸収体としての耐光性も向上させることができ、又、電波吸収体には嵌 合用凹部若しくは凸部を形成して、凹凸嵌合により放物面反射器の外周縁に取り つけるようにすれば、取付けが容易となるとともに風雨に晒されても電波吸収体 が脱落することはない。[0014] Also, when carbon is added to the radio wave absorber, carbon absorbs ultraviolet rays. Because it has an excellent ability to absorb water and convert it into heat, it prevents the resin from deteriorating due to ultraviolet rays. It is possible to improve the light resistance as a radio wave absorber, and it is also possible to A matching concave or convex portion is formed and attached to the outer periphery of the parabolic reflector by convex-concave fitting. This makes installation easier and prevents the radio wave absorber from being exposed to wind and rain. will not fall off.
【図１】本考案のパラボラアンテナの１実施例を示す断
面説明図[Fig. 1] Cross-sectional explanatory diagram showing one embodiment of the parabolic antenna of the present invention
【図２】同実施例における放物面反射器の正面図[Figure 2] Front view of the parabolic reflector in the same example
【図３】電波吸収体の具体的形状を示す実施例[Figure 3] Example showing the specific shape of the radio wave absorber
【図４】電波吸収体の具体的形状を示す実施例[Figure 4] Example showing the specific shape of the radio wave absorber
【図５】電波吸収体の具体的形状を示す実施例[Figure 5] Example showing the specific shape of the radio wave absorber
【図６】電波吸収体の具体的形状を示す実施例[Figure 6] Example showing the specific shape of the radio wave absorber
【図７】電波吸収体の具体的形状を示す実施例[Figure 7] Example showing the specific shape of the radio wave absorber
【図８】電波吸収体の具体的形状を示す実施例[Figure 8] Example showing the specific shape of the radio wave absorber
【図９】パラボラアンテナの概要を示す斜視図[Figure 9] Perspective view showing an overview of a parabolic antenna
【図１０】従来のパラボラアンテナを示す断面説明図[Fig. 10] Cross-sectional explanatory diagram showing a conventional parabolic antenna
【図１１】従来のパラボラアンテナにおける放物面反射
器外周縁での電波の反射状態を示す説明図[Fig. 11] An explanatory diagram showing the state of radio wave reflection at the outer periphery of a parabolic reflector in a conventional parabolic antenna.
【図１２】従来のパラボラアンテナにおける放物面反射
器外周縁に設けた延設部での電波の反射状態を示す説明
図FIG. 12 is an explanatory diagram showing the state of radio wave reflection at an extension provided on the outer periphery of a parabolic reflector in a conventional parabolic antenna.
１ 放物面反射器 ２ 受電部 ３ コンバータ ４ 同軸ケーブル ５ 放物面 ６ 外周縁エッジ部 ７ 延設部 ８ 電波吸収体 ９ 凸部 10 樹脂 1 Parabolic reflector 2 Power receiving section 3 Converter 4 Coaxial cable 5 Paraboloid 6 Outer periphery edge 7 Extension part 8 Radio wave absorber 9 Convex part 10 resin
Claims (4)
置された受電部とよりなるパラボラアンテナにおいて、
放物面反射器の外周縁内側に全周にわたって衛星放送の
周波数帯域に対して電波吸収能を有する電波吸収体を取
付けてなるパラボラアンテナ。Claim 1: A parabolic antenna comprising a parabolic reflector and a power receiving section disposed at the focal point of the parabolic reflector,
A parabolic antenna in which a radio wave absorber having radio wave absorbing ability for the frequency band of satellite broadcasting is attached to the inside of the outer periphery of a parabolic reflector over the entire circumference.
／又はカーボンを合成樹脂に分散配合したものを用いて
なる請求項１記載のパラボラアンテナ。2. The parabolic antenna according to claim 1, wherein the radio wave absorber is made of soft ferrite and/or carbon dispersed in a synthetic resin.
フェライト又はニッケルジンクフェライトを用いてなる
請求項２記載のパラボラアンテナ。3. The parabolic antenna according to claim 2, wherein the soft ferrite is manganese zinc ferrite or nickel zinc ferrite.
を形成したものを用いてなる請求項１、２又は３記載の
パラボラアンテナ。4. The parabolic antenna according to claim 1, wherein the radio wave absorber is formed with a fitting recess or a projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2533691U JPH04114211U (en) | 1991-03-22 | 1991-03-22 | parabolic antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2533691U JPH04114211U (en) | 1991-03-22 | 1991-03-22 | parabolic antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04114211U true JPH04114211U (en) | 1992-10-07 |
Family
ID=31910090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2533691U Pending JPH04114211U (en) | 1991-03-22 | 1991-03-22 | parabolic antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04114211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003298277A (en) * | 2002-03-29 | 2003-10-17 | Hitachi Metals Ltd | Radio wave absorption composite material and radio communication system using the same |
Citations (4)
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|---|---|---|---|---|
| JPS54146901A (en) * | 1978-05-08 | 1979-11-16 | Minnesota Mining & Mfg | Plastic tape reel |
| JPS5840449A (en) * | 1981-09-04 | 1983-03-09 | Matsushita Electric Ind Co Ltd | Heat pipe type solar heat water heater |
| JPS624400A (en) * | 1985-06-29 | 1987-01-10 | 内藤 喜之 | Antenna for microwave |
| JPS6437106A (en) * | 1987-08-01 | 1989-02-07 | Japan Tech Res & Dev Inst | Antenna |
-
1991
- 1991-03-22 JP JP2533691U patent/JPH04114211U/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54146901A (en) * | 1978-05-08 | 1979-11-16 | Minnesota Mining & Mfg | Plastic tape reel |
| JPS5840449A (en) * | 1981-09-04 | 1983-03-09 | Matsushita Electric Ind Co Ltd | Heat pipe type solar heat water heater |
| JPS624400A (en) * | 1985-06-29 | 1987-01-10 | 内藤 喜之 | Antenna for microwave |
| JPS6437106A (en) * | 1987-08-01 | 1989-02-07 | Japan Tech Res & Dev Inst | Antenna |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003298277A (en) * | 2002-03-29 | 2003-10-17 | Hitachi Metals Ltd | Radio wave absorption composite material and radio communication system using the same |
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