JP3239030B2 - Primary radiator for a parabolic antenna - Google Patents

Primary radiator for a parabolic antenna

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Publication number
JP3239030B2
JP3239030B2 JP31047294A JP31047294A JP3239030B2 JP 3239030 B2 JP3239030 B2 JP 3239030B2 JP 31047294 A JP31047294 A JP 31047294A JP 31047294 A JP31047294 A JP 31047294A JP 3239030 B2 JP3239030 B2 JP 3239030B2
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Prior art keywords
primary radiator
waterproof cover
parabolic antenna
opening
return loss
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JP31047294A
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JPH08167810A (en
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篤士 長野
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シャープ株式会社
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Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は衛星放送受信用のパラボラアンテナに関し、特にその一次放射器の構造に関す<br>る。 The present invention relates to an parabolic antenna for receiving satellite broadcasting, Ru <br> particularly regarding the structure of the primary radiator.

【0002】 [0002]

【従来の技術】従来の技術について、図7及び図8を参照して説明する。 For The prior art will be described with reference to FIGS. 図7は従来例による衛星放送受信用のパラボラアンテナの略側面図、図8は従来例によるパラボラアンテナ用の一次放射器の断面図である。 Figure 7 is a schematic side view of a parabolic antenna for receiving satellite broadcasting according to the conventional example, FIG. 8 is a sectional view of a primary radiator for a parabolic antenna according to the prior art.

【0003】パラボラアンテナによる衛星放送の受信は、一般に、図7に示すように、約12GHZの信号1 [0003] reception of the satellite by the parabolic antenna is generally as shown in FIG. 7, the signal of about 12 GHz 1
00をアンテナ部101で受け、このアンテナ部101 It received a 00 in the antenna unit 101, the antenna unit 101
で反射された信号100が一次放射器102の開口部1 In the reflected signal 100 of the primary radiator 102 opening 1
03に集中される。 It is concentrated to 03. そして、一次放射器102を通った電波は、一次放射器102の後部に配したダウンコンバータ104によって、約12GHZから約1GHZの信号に変換される。 Then, the radio waves through the primary radiator 102, the down-converter 104 arranged in the rear of the primary radiator 102 is converted from approximately 12GHZ the signal about 1GHZ. この変換を行う目的は、信号が12G The purpose of performing this conversion, the signal is 12G
HZのままであると、この信号を送信する途中で損失が非常に大きくなるためである。 If left in HZ, because the losses on the way to transmit this signal becomes extremely large. 変換された信号はケーブル105を通って、一般家庭等のBSチューナ106に送られる。 Converted signal through the cable 105, is sent to the BS tuner 106 for general household.

【0004】図7に示すパラボラアンテナの一次放射器102は円筒形状を有しており、図8に示すように、一次放射器102の本体に対して、防水カバー107がネジ嵌合部108においてネジ固定されている。 [0004] The primary radiator 102 of the parabolic antenna shown in FIG. 7 has a cylindrical shape, as shown in FIG. 8, with respect to the body of the primary radiator 102, the waterproof cover 107 is in threaded engagement portion 108 It is screwed. 防水カバー107は、外部から一次放射器102の内部へ雨等が入らないようにするためのものである。 Waterproof cover 107 is intended to prevent the rain or the like from the outside to the inside of the primary radiator 102 from entering. 一次放射器本体102と防水カバー107の間にはOリング109が介挿されており、このOリング109がネジの嵌合によってつぶされることにより防水機能がもたらされている。 Between the primary radiator body 102 and the waterproof cover 107 has O-ring 109 is interposed, waterproof function is provided by the O-ring 109 is collapsed by engagement of the screw.

【0005】以上のような構造において、防水カバー1 [0005] In the structure as described above, the waterproof cover 1
07は一般に、プラスチック等の樹脂で形成されているため、大きな誘電率を有しており、一次放射器102の開口部103の開口面110との距離を調整しないと、 07 is generally because they are formed of resin such as plastic, has a large dielectric constant, unless adjusting the distance between the opening face 110 of the opening 103 of the primary radiator 102,
リターンロスに悪影響を及ぼすという問題があった。 There is a problem that adversely affect the return loss. ここで、リターンロスとは、外部から一次放射器102に入ってくる電波の内、どれだけの量が通過せずに入射方向に反射されて戻ってしまうかを示したもので、dB単位によって示される。 Here, the return loss, shows the one of the radio wave entering the primary radiator 102 from the outside, the amount of how much will be reflected back to the incident direction without passing by in dB It is shown. 電波が理想的にすべて通過した場合を−∞dB,逆にすべて反射されてしまう場合を0d A case in which radio waves from being reflected every case where ideally all through -∞dB, conversely 0d
Bとしている。 It is set to B. 図8に示した構造の場合、リターンロスは約−20dBである。 If the structure shown in FIG. 8, the return loss is about -20 dB.

【0006】従来は、リターンロスの調整として、図8 [0006] In the past, as an adjustment of the return loss, as shown in FIG. 8
に示すように、一次放射器本体102の開口面110より防水カバー107の天面までの距離Lを、波長λの1 As shown in, the distance L to the top surface of the primary radiator aperture plane 110 than the waterproof cover 107 of the body 102, the wavelength lambda 1
/2、即ち、約12mm程度とっており、開口面110 / 2, i.e., has taken about 12 mm, open surface 110
から前方にかなり突出する形状となっていた。 It had a shape considerably projecting forward from.

【0007】 [0007]

【発明が解決しようとする課題】ところで、防水カバー107の高さが図8の従来例のように高いと、降雪量の多い地域にあっては、この防水カバー107の上に雪が積もり、電波受信の妨害となる場合があった。 Meanwhile [0008], the height of the waterproof cover 107 is high as in the conventional example of FIG. 8, in the region there are many snowfall, Snow is piled up on top of the waterproof cover 107, Telecommunications there have been cases where the interference received. しかし、 But,
単純に防水カバー107の高さを低くすると、リターンロス特性が劣化してしまう。 When simply reducing the height of the waterproof cover 107, the return loss characteristics deteriorate.

【0008】また、防水カバー107が突出するように形成されているために、プラスチック等の樹脂量が多くコストアップにもつながっていた。 Further, in order to waterproof cover 107 is formed so as to protrude, which leads to weight resin is more cost plastic or the like.

【0009】そこで、本発明の目的は、一次放射器の防水カバーの高さが低く、上記問題を解消でき、しかも高さを低くしてもリターンロスに悪影響がないパラボラアンテナ用一次放射器を提供することにある。 An object of the present invention has a low height of the waterproof cover of the primary radiator, can solve the above problems, moreover primary radiator for a parabolic antenna is not adversely affected the return loss even with a lower height It is to provide.

【0010】 [0010]

【課題を解決するための手段】前記目的を達成するために、本発明は、 一次放射器の電波伝送用の本体の端部開口部に防水カバーを設けたパラボラアンテナ用一次放射器において、前記防水カバーの内壁面に誘電体からなり前記開口部に向かうリターンロス調整用の突出部を設けてなり、該突出部は前記防水カバーに一体的に形成されてなることを特徴とする。 To SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a primary radiator for a parabolic antenna provided with a waterproof cover to the end opening of the main body for radio transmission of the primary radiator, the it is provided a projection for return loss adjustment towards the opening a dielectric the inner wall surface of the waterproof cover, the projecting portion, characterized by comprising integrally formed on the waterproof cover.

【0011】 [0011]

【0012】さらに、上記突出部を、前記開口部に向かって空洞円筒状に形成してなることを特徴とする。 Furthermore, the protrusions, and characterized by being formed in a hollow cylindrical shape toward the opening.

【0013】また、前記突出部は、前記防水カバーの内側で、且つ前記電波伝送用の本体の中心軸上に設けられてなることを特徴とする。 Further, the protruding portion, inside of the waterproof cover, and wherein the thus provided on the central axis of the main body of the radio wave transmission. また、本発明は、 一次放射器 Further, the present invention, the primary radiator
電波伝送用の本体の端部開口部に防水カバーを設けたパラボラアンテナ用一次放射器において、前記防水カバーの内壁面に、誘電体からなり前記開口部に向かうリターンロス調整用の突出部を設けてなり、該突出部は、前記防水カバーの内側で、且つ前記電波伝送用の本体の中心軸上に設けられてなることを特徴とする。 In the radio wave transmission body of the end portion primary radiator for a parabolic antenna provided with a waterproof cover the opening for the the inner wall surface of the waterproof cover, the protrusion for return loss adjustment towards the opening a dielectric provided becomes, the projecting portion is inside of the waterproof cover, and wherein the thus provided on the central axis of the main body of the radio wave transmission. さらに、前記突出部は、前記開口部に向かって円柱形状又は空洞円筒状に形成されてなることを特徴とする。 Further, the protruding portion is characterized by formed by a columnar shape or hollow cylindrical shape toward the opening.

【0014】 [0014]

【作用】本発明によるパラボラアンテナ用一次放射器 [Action] In primary radiator for a parabolic antenna according to the invention
は、以上のように、防水カバーの内壁側に誘電体からなり前記開口部に向かうリターンロス調整用の突出部を設けることによって、防水カバーの高さを低くしてもリターンロスに悪影響が生じない。 , As described above, by providing the protrusion for return loss adjustment towards the opening a dielectric on the inner wall of the waterproof cover, adversely affected even return loss to reduce the height of the waterproof cover Absent.

【0015】従って、従来通りのリターンロス特性を確保したままで、従来防水カバーが高かったことによる問題、即ち、1)防水カバーの上に雪が積もり、やはり電波受信の妨害となった点、さらに、2)防水カバーが突出するように形成されているために、プラスチック等の樹脂量が多くコストアップにもつながっていた点を解消でき、低コストで高信頼性のパラボラアンテナ用一次放射器を実現できる。 [0015] Therefore, while ensuring the return loss characteristics of the conventional problems caused by the conventional waterproof cover was high, i.e., 1) that estimates the snow on the waterproof cover, became also of radio reception interference, further , 2) in order to waterproof cover is formed so as to protrude, can eliminate the point where weight resin such as plastic had led to many cost, the primary radiator for reliability of a parabolic antenna with a low cost realizable.

【0016】実際には、上記突出部の大きさ、形状を微調整して、その結果のリターンロス特性を観測しながら調整するので、この突出部は整合素子としての作用をする。 [0016] In practice, the upper Ki突 out of size, shape and fine adjustment, since the adjustment while observing the return loss characteristics of the result, the projection acts as a matching element.

【0017】 さらに、上記突出部防水カバーと一体的に形成するので 、部品点数が低減できる上、接着工程も省略できる。 Furthermore, Runode to form the projecting portion in the waterproof cover integrally, parts on the number can be reduced, it can be omitted also bonding process.

【0018】さらに、この一体化した誘電体の内部を円筒状に空洞となるように形成することによって、誘電体の位置に相当する防水カバー外部の部分に外観ひけ(へこみ)が生じることがない。 Furthermore, by forming such a cavity inside of the integral dielectric cylindrical, never look shrinkage (recessed) occurs in the waterproof cover outside the portion corresponding to the position of the dielectric . 外観ひけが生じると、この窪みの部分が例え微小であっても、雪等が積もることによって電波障害が生じることが判明している。 When appearance shrinkage occurs, even small even the portion of the recess, it has been found that interference will occur by the snow or the like to be accumulated.

【0019】また、 本発明によるパラボラアンテナ用一 [0019] In addition, one for a parabolic antenna according to the present invention
次放射器によれば、防水カバーの内壁側に誘電体からな According to the next radiator, it from the dielectric the inner wall side of the waterproof cover
り前記開口部に向かうリターンロス調整用の突出部を Ri protrusions for return loss adjustment towards the opening,
一次放射器の電波伝送用本体の中心軸上に配置することによって、軸比の劣化がなく高信頼性を保証できる。 By placing on the center axis of the wave transmission body of the primary radiator can ensure high reliability without degradation of the axial ratio.

【0020】 [0020]

【実施例】本発明の特徴は、パラボラアンテナ用の一次放射器(以下、単に一次放射器と記す)の防水カバーの内側に開口面に向かう誘電体を設けた点にある。 EXAMPLES The features of the present invention, the primary radiator for a parabolic antenna (hereinafter, simply referred to as a primary radiator) lies in having a dielectric toward the opening surface on the inner side of the waterproof cover. これによって、リターンロスを損なうことなく、防水カバーの高さを低くすることができた。 Thus, without impairing the return loss, it was possible to reduce the height of the waterproof cover.

【0021】以下、図面に従って詳細に説明する。 [0021] will be described in detail below with reference to the accompanying drawings. 図1 Figure 1
乃至図6は、本発明の一次放射器を説明するための図面で、図1は本発明の一実施例による一次放射器の断面図、図2は図1と比較するための一次放射器の断面図、 To 6, in drawing for explaining the primary radiator of the present invention, FIG. 1 is a sectional view of a primary radiator according to an embodiment of the present invention, the primary radiator for comparing FIG. 2 and FIG. 1 sectional view,
図3は図1及び図2の一次放射器のリターンロスを比較する特性図、図4は本発明の他の実施例による一次放射器の断面図、図5は本発明のさらに他の実施例による一次放射器の断面図、図6は本発明のさらに他の実施例による一次放射器の断面図である。 Figure 3 is a characteristic diagram for comparing the return loss of the primary radiator of Figure 1 and Figure 2, a cross-sectional view of a primary radiator according to another embodiment of FIG. 4 is the invention, another embodiment of FIG. 5 is the invention sectional view of a primary radiator according to FIG. 6 is a sectional view of a primary radiator according to another embodiment of the present invention.

【0022】なお、図8に示した従来例と同一機能部分には同一記号を付している。 [0022] are denoted by the same symbols in the conventional example and the same functional portions as shown in FIG.

【0023】図1に示すように、本実施例においては、 As shown in FIG. 1, in this embodiment,
防水カバー107の内側に一次放射器の開口部103に向かう円柱形状の誘電体1を設けている。 And a dielectric 1 cylindrical toward the opening 103 of the primary radiator to the inside of the waterproof cover 107 is provided. この誘電体1 The dielectric 1
は、接着剤によって防水カバー107に接着固定されている。 It is bonded and fixed to the waterproof cover 107 by an adhesive.

【0024】各部の大きさは、一次放射器102の端部開口面110の直径が30mm、誘電体1の厚みは約5 The size of each part, the primary radiator 102 ends diameter 30mm opening surface 110, the thickness of the dielectric 1 to about 5
〜6mm、直径は8mmである。 ~6mm, a diameter of 8mm.

【0025】そして、この防水カバー107の高さは、 [0025] The height of the waterproof cover 107,
図8に示した従来例に比し非常に低くしている。 It is very low compared to the conventional example shown in FIG. 従来であれば、防水カバー107の天面と開口面間の距離Lを波長λの1/2より小さくするとリターンロスが大きくなってしまうという問題があったが、本実施例のように誘電体1を設けることによって、距離Lを短くしてもリターンロスの改善が図れることが判明した。 If the past, there is a problem that top and smaller for the return loss than 1/2 of the distance L between the opening surface wavelength λ of the waterproof cover 107 becomes large, dielectric as in this embodiment by providing one, even by shortening the distance L has been found that attained improvement of return loss. 図1の場合の距離Lは2〜3mmであり、図8に示す従来例の距離L(=12mm)よりかなり高さを低くできたことがわかる。 The distance L in the case of FIG. 1 is a 2 to 3 mm, it can be seen that can be lowered significantly higher than the distance of the conventional example shown in FIG. 8 L (= 12mm).

【0026】このように、誘電体1を設けることによって、距離Lを短くしても理想的なリターンロスが得られることを、図2の構造との比較を行う図3を参照して説明する。 [0026] Thus, by providing the dielectric 1, even a shorter distance L ideal that the return loss is obtained, will be described with reference to FIG. 3 for comparison with the structure in FIG. 2 . 図2は防水カバー107の高さを、図1と同様の距離Lを有し、且つ、誘電体を防水カバー107内に設けていない一次放射器の断面図である。 Figure 2 is the height of the waterproof cover 107 has the same distance L between 1 and is a cross-sectional view of a primary radiator provided with no dielectric waterproof cover 107. 図3は、この図2の構造と図1の構造によって得られるリターンロスを比較した特性図である。 Figure 3 is a characteristic diagram comparing the return loss obtained by the structure of the structure and FIG. 1 in FIG. 2.

【0027】図3において、実線が図1の構造によるリターンロス、点線が図2の構造によるリターンロスの特性である。 [0027] In FIG. 3, the solid line is the return loss due to the structure of FIG. 1, the dotted line is a characteristic of return loss due to the structure of FIG. 図3から明らかなように、衛星放送の電波受信帯域(11.7〜12GHZ)においては、図2の構造のリターンロスが約−13dB、図1の構造のリターンロスは約−20dBであり、本実施例のように誘電体1を設けたことによって、優れたリターンロス特性が得られたことが判る。 As apparent from FIG. 3, in the radio reception band satellite (11.7~12GHZ), return loss of the structure of FIG. 2 is about -13 dB, the return loss of the structure of FIG. 1 is about -20 dB, by providing the dielectric 1 as in this embodiment, it can be seen that obtained excellent return loss characteristics.

【0028】ところで、図8に示した従来構造のリターンロスも約−20dBである。 By the way, it is return loss also about -20dB of the conventional construction shown in FIG. 8. このように、図1の構造は、上記電波受信帯域におけるリターンロス特性に関して、図8の従来構造の一次放射器と比較して何等遜色ない。 Thus, the structure of Figure 1, with respect to return loss characteristics in the radio reception band, whatever not inferior as compared to the primary radiator of the conventional structure of FIG.

【0029】なお、周波数帯域によっては、図2の誘電体1を設けていない構造の方が優れた特性となっているところがあるが、衛星放送の受信帯域を外れた箇所になっているので問題はない。 [0029] Note that the frequency band, a problem since there is a place where the direction of the structure not provided with the dielectric 1 of FIG. 2 has a superior characteristic, has at a place outside the reception band satellite no. 実際の設計に当たっては、誘電体1の大きさ、形状等によってリターンロスが微妙に変化するので、受信帯域(11.7〜12GHZ)において理想的なリターンロスが得られるように誘電体の大きさ等を調整する。 In actual design, the size of the dielectric 1, the return loss is changed delicately depending on the shape or the like, ideal as return loss is obtained dielectric in the reception band (11.7~12GHZ) size such as to adjust.

【0030】以上のように、本実施例によれば、従来と同レベルのリターンロスを確保しつつ、防水カバーの高さを低くできるので、従来構造の問題点、即ち、1)防水カバーの上に雪が積もり、電波受信の妨害となる、 [0030] As described above, according to this embodiment, while ensuring the return loss of the conventional value level, it is possible to reduce the height of the waterproof cover, problems of the conventional structure, i.e., 1) of the waterproof cover snow is piled up to the top, the interference of the radio wave reception,
2)防水カバーが突出するように形成されているために、プラスチック等の樹脂量が多くコストアップにもつながっていた、といった点を解消でき、低コストで高信頼性の一次放射器を実現できる。 To 2) waterproof cover is formed to protrude, the resin amount of such plastic had led to many cost, it can eliminate points such, it is possible to realize a primary radiator of high reliability at low cost .

【0031】図4は本発明の他の実施例である。 [0031] FIG. 4 shows another embodiment of the present invention. 図1の実施例と異なるところは、誘電体1を防水カバー107 Example differs from the Figure 1, the waterproof cover dielectric 1 107
と一体とした点である。 And in that was integrated. 本実施例によれば、防水カバー成形用の金型を一部変えることによって、図1の実施例に比べて部品点数が1個減り、また別体の誘電体を防水カバーに接着する工程も不要となるので、図1に比べて製造工程の簡略化を図れる。 According to this embodiment, by changing a part of the mold for the waterproof cover molding reduces one of parts as compared with the embodiment of FIG. 1, and also the step of bonding the dielectric separate waterproof cover since unnecessary, thereby simplifying the manufacturing process compared to the FIG.

【0032】図5は図4をさらに改良した変形例である。 [0032] FIG. 5 shows a variation in which a further improvement to FIG. 図4の場合、誘電体を設けたボス部の肉厚が他の部分に比べて厚くなるので、樹脂成形の際に、誘電体を設けた位置に相当する防水カバー107の外部に外観ひけ(へこみ)が生じる場合があることがわかった。 In FIG. 4, since the thickness of the boss portion provided with a dielectric is thicker than the other portions, at the time of resin molding, external appearance shrinkage of the waterproof cover 107 corresponding to the position in which a dielectric ( it was found that there is a case in which a dent) occurs. 外観ひけが生じると、この窪みの部分が例え微小であっても、 When appearance shrinkage occurs, even small even the portion of the recess,
雪等が積もることによって電波障害となることがわかっている。 It has been found that the interference by the snow and the like to be accumulated. 例えば、従来の防水カバーの構造として、リターンロス特性の整合のために天面部を凹状にくぼませるものがあったが、これは特に積雪の多い地域において、 For example, a structure of a conventional waterproof cover, there was that recessing the top surface portion for alignment of the return loss characteristics in a concave shape, which especially in large areas of snow,
防水カバー上に雪が積もり電波障害を引き起こすことが報告されている。 It has been reported that the snow on the waterproof cover can cause radio interference estimates.

【0033】そこで、本実施例においては、図5のように、誘電体の部分を円筒状にすることによって、誘電体を設ける部分と他の部分の肉厚をなるべく均一化して、 [0033] Therefore, in the present embodiment, as shown in FIG. 5, by the portion of the dielectric cylinder, and as uniformly as possible the thickness of the part and the other part providing the dielectric,
この外観ひけが生じないようにしている。 This appearance sink is that you do not occur.

【0034】以上の図3乃至図5の構造によっても、図1の構造と同様の効果が得られるのは当然である。 [0034] Also the structure of the above FIGS. 3 to 5, is of course the same effect as the structure of FIG. 1 can be obtained. また、図1及び図3乃至図5の構造においては、誘電体の配置は、一次放射器の中心軸上になるようにしているが、さらに他の実施例として図6に示すような構造も考えられる。 In the structure of FIG. 1 and FIGS. 3 to 5, the arrangement of the dielectric body is is set to be on the central axis of the primary radiator, also the structure as further shown in FIG. 6 as another embodiment Conceivable. しかし、円偏波受信の場合は、誘電体が一次放射器102の中心軸上にないと、軸比の劣化があるため、図1、図3乃至図5の構造が理想的である。 However, in the case of circularly polarized wave reception, the dielectric is not on the central axis of the primary radiator 102, because of the degradation of the axial ratio, FIG. 1, is ideal structure of FIGS. 3-5.

【0035】 [0035]

【発明の効果】以上、詳細に説明したように、本発明によれば、パラボラアンテナ用の一次放射器において、従来構造と変わらないリターンロス特性を確保しつつ、防水カバーの高さを低くできる。 Effect of the Invention] As described above in detail, according to the present invention, in a primary radiator for a parabolic antenna, while ensuring the return loss characteristics unchanged from the conventional structure, it can reduce the height of the waterproof cover . このため、従来構造の問題点、即ち、1)防水カバーの上に雪が積もり、電波受信の妨害となる、2)防水カバーが突出するように形成されているために、使用されるプラスチック等の樹脂量が多くコストアップにつながっていた、といった点を解消でき、低コストで高信頼性の一次放射器を実現できる。 Therefore, problems of the conventional structure, i.e., 1) piled up snow on the waterproof cover, the interference wave reception, 2) in order to waterproof cover is formed so as to protrude, such as plastics used weight resin had led to many cost, it can eliminate points such, it is possible to realize a primary radiator of high reliability at low cost.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例によるパラボラアンテナ用一次放射器の断面図である。 1 is a cross-sectional view of a primary radiator for a parabolic antenna according to an embodiment of the present invention.

【図2】図1と比較するための一次放射器の断面図である。 2 is a cross-sectional view of a primary radiator for comparison with FIG.

【図3】図1と図2の構造による一次放射器のリターンロスを比較するための特性図である。 3 is a characteristic diagram for comparing the return loss of the primary radiator according to the structure of Figure 1 and Figure 2.

【図4】本発明の他の実施例による一次放射器の断面図である。 It is a cross-sectional view of a primary radiator according to another embodiment of the present invention; FIG.

【図5】本発明のさらに他の実施例による一次放射器の断面図である。 It is a cross-sectional view of a primary radiator according to another embodiment of the present invention; FIG.

【図6】本発明のさらに他の実施例による一次放射器の断面図である。 6 is a cross-sectional view of a primary radiator according to another embodiment of the present invention.

【図7】一般的なパラボラアンテナの略側面図である。 7 is a schematic side view of a typical parabolic antenna.

【図8】従来例による一次放射器の断面図である。 8 is a cross-sectional view of a primary radiator according to a conventional example.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 誘電体(突出部) 102 パラボラアンテナ用一次放射器(本体) 103 開口部 107 防水カバー 110 開口面 First dielectric (protrusion) 102 primary radiator for a parabolic antenna (main body) 103 opening 107 waterproof cover 110 open face

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl. 7 ,DB名) H01Q 1/42 H01Q 13/02 ────────────────────────────────────────────────── ─── of the front page continued (58) investigated the field (Int.Cl. 7, DB name) H01Q 1/42 H01Q 13/02

Claims (5)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 一次放射器の電波伝送用の本体の端部開口部に防水カバーを設けたパラボラアンテナ用一次放射器において、 前記防水カバーの内壁面に、誘電体からなり前記開口部に向かうリターンロス調整用の突出部を設けてなり、 該突出部は前記防水カバーに一体的に形成されてなることを特徴とするパラボラアンテナ用一次放射器。 1. A primary radiator for a parabolic antenna provided with a waterproof cover to the end opening of the main body for radio transmission of the primary radiator, the the inner wall surface of the waterproof cover, toward the opening a dielectric it is provided a projection for return loss adjustment, primary radiator for a parabolic antenna of the projecting portion, characterized by comprising integrally formed on the waterproof cover.
  2. 【請求項2】 請求項1に記載のパラボラアンテナ用一次放射器において、前記突出部は、前記開口部に向かって空洞円筒状に形成されてなることを特徴とするパラボラアンテナ用一次放射器。 2. A primary radiator for a parabolic antenna according to claim 1, wherein the protrusion primary radiator for a parabolic antenna, characterized by comprising formed in the cavity cylindrical shape toward the opening.
  3. 【請求項3】 請求項1又は2に記載のパラボラアンテナ用一次放射器において、前記突出部は前記防水カバーの内側で、且つ前記電波伝送用の本体の中心軸上に設けられてなることを特徴とするパラボラアンテナ用一次放射器。 3. A primary radiator for a parabolic antenna according to claim 1 or 2, wherein the protrusions on the inside of the waterproof cover, and to become disposed on the central axis of the main body of the radio wave transmission primary radiator for a parabolic antenna according to claim.
  4. 【請求項4】 一次放射器の電波伝送用の本体の端部開口部に防水カバーを設けたパラボラアンテナ用一次放射器において、 前記防水カバーの内壁面に、誘電体からなり前記開口部に向かうリターンロス調整用の突出部を設けてなり、 該突出部は前記防水カバーの内側で、且つ前記電波伝送用の本体の中心軸上に設けられてなることを特徴とするパラボラアンテナ用一次放射器。 4. A primary radiator for a parabolic antenna provided with a waterproof cover to the end opening of the main body for radio transmission of the primary radiator, the the inner wall surface of the waterproof cover, toward the opening a dielectric it is provided a projection for return loss adjustment, the projecting portion on the inside of the waterproof cover, and the microwave transmission primary radiator for a parabolic antenna, characterized by comprising provided on the center axis of the body for .
  5. 【請求項5】 請求項4に記載のパラボラアンテナ用一次放射器において、前記突出部は、前記開口部に向かって円柱形状又は空洞円筒状に形成されてなることを特徴とするパラボラアンテナ用一次放射器。 5. The primary radiator for a parabolic antenna according to claim 4, wherein the protruding portion includes a primary dish, characterized in that formed by a columnar shape or hollow cylindrical shape toward the opening radiator.
JP31047294A 1994-12-14 1994-12-14 Primary radiator for a parabolic antenna Expired - Fee Related JP3239030B2 (en)

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