【０００１】[0001]
【発明の属する技術分野】本発明は、例えば衛星放送受
信用パラボラアンテナにおいて、広帯域に亘り良好な円
偏波軸比特性を有するパラボラアンテナ用１次放射器及
び衛星放送受信用コンバータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parabolic antenna for satellite broadcasting reception, a primary radiator for a parabolic antenna having a good circular polarization axis ratio characteristic over a wide band, and a converter for satellite broadcasting reception.
【０００２】[0002]
【従来の技術】従来、円偏波受信用パラボラアンテナに
用いられる１次放射器は、図６に示すように構成されて
いる。図６において、１１は有底円筒状のケース本体
で、このケース本体１１の前面開口部にパラボラ反射鏡
（図示せず）からの電波を受信するホーン部１２が一体
に設けられている。上記ケース本体１１内には、直線偏
波と円偏波の変換を行なう円偏波発生器１３が配置され
る。この円偏波発生器１３は、板状誘電体により形成し
たもので、長方形の誘電体の左右両辺に切り込み部を設
けた形状となっている。また、ケース本体１１には、上
記円偏波発生器１３の切り込み部から所定距離離れた位
置に回路側との接続部となる給電部１４が設けられる。
なお、上記円偏波発生器１３は、給電部１４に対して４
５°傾斜して配置される。2. Description of the Related Art Conventionally, a primary radiator used in a parabolic antenna for receiving circularly polarized waves is constructed as shown in FIG. In FIG. 6, reference numeral 11 denotes a bottomed cylindrical case body, and a horn portion 12 for receiving radio waves from a parabolic reflector (not shown) is integrally provided at the front opening of the case body 11. In the case body 11, a circular polarization generator 13 that converts linearly polarized waves and circularly polarized waves is arranged. The circularly polarized wave generator 13 is formed of a plate-shaped dielectric material, and has a shape in which cutouts are provided on both left and right sides of a rectangular dielectric material. Further, the case main body 11 is provided with a power feeding portion 14 serving as a connection portion with the circuit side at a position separated from the cut portion of the circularly polarized wave generator 13 by a predetermined distance.
It should be noted that the circular polarization generator 13 has four
It is placed at an angle of 5 °.
【０００３】そして、上記ホーン部１２の開口部には、
１次放射器を保護するために、誘電体により形成したホ
ーンカバー１５が設けられる。更に、このホーンカバー
１５の中央部内側には、反射損失特性並びに円偏波軸比
特性を改善するための突起１６が一体に設けられる。こ
の突起１６は、該当電波の約１／４波長の奇数倍の長さ
に、誘電体の波長短縮率を乗じた長さに設定される。Then, in the opening of the horn portion 12,
A horn cover 15 formed of a dielectric material is provided to protect the primary radiator. Further, a protrusion 16 for improving the reflection loss characteristic and the circular polarization axis ratio characteristic is integrally provided inside the central portion of the horn cover 15. The protrusion 16 is set to have a length obtained by multiplying the length of an odd multiple of about 1/4 wavelength of the radio wave by the wavelength shortening rate of the dielectric.
【０００４】上記のようにホーン部１２の内部を保護す
るために誘電体のホーンカバー１５が一般に用いられて
いる。しかし、このホーンカバー１５を設けることによ
って、１次放射器内部で電波が多重反射し、１次放射器
の諸特性が劣化する。特に、円偏波軸比特性において
は、周波数帯域が狭帯域となる。従来では、上記ホーン
カバー１５により電波の反射をホーンカバー１５に設け
た突起１６により打ち消している。すなわち、誘電体の
突起１６により位相を１８０°進めた反射波を発生さ
せ、ホーンカバー１５による反射波と打ち消し合うよう
に作用させている。As described above, the dielectric horn cover 15 is generally used to protect the inside of the horn portion 12. However, the provision of the horn cover 15 causes multiple reflection of radio waves inside the primary radiator, degrading various characteristics of the primary radiator. In particular, the circular polarization axial ratio characteristic has a narrow frequency band. Conventionally, the projection of the radio wave reflected by the horn cover 15 is canceled by the projection 16 provided on the horn cover 15. That is, the projection 16 of the dielectric material generates a reflected wave whose phase is advanced by 180 °, and acts so as to cancel out the reflected wave by the horn cover 15.
【０００５】[0005]
【発明が解決しようとする課題】上記のようにホーンカ
バー１５の内側に突起１６を設けることにより、広周波
数帯域に亘って良好な円偏波軸比特性を得ることができ
る。By providing the protrusion 16 inside the horn cover 15 as described above, a good circular polarization axis ratio characteristic can be obtained over a wide frequency band.
【０００６】しかし、誘電体の突起１６をホーンカバー
１５と一体で成型するためには、ホーンカバー１５の突
起部付近の寸法を厚くしなければ、希望とする寸法精度
が得られず、また、突起部付近の寸法を厚くすると、ホ
ーンカバー１５における通過損失が大きくなり、パラボ
ラアンテナ総合での受信レベルが劣化するという問題が
あった。However, in order to mold the dielectric protrusion 16 integrally with the horn cover 15, the desired dimensional accuracy cannot be obtained unless the dimension near the protrusion of the horn cover 15 is increased, and If the dimension in the vicinity of the protrusion is increased, the passage loss in the horn cover 15 increases, and there is a problem that the reception level of the parabolic antenna as a whole deteriorates.
【０００７】本発明は上記の課題を解決するためになさ
れたもので、ホーンカバーの寸法を厚く形成する必要が
なく、ホーン内部での多重反射を抑え、良好な反射損失
特性並びに広周波数帯域に亘って良好な円偏波軸比特性
を得ることができ、電気特性の優れたパラボラアンテナ
用１次放射器及び衛星放送受信用コンバータを提供する
ことを目的とする。The present invention has been made in order to solve the above-mentioned problems, and it is not necessary to form the horn cover thickly, the multiple reflection inside the horn is suppressed, and the good reflection loss characteristic and the wide frequency band are obtained. It is an object of the present invention to provide a primary radiator for a parabolic antenna and a converter for satellite broadcast reception, which can obtain a good circular polarization axis ratio characteristic throughout and have excellent electrical characteristics.
【０００８】[0008]
【課題を解決するための手段】本発明は、円偏波を送受
信するパラボラアンテナの１次放射器において、ケース
本体の開口部に設けられ、パラボラ反射鏡からの電波を
受信するホーン部と、このホーン部の開口部に設けられ
る誘電体のホーンカバーと、前記ケース本体内に設けら
れる給電部と、前記ケース本体内に設けられ、円偏波を
直線偏波に変更する誘電体からなる円偏波発生器と、前
記ホーンカバーの中央部内側より入射電波の約１／４波
長の距離に配置され、前記円偏波発生器に支持部を介し
て一体に設けられる誘電体板とを具備したことを特徴と
する。According to the present invention, in a primary radiator of a parabolic antenna for transmitting and receiving circularly polarized waves, a horn portion is provided in an opening of a case body and receives a radio wave from a parabolic reflector. A horn cover made of a dielectric material provided in the opening of the horn section, a power feeding section provided in the case body, and a circle made of a dielectric material provided in the case body for changing circular polarization into linear polarization.Approximately 1/4 wave of the incident radio wave from the inside of the central part of the polarization generator and thehorn cover
It is characterized by comprising adielectric plate arranged at along distance and integrally provided on the circularly polarized wave generator via a supporting portion.
【０００９】上記のように筒状誘電体をホーンカバーか
ら独立して設け、円偏波発生器と一体に成型することに
より、ホーンカバーを十分な薄さで成型することが可能
となり、アンテナの受信レベルを低下させることなく、
ホーン内部での多重反射を抑え、良好な反射損失特性並
びに広周波数帯域に亘り良好な円偏波軸比特性を得るこ
とができる。As described above, by providing the cylindrical dielectric independently of the horn cover and molding it integrally with the circularly polarized wave generator, it becomes possible to mold the horn cover with a sufficiently thin thickness, and the antenna cover Without reducing the reception level
Multiple reflections inside the horn can be suppressed, and good reflection loss characteristics and good circular polarization axis ratio characteristics over a wide frequency band can be obtained.
【００１０】[0010]
【発明の実施の形態】以下、図面を参照して本発明の実
施形態を説明する。（第１実施形態）図１は、本発明の第１実施形態に係る
パラボラアンテナ用１次放射器２０の構成を示す断面図
である。図１において、１１は有底円筒状のケース本体
で、このケース本体１１の前面開口部にパラボラ反射鏡
（図示せず）からの電波を受信するホーン部１２が一体
に設けられている。更に、このホーン部１２の開口部に
は、１次放射器を保護するために、誘電体により形成し
たホーンカバー２１が設けられる。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a sectional view showing the structure of a primary radiator 20 for a parabolic antenna according to a first embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a bottomed cylindrical case body, and a horn portion 12 for receiving a radio wave from a parabolic reflector (not shown) is integrally provided at the front opening of the case body 11. Further, a horn cover 21 made of a dielectric material is provided in the opening of the horn portion 12 in order to protect the primary radiator.
【００１１】そして、上記ケース本体１１内には、直線
偏波と円偏波の変換を行なう円偏波発生器１３が配置さ
れる。この円偏波発生器１３は、板状誘電体により形成
したもので、長方形の誘電体の左右両辺に切り込み部を
設けた構造となっており、また、ケース本体１１には、
上記円偏波発生器１３の切り込み部から所定距離離れた
位置に給電部１４が設けられる。なお、上記円偏波発生
器１３は、給電部１４に対して４５°傾斜して配置され
る。A circular polarization generator 13 for converting linear polarization and circular polarization is arranged in the case body 11. The circularly polarized wave generator 13 is formed of a plate-shaped dielectric material, and has a structure in which cutouts are provided on both left and right sides of a rectangular dielectric material.
A power feeding unit 14 is provided at a position apart from the cut portion of the circularly polarized wave generator 13 by a predetermined distance. The circularly polarized wave generator 13 is arranged at an angle of 45 ° with respect to the power feeding unit 14.
【００１２】上記円偏波発生器１３には、ホーン部１２
側に棒状の支持部２２が設けられ、その先端に筒状誘電
体２３が設けられる。この筒状誘電体２３は、ホーン部
１２の開口部中心付近に位置するように上記支持部２２
を介して円偏波発生器１３に一体に設けられる。The circular polarization generator 13 includes a horn section 12
A rod-shaped support portion 22 is provided on the side, and a cylindrical dielectric 23 is provided at the tip thereof. The cylindrical dielectric 23 is positioned so that it is located near the center of the opening of the horn 12.
Is provided integrally with the circularly polarized wave generator 13 via.
【００１３】すなわち、上記円偏波発生器１３、支持部
２２及び筒状誘電体２３は、図２（ａ）、（ｂ）に示す
ように一体で成型されている。図２の（ａ）は円偏波発
生器１３、支持部２２及び筒状誘電体２３を一体成型し
た状態を示す断面図、（ｂ）は同左側面図である。That is, the circularly polarized wave generator 13, the support 22 and the cylindrical dielectric 23 are integrally molded as shown in FIGS. 2 (a) and 2 (b). 2A is a cross-sectional view showing a state in which the circularly polarized wave generator 13, the support portion 22 and the cylindrical dielectric 23 are integrally molded, and FIG. 2B is a left side view of the same.
【００１４】上記筒状誘電体２３は、ホーンカバー２１
での反射を打ち消すためのもので、入射電波の約１／４
波長に誘電体の波長短縮率を乗じた長さに設定する。上
記の長さを有する筒状誘電体２３を設けることにより、
位相を１８０°進めた反射波を発生させてホーンカバー
２１による反射波を打ち消すことができる。なお、筒状
誘電体２３は、上記したようにホーン部１２の開口部中
心付近に位置するように設けられるが、先端をホーンカ
バー２１の内側面に当接させても良い。The cylindrical dielectric member 23 is a horn cover 21.
It is for canceling the reflection at, and is about 1/4 of the incident radio wave.
It is set to the length obtained by multiplying the wavelength by the wavelength shortening rate of the dielectric. By providing the cylindrical dielectric 23 having the above length,
A reflected wave whose phase is advanced by 180 ° can be generated to cancel the reflected wave by the horn cover 21. The cylindrical dielectric 23 is provided so as to be located near the center of the opening of the horn portion 12 as described above, but the tip may be in contact with the inner side surface of the horn cover 21.
【００１５】上記実施形態で示したように筒状誘電体２
３をホーンカバー２１から独立して設け、円偏波発生器
１３と一体に成型することにより、ホーンカバー２１を
十分な薄さで成型することが可能となり、アンテナの受
信レベルを低下させることなく、ホーン内部での多重反
射を抑え、良好な反射損失特性並びに広周波数帯域に亘
り良好な円偏波軸比特性を得ることができる。また、筒
状誘電体２３を支持部２２を介して円偏波発生器１３と
一体に成型することにより、簡単な構成で筒状誘電体２
３を所定の位置に確実に保持でき、かつ安価に構成する
ことができる。As shown in the above embodiment, the cylindrical dielectric 2
By providing 3 separately from the horn cover 21 and integrally molding it with the circularly polarized wave generator 13, it is possible to mold the horn cover 21 with a sufficiently thin thickness and without lowering the reception level of the antenna. Therefore, it is possible to suppress the multiple reflection inside the horn and to obtain a good reflection loss characteristic and a good circular polarization axis ratio characteristic over a wide frequency band. Further, by molding the cylindrical dielectric 23 integrally with the circularly polarized wave generator 13 via the support portion 22, the cylindrical dielectric 2 can be formed with a simple structure.
3 can be securely held at a predetermined position and can be constructed at low cost.
【００１６】（第２実施形態）次に本発明の第２実施形
態について説明する。図３は、本発明の第２実施形態に
係るパラボラアンテナ用１次放射器２０の構成を示す断
面図である。この第２実施形態は、第１実施形態に示し
た筒状誘電体２３に代えて薄い円形の誘電体板２４を設
けたものである。すなわち、支持部２２の先端に誘電体
板２４を一体に設け、ホーンカバー２１の中央部内側よ
り、入射電波の約１／４波長の距離に配置したものであ
る。その他の構成は、図１に示した第１実施形態と同様
の構成であるので、上記第１実施形態と同一符号を付し
て詳細な説明は省略する。(Second Embodiment) Next, a second embodiment of the present invention will be described. FIG. 3 is a cross-sectional view showing the structure of the parabolic antenna primary radiator 20 according to the second embodiment of the present invention. In the second embodiment, a thin circular dielectric plate 24 is provided in place of the cylindrical dielectric 23 shown in the first embodiment. That is, the dielectric plate 24 is integrally provided at the tip of the support portion 22 and is arranged at a distance of about ¼ wavelength of the incident radio wave from the inside of the central portion of the horn cover 21. Since other configurations are the same as those of the first embodiment shown in FIG. 1, the same reference numerals as those of the first embodiment are given and detailed description thereof is omitted.
【００１７】上記第２実施形態に示したようにホーンカ
バー２１の中央部内側より、入射電波の約１／４波長の
距離に誘電体板２４を配置しても、位相を１８０°進め
た反射波を発生させてホーンカバー２１による反射波を
打ち消すことができる。As shown in the second embodiment, even if the dielectric plate 24 is arranged at a distance of about ¼ wavelength of the incident radio wave from the inside of the central portion of the horn cover 21, the reflection with the phase advanced by 180 ° A wave can be generated to cancel the reflected wave from the horn cover 21.
【００１８】従って、第２実施形態においても、アンテ
ナの受信レベルを低下させることなく、ホーン内部での
多重反射を抑え、良好な反射損失特性並びに広周波数帯
域に亘り良好な円偏波軸比特性を得ることができる。Therefore, also in the second embodiment, multiple reflections inside the horn are suppressed without lowering the reception level of the antenna, and good reflection loss characteristics and good circular polarization axis ratio characteristics over a wide frequency band are provided. Can be obtained.
【００１９】なお、上記第２実施形態では、誘電体板２
４を円形に形成した場合について示したが、その他の形
状、例えば矩形に形成しても同様の効果を得ることがで
きる。In the second embodiment, the dielectric plate 2
Although the case where 4 is formed in a circular shape is shown, the same effect can be obtained by forming the shape in another shape, for example, a rectangular shape.
【００２０】（第３実施形態）次に本発明の第３実施形
態について説明する。図４は、本発明の第３実施形態に
係るパラボラアンテナ用１次放射器２０の構成を示す断
面図である。この第３実施形態は、第１実施形態に示し
た筒状誘電体２３と共に第２実施形態に示した円形また
は矩形の誘電体板２４を設けたものである。すなわち、
ホーンカバー２１の中央部内側に接するように筒状誘電
体２３を設けると共に、ホーンカバー２１の中央部内側
より、入射電波の約１／４波長の距離に誘電体板２４を
配置したものである。上記筒状誘電体２３及び誘電体板
２４は、支持部２２を介して円偏波発生器１３に一体成
型される。上記筒状誘電体２３は、入射電波の約１／４
波長に誘電体の波長短縮率を乗じた長さに設定する。ま
た、誘電体板２４は、ホーンカバー２１の中央部内側よ
り、入射電波の約１／４波長の奇数倍の距離に配置す
る。その他の構成は、図１に示した第１実施形態と同様
の構成であるので、上記第１実施形態と同一符号を付し
て詳細な説明は省略する。(Third Embodiment) Next, a third embodiment of the present invention will be described. FIG. 4 is a cross-sectional view showing the structure of the parabolic antenna primary radiator 20 according to the third embodiment of the present invention. The third embodiment is provided with the cylindrical dielectric 23 shown in the first embodiment and the circular or rectangular dielectric plate 24 shown in the second embodiment. That is,
The cylindrical dielectric 23 is provided so as to contact the inside of the central portion of the horn cover 21, and the dielectric plate 24 is arranged at a distance of about ¼ wavelength of the incident radio wave from the inside of the central portion of the horn cover 21. . The cylindrical dielectric 23 and the dielectric plate 24 are integrally molded with the circularly polarized wave generator 13 via the support portion 22. The cylindrical dielectric 23 has about 1/4 of the incident radio wave.
It is set to the length obtained by multiplying the wavelength by the wavelength shortening rate of the dielectric. Further, the dielectric plate 24 is arranged at a distance from the inner side of the central portion of the horn cover 21 to an odd multiple of about ¼ wavelength of the incident radio wave. Since other configurations are the same as those of the first embodiment shown in FIG. 1, the same reference numerals as those of the first embodiment are given and detailed description thereof is omitted.
【００２１】上記のように筒状誘電体２３及び誘電体板
２４をホーンカバー２１から独立して設けることによっ
て、ホーンカバー２１による反射波をより効果的に打ち
消すことができ、アンテナの受信レベルを低下させるこ
となく、ホーン内部での多重反射を抑え、良好な反射損
失特性並びに広周波数帯域に亘り良好な円偏波軸比特性
を得ることができる。By providing the cylindrical dielectric 23 and the dielectric plate 24 independently of the horn cover 21 as described above, the reflected wave from the horn cover 21 can be canceled more effectively and the reception level of the antenna can be improved. Multiple reflections inside the horn can be suppressed without lowering, and good reflection loss characteristics and good circular polarization axis ratio characteristics over a wide frequency band can be obtained.
【００２２】（第４実施形態）次に本発明の第４実施形
態について説明する。図５は、本発明の第４実施形態に
係る衛星放送受信用コンバータの構成を示す側面図であ
る。この第４実施形態は、第１ないし第３実施形態に示
したパラボラアンテナ用１次放射器２０を用いて衛星放
送受信用コンバータ３０を構成した場合について示した
ものである。衛星放送受信用コンバータ３０は、パラボ
ラアンテナ用１次放射器２０とコンバータ部３１を一体
に構成したもので、コンバータ部３１はコンバータ出力
端子３２を備えている。(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described. FIG. 5 is a side view showing the configuration of the satellite broadcast receiving converter according to the fourth embodiment of the present invention. The fourth embodiment shows a case where a satellite broadcast receiving converter 30 is configured by using the parabolic antenna primary radiator 20 shown in the first to third embodiments. The satellite broadcast receiving converter 30 is configured by integrally forming the parabolic antenna primary radiator 20 and a converter unit 31, and the converter unit 31 includes a converter output terminal 32.
【００２３】上記パラボラアンテナ用１次放射器２０
は、衛星から送られてくる円偏波の放送信号をパラボラ
反射鏡を介して受信し、直線偏波の信号に変換してコン
バータ部３１に出力する。コンバータ部３１は、図示し
ないが例えばＳＨＦアンプ回路、ミキサー回路、局部発
振器、ＩＦアンプ回路等からなり、パラボラアンテナ用
１次放射器２０で受信した信号をＳＨＦアンプ回路で増
幅した後、ミキサー回路及び局部発振器からなる周波数
変換回路により中間周波信号に変換し、更にＩＦアンプ
回路で増幅してコンバータ出力端子３２から同軸ケーブ
ルによりテレビ受信機へ出力する。Primary radiator 20 for the parabolic antenna
Receives a circularly polarized broadcast signal sent from a satellite via a parabolic reflector, converts it into a linearly polarized signal, and outputs it to the converter unit 31. Although not shown, the converter unit 31 includes, for example, an SHF amplifier circuit, a mixer circuit, a local oscillator, an IF amplifier circuit, etc., and amplifies the signal received by the parabolic antenna primary radiator 20 with the SHF amplifier circuit, and then a mixer circuit and The signal is converted into an intermediate frequency signal by a frequency conversion circuit including a local oscillator, further amplified by an IF amplifier circuit, and output from the converter output terminal 32 to the television receiver by a coaxial cable.
【００２４】上記したように第１ないし第３実施形態に
示したパラボラアンテナ用１次放射器２０を用いること
により、良好な反射損失特性並びに広周波数帯域に亘っ
て良好な円偏波軸比特性を持つ衛星放送受信用コンバー
タ３０を構成することができる。As described above, by using the primary radiator 20 for the parabolic antenna shown in the first to third embodiments, good reflection loss characteristics and good circular polarization axis ratio characteristics over a wide frequency band are obtained. It is possible to configure the satellite broadcast receiving converter 30 having the above.
【００２５】[0025]
【発明の効果】以上詳記したように本発明によれば、パ
ラボラアンテナ用１次放射器において、ホーンカバーか
ら独立して筒状誘電体、誘電体板を設け、円偏波発生器
と一体に成型してホーン部の開口部中心付近に配置する
ことにより、ホーンカバーを十分な薄さで成型すること
が可能となり、アンテナの受信レベルを低下させること
なく、ホーン内部での多重反射を抑え、良好な反射損失
特性並びに広周波数帯域に亘り良好な円偏波軸比特性を
得ることができる。また、上記パラボラアンテナ用１次
放射器をコンバータ部と一体に設けることにより、良好
な電気特性を有する衛星放送受信用コンバータを構成す
ることができる。As described above in detail, according to the present invention, in the primary radiator for the parabolic antenna, the cylindrical dielectric and the dielectric plate are provided independently of the horn cover and integrated with the circular polarization generator. It is possible to mold the horn cover with a sufficient thinness by placing it in the vicinity of the center of the opening of the horn and suppressing multiple reflections inside the horn without lowering the reception level of the antenna. It is possible to obtain good reflection loss characteristics and good circular polarization axis ratio characteristics over a wide frequency band. Further, by providing the parabolic antenna primary radiator integrally with the converter section, it is possible to configure a satellite broadcast receiving converter having good electric characteristics.
【図１】本発明の第１実施形態に係るパラボラアンテナ
用１次放射器の構成を示す断面図。FIG. 1 is a sectional view showing a configuration of a primary radiator for a parabolic antenna according to a first embodiment of the present invention.
【図２】（ａ）は同実施形態における筒状誘電体を円偏
波発生器とを一体成型した状態を示す断面図、（ｂ）は
同左側面図。FIG. 2A is a cross-sectional view showing a state in which the cylindrical dielectric in the same embodiment is integrally molded with a circular polarization generator, and FIG. 2B is a left side view of the same.
【図３】本発明の第２実施形態に係るパラボラアンテナ
用１次放射器の構成を示す断面図。FIG. 3 is a sectional view showing the configuration of a primary radiator for a parabolic antenna according to a second embodiment of the present invention.
【図４】本発明の第３実施形態に係るパラボラアンテナ
用１次放射器の構成を示す断面図。FIG. 4 is a sectional view showing a configuration of a primary radiator for a parabolic antenna according to a third embodiment of the present invention.
【図５】本発明の第４実施形態に係る衛星放送受信用コ
ンバータの構成を示す側面図。FIG. 5 is a side view showing a configuration of a satellite broadcast receiving converter according to a fourth embodiment of the present invention.
【図６】従来のパラボラアンテナ用１次放射器の構成を
示す断面図。FIG. 6 is a sectional view showing the structure of a conventional primary radiator for a parabolic antenna.
１１ ケース本体１２ ホーン部１３ 円偏波発生器１４ 給電部２０ パラボラアンテナ用１次放射器２１ ホーンカバー２２ 支持部２３ 筒状誘電体２４ 誘電体板３０ 衛星放送受信用コンバータ３１ コンバータ部３２ コンバータ出力端子11 Case body12 Horn part13 circular polarization generator14 power supply20 Primary radiator for parabolic antenna21 horn cover22 Support23 Cylindrical dielectric24 Dielectric plate30 Satellite Broadcasting Converter31 Converter section32 converter output terminal
─────────────────────────────────────────────────────フロントページの続き (56)参考文献 特開 平８−307102（ＪＰ，Ａ) 特開 平11−97924（ＪＰ，Ａ) 特開 平５−235603（ＪＰ，Ａ) 実公 平５−43525（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) H01Q 13/02 H01P 1/17 H01Q 19/10 H01Q 23/00─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-307102 (JP, A) JP-A-11-97924 (JP, A) JP-A-5-235603 (JP, A) Fukui Kohei 5- 43525 (JP, Y2) (58) Fields investigated (Int.Cl.7 , DB name) H01Q 13/02 H01P 1/17 H01Q 19/10 H01Q 23/00
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001193414AJP3472567B2 (en) | 2001-06-26 | 2001-06-26 | Primary radiator for satellite dish and converter for satellite broadcasting reception |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001193414AJP3472567B2 (en) | 2001-06-26 | 2001-06-26 | Primary radiator for satellite dish and converter for satellite broadcasting reception |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003194378ADivisionJP4047775B2 (en) | 2003-07-09 | 2003-07-09 | Circular polarization generator |
| Publication Number | Publication Date |
|---|---|
| JP2003008336A JP2003008336A (en) | 2003-01-10 |
| JP3472567B2true JP3472567B2 (en) | 2003-12-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001193414AExpired - Fee RelatedJP3472567B2 (en) | 2001-06-26 | 2001-06-26 | Primary radiator for satellite dish and converter for satellite broadcasting reception |
| Country | Link |
|---|---|
| JP (1) | JP3472567B2 (en) |
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