JP3266466B2 - Helical antenna - Google Patents
Helical antennaInfo
- Publication number
- JP3266466B2 JP3266466B2 JP19049695A JP19049695A JP3266466B2 JP 3266466 B2 JP3266466 B2 JP 3266466B2 JP 19049695 A JP19049695 A JP 19049695A JP 19049695 A JP19049695 A JP 19049695A JP 3266466 B2 JP3266466 B2 JP 3266466B2
- Authority
- JP
- Japan
- Prior art keywords
- coaxial line
- conductor
- antenna
- line
- helical antenna
- 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 - Fee Related
Links
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、移動体衛星通信に
適する円偏波を有する4線分数巻きヘリカルアンテナに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-segment helical antenna having circular polarization suitable for mobile satellite communications.
【0002】[0002]
【従来の技術およびその課題】近年、衛星を用いた新規
な移動体通信方式が提案されているが、この実現には自
動車や携帯機に設置する移動局用アンテナの小型化およ
び経済化が重要な課題である。2. Description of the Related Art In recent years, a new mobile communication system using a satellite has been proposed. To achieve this, it is important to reduce the size and economy of mobile station antennas installed in automobiles and portable devices. Is an important task.
【0003】そのため、移動局用アンテナの衛星追尾機
構を簡略化して、小型化および経済化を達成しようとす
る提案がされている。衛星追尾機構を簡略化するアンテ
ナとして、天頂軸に対して対称な指向性を有する円偏波
円錐ビームを放射し、放射方向を衛星の仰角方向に設定
するものがある。[0003] Therefore, there have been proposals for simplifying a satellite tracking mechanism of a mobile station antenna to achieve miniaturization and economy. As an antenna that simplifies the satellite tracking mechanism, there is an antenna that emits a circularly polarized conical beam having a symmetric directivity with respect to the zenith axis and sets the radiation direction to the elevation angle of the satellite.
【0004】このようなアンテナの例としては、4本の
導線を螺旋状に1回転以内で巻き、これに定在波を乗せ
て、給電点側に電波を放射するようにした、いわゆる、
バックファイア型のヘリカルアンテナ(以下ヘリカルア
ンテナと呼ぶ)は、米国のMicrowave Helix Design /
著者 C.C Kilus/(1970年)により公知である。
しかしながら、従来の円偏波円錐ビームを実現するヘリ
カルアンテナは、給電構造が複雑であった。[0004] As an example of such an antenna, a so-called so-called "wire" in which four conductive wires are spirally wound within one rotation and a standing wave is put on the wire to radiate a radio wave to a feeding point side.
Backfire type helical antenna (hereinafter referred to as helical antenna) is a US-based Microwave Helix Design /
Known by the author CC Kilus / (1970).
However, a conventional helical antenna that realizes a circularly polarized conical beam has a complicated feeding structure.
【0005】本発明はこのような従来の課題を解決する
ため、円偏波用アンテナであるヘリカルアンテナを適切
に構成することにより、構成の簡易化が可能な4線分数
巻きヘリカルアンテナを提供することを目的としてい
る。In order to solve the conventional problems, the present invention provides a four-segment helical antenna whose configuration can be simplified by appropriately configuring a helical antenna that is a circularly polarized antenna. It is intended to be.
【0006】[0006]
【課題を解決するための手段】本発明によれば、上述の
目的は特許請求の範囲に記載された発明により達成され
る。すなわち、本発明は、導体線から成る2組の放射素
子を交互に配し、同一ピッチ角かつ同一方向に螺旋状に
して、両放射素子に並列給電を行う4線分数巻き形式の
ヘリカルアンテナにおいて、1組の放射素子が第1の同
軸線と第1の導線からなり、他の1組の放射素子が第2
の同軸線と第2の導線からなり、アンテナ一端におい
て、第1の同軸線の中心導体と第1の導線とを高周波的
に結合し且つ第1の同軸線の外部導体を開放状態にして
第1の給電点を配置し、これに交差させて第2の同軸線
の中心導体と第2の導線とを高周波的に結合し且つ第2
の同軸線の外部導体を開放状態にして第2の給電点を配
置し、アンテナ他端において、第3の同軸線を設け、第
1の同軸線の中心導体と第2の同軸線の中心導体と第3
の同軸線の中心導体とを高周波的に結合し、また、第1
の導線と第2の導線と第1の同軸線の外部導体と第2の
同軸線の外部導体と第3の同軸線の外部導体とを高周波
的に結合し、第3の同軸線に端子を設け送受信信号を取
り出すようにしたものである。According to the present invention, the above objects are achieved by the invention as set forth in the appended claims. That is, the present invention relates to a four-segment helical antenna in which two sets of radiating elements composed of conductor wires are alternately arranged, spirally formed at the same pitch angle and in the same direction, and fed in parallel to both radiating elements. One set of radiating elements consists of a first coaxial line and a first conductor, and the other set of radiating elements is a second
At the one end of the antenna, the center conductor of the first coaxial line and the first conductor are coupled at a high frequency, and the outer conductor of the first coaxial line is opened to open the first coaxial line. A first power supply point is disposed, and crosses the power supply point to couple the center conductor of the second coaxial line and the second conductor at high frequency and to provide a second power supply point.
The second feed point is arranged with the outer conductor of the coaxial line of the antenna open, the third coaxial line is provided at the other end of the antenna, and the center conductor of the first coaxial line and the center conductor of the second coaxial line are provided. And the third
High frequency coupling with the center conductor of the
The second conductor, the second conductor, the outer conductor of the first coaxial line, the outer conductor of the second coaxial line, and the outer conductor of the third coaxial line are coupled at a high frequency, and a terminal is connected to the third coaxial line. The transmission and reception signals are extracted.
【0007】すなわち、本発明は、導体線から成る2組
の放射素子を交互に配し、同一ピッチ角かつ同一方向に
螺旋状にして、両放射素子に並列給電を行う4線分数巻
き形式のヘリカルアンテナにおいて、図1に一例を示す
ようにアンテナ先端に第1の給電点51と、第2の給電
点52を持つとともに他端に第3の同軸線2による送受
信信号取り出し端子61をもち、アンテナ放射部の2対
の導体線の内の各々一方の導体線は第1の同軸線31
と、第2の同軸線32よりなり、他の導体線は第1の導
線41と、第2の導線42よりなり、第1の給電点51
において第1の同軸線31よりなる導体線の中心導体と
第1の導線41は高周波的に結合(導体線の外部導体は
給電点51において開放状態)されており、他端におい
て上記第1の導線41と第1の同軸線31の外部導体が
高周波的に結合され、同様に第2の給電点52において
第2の同軸線32よりなる導体線の中心導体と第2の導
線42は高周波的に結合(導体線の外部導体は給電点5
2において開放状態)されており、他端において上記第
2の導線42と第2の同軸線32の外部導体が高周波的
に結合され、さらに同軸線31と同軸線32のそれぞれ
の内部導体同士、外部導体同士を高周波的に結合してい
るものである。That is, the present invention provides a four-wire fractional-winding type in which two sets of radiating elements composed of conductor wires are alternately arranged, spirally formed at the same pitch angle and in the same direction, and fed in parallel to both radiating elements. The helical antenna has a first feeding point 51 and a second feeding point 52 at the tip of the antenna as shown in an example in FIG. 1 and has a transmitting / receiving signal extracting terminal 61 by the third coaxial line 2 at the other end. One of the two pairs of conductor lines of the antenna radiating portion is a first coaxial line 31.
And a second coaxial line 32, and the other conductor line is formed of a first conductor 41 and a second conductor 42, and a first power supply point 51
, The center conductor of the conductor wire composed of the first coaxial line 31 and the first conductor 41 are coupled at a high frequency (the outer conductor of the conductor wire is open at the feeding point 51), and the other end of the first conductor is connected to the first conductor. The conductor 41 and the outer conductor of the first coaxial line 31 are coupled at a high frequency. Similarly, at the second feed point 52, the center conductor of the conductor composed of the second coaxial line 32 and the second conductor 42 are connected at a high frequency. (The outer conductor of the conductor wire is 5
2, the second conductor 42 and the outer conductor of the second coaxial line 32 are coupled at a high frequency at the other end, and the inner conductors of the coaxial line 31 and the coaxial line 32 are The outer conductors are connected at high frequencies.
【0008】[0008]
【発明の実施の形態】本発明の構成を図1に示す。ヘリ
カルアンテナにおいては適切な寸法形状を選択すること
により円偏波を得ることができる。このとき、円偏波円
錐ビームを発生させるためのパラメータとしては、絶縁
体円筒(例えば、ガラス繊維強化ポリエステル製)の支
持体1の直径、ピッチ、巻き付け角度等の形状パラメー
タが支配的である。FIG. 1 shows the configuration of the present invention. In a helical antenna, circular polarization can be obtained by selecting an appropriate size and shape. At this time, as parameters for generating the circularly polarized conical beam, shape parameters such as a diameter, a pitch, and a winding angle of the support 1 of the insulating cylinder (for example, made of glass fiber reinforced polyester) are dominant.
【0009】本発明においては図1に示すように2組の
導体線の一方を第1の同軸線31と第2の同軸線32で
構成し、他の導体線を第1の導線41と第2の導線42
で構成し、第1の同軸線31と第2の同軸線32と対称
な構造とし、第1の給電点51と第2の給電点52で交
差させることにより、第3の同軸線2から供給される高
周波電流で第3の同軸線2の中心導体を流れてきた高周
波電流はヘリカルの巻き終わり点、すなわち、送受信信
号取り出し端子61で第1の同軸線31と第2の同軸線
32の2方向に分岐し、第1の給電点51と第2の給電
点52においてそのままもう一方の第1の導線41と第
2の導線42に流れ、第1の同軸線31と第2の同軸線
32の外部導体の内側を流れてきた大きさの等しい逆方
向の高周波電流は第1の同軸線31と第2の同軸線32
の外部導体の外側を流れる。このとき、送受信信号取り
出し端子61において両方の第1の導線41と第2の導
線42を第3の同軸線2の外部導体4に高周波的に結合
すれば、それぞれの高周波電流は大きさが等しく逆方向
なので、それ以降は導体上を流れることなく終端される
から、高周波電流は見かけ上必要な放射部のみを流れる
ことになる。In the present invention, as shown in FIG. 1, one of the two sets of conductors is composed of a first coaxial line 31 and a second coaxial line 32, and the other conductor is composed of a first conductor 41 and a first coaxial line. 2 conductor 42
The first coaxial line 31 and the second coaxial line 32 have a symmetrical structure, and the first coaxial line 31 and the second coaxial line 32 intersect at the first power supply point 51 and the second power supply point 52, so that the power is supplied from the third coaxial line 2. The high-frequency current that has flowed through the center conductor of the third coaxial line 2 with the high-frequency current to be transmitted ends at the helical winding end point, that is, at the transmission / reception signal extraction terminal 61, where the first coaxial line 31 and the second coaxial line 32 The first coaxial cable 31 and the second coaxial cable 32 flow in the other direction at the first power supply point 51 and the second power supply point 52 as they are. The high-frequency currents having the same magnitude and flowing in opposite directions flowing inside the outer conductor of the first coaxial line 31 and the second coaxial line 32
Flows outside of the outer conductor. At this time, if both the first conductor 41 and the second conductor 42 are coupled to the outer conductor 4 of the third coaxial cable 2 at the transmission / reception signal extraction terminal 61 at high frequencies, the respective high-frequency currents have the same magnitude. Since it is in the opposite direction, it is terminated without flowing on the conductor thereafter, so that the high-frequency current apparently flows only in the necessary radiating portion.
【0010】以上の実施形態により、図2に一例を示す
放射指向性の円偏波円錐ビームが得られる。According to the above embodiment, a circularly-polarized conical beam having radiation directivity, an example of which is shown in FIG. 2, is obtained.
【0011】このように、放射素子となる第1の同軸線
31の中心導体は給電点51で、放射素子となる第1の
導線41と高周波的に結合される。同様に放射素子とな
る第2の同軸線32は、第2の給電点52で、放射素子
となる第2の導線42と高周波的に結合される。そし
て、第1の同軸線31、第2の同軸線32と第1の導線
41、第2の導線42の4本の放射素子(2組の放射素
子)は第1の給電点51と第2の給電点52で交差す
る。As described above, the center conductor of the first coaxial cable 31 serving as a radiating element is coupled to the first conducting wire 41 serving as a radiating element at a high frequency at the feeding point 51. Similarly, the second coaxial line 32 serving as a radiating element is coupled at a second feeding point 52 to the second conductor 42 serving as a radiating element at a high frequency. The four radiating elements (two sets of radiating elements) of the first coaxial line 31, the second coaxial line 32, the first conducting wire 41, and the second conducting wire 42 are connected to the first feeding point 51 and the second feeding point 51. Intersect at the feeding point 52.
【0012】ここでは、円筒状の支持体1に巻かれた4
線分数巻きヘリカルアンテナについて述べたが、多角
柱、多角錐に巻かれたもの、支持体がないもの(第1の
同軸線31、第2の同軸線32と第1の導線41、第2
の導線42に剛性ある、例えばセミリジット導体線材料
等をもちいた場合)についてもについても同様なことが
いえることは言うまでもない。[0012] Here, 4 is wound around a cylindrical support 1.
Although the description has been given of the helical antenna having a number of line segments, a polygonal pillar, a polygonal pyramid, and a body without a support (the first coaxial line 31, the second coaxial line 32 and the first conductive wire 41, the second
It is needless to say that the same can be said for the case where the conductive wire 42 is rigid (for example, when a semi-rigid conductor wire material is used).
【0013】[0013]
【発明の効果】以上説明したように本発明の構成ならび
に方法によれば、円偏波用4線分数巻きヘリカルアンテ
ナを同軸線31、32と導線41、42を用いて適切に
構成することにより、簡易な給電系を実現できる利点が
ある。As described above, according to the configuration and method of the present invention, a four-segment circularly wound helical antenna for circular polarization can be appropriately configured using the coaxial wires 31 and 32 and the conductors 41 and 42. There is an advantage that a simple power supply system can be realized.
【図1】本発明の実施形態を示すヘリカルアンテナの
図。FIG. 1 is a diagram of a helical antenna showing an embodiment of the present invention.
【図2】本発明の実施形態に基づいたアンテナ軸を含む
面での放射指向性の実測値を示す図。FIG. 2 is a diagram showing actually measured values of radiation directivity on a plane including an antenna axis according to an embodiment of the present invention.
1:支持体 2:第3の同軸線 3:第3の同軸線
の中心導体 4:第3の同軸線の外部導体 5:第3の同軸線
の絶縁体 31:放射素子となる第1の同軸線 32:放射素子と
なる第2の同軸線 41:放射素子となる第1の導線 42:放射素子と
なる第2の導線 51:第1の給電点 52:第2の給電
点 61:送受信信号取り出し端子1: Supporting body 2: Third coaxial line 3: Central conductor of third coaxial line 4: Outer conductor of third coaxial line 5: Insulator of third coaxial line 31: First radiating element Coaxial line 32: second coaxial line serving as a radiating element 41: first conductive line serving as a radiating element 42: second conductive line serving as a radiating element 51: first feeding point 52: second feeding point 61: transmission / reception Signal extraction terminal
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平3−274904(JP,A) 特開 平4−134906(JP,A) 特開 平3−74906(JP,A) 特開 平6−326511(JP,A) 米国特許4608574(US,A) 寺田矩芳、鹿子嶋憲一,移動体衛星通 信用円錐ビーム2線巻きヘリカルアンテ ナ,電子情報通信学会技術研究報告,日 本,社団法人 電子情報通信学会,1991 年7月9日,p.21 (58)調査した分野(Int.Cl.7,DB名) H01Q 11/08 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-274904 (JP, A) JP-A-4-134906 (JP, A) JP-A-3-74906 (JP, A) JP-A-6-1994 326511 (JP, A) US Patent 4,608,574 (US, A) Noriyoshi Terada, Kenichi Kagoshima, Mobile Satellite Communication Conical Beam 2-Wound Helical Antenna, IEICE Technical Report, Japan, Japan Electronics Information and Communication Society, July 9, 1991, p. 21 (58) Field surveyed (Int.Cl. 7 , DB name) H01Q 11/08
Claims (1)
し、同一ピッチ角かつ同一方向に螺旋状にして、両放射
素子に並列給電を行う4線分数巻き形式のヘリカルアン
テナにおいて、 1組の放射素子が第1の同軸線と第1の導線からなり、 他の1組の放射素子が第2の同軸線と第2の導線からな
り、 アンテナ一端において、第1の同軸線の中心導体と第1
の導線とを高周波的に結合し且つ第1の同軸線の外部導
体を開放状態にして第1の給電点を配置し、これに交差
させて第2の同軸線の中心導体と第2の導線とを高周波
的に結合し且つ第2の同軸線の外部導体を開放状態にし
て第2の給電点を配置し、 アンテナ他端において、第3の同軸線を設け、第1の同
軸線の中心導体と第2の同軸線の中心導体と第3の同軸
線の中心導体とを高周波的に結合し、また、第1の導線
と第2の導線と第1の同軸線の外部導体と第2の同軸線
の外部導体と第3の同軸線の外部導体とを高周波的に結
合し、 第3の同軸線に端子を設け送受信信号を取り出すことを
特徴とするヘリカルアンテナ。1. A four-segment helical antenna in which two sets of radiating elements composed of conductor wires are alternately arranged and spirally formed at the same pitch angle and in the same direction to feed power in parallel to both radiating elements. One set of radiating elements comprises a first coaxial line and a first conductive line, and another set of radiating elements comprises a second coaxial line and a second conductive line. Center conductor and first
And a first feeding point is arranged with the outer conductor of the first coaxial line in an open state, and intersects with the first feeding point and the center conductor of the second coaxial line and the second conducting wire. And a second feed point is arranged with the outer conductor of the second coaxial line open, and a third coaxial line is provided at the other end of the antenna, and the center of the first coaxial line is provided. The conductor, the center conductor of the second coaxial line, and the center conductor of the third coaxial line are coupled at a high frequency, and the first conductor, the second conductor, the outer conductor of the first coaxial line, and the second conductor are connected to each other. A helical antenna, characterized in that the outer conductor of the coaxial line and the outer conductor of the third coaxial line are coupled at a high frequency, and a terminal is provided on the third coaxial line to extract a transmission / reception signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19049695A JP3266466B2 (en) | 1995-07-26 | 1995-07-26 | Helical antenna |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19049695A JP3266466B2 (en) | 1995-07-26 | 1995-07-26 | Helical antenna |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0946124A JPH0946124A (en) | 1997-02-14 |
JP3266466B2 true JP3266466B2 (en) | 2002-03-18 |
Family
ID=16259065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19049695A Expired - Fee Related JP3266466B2 (en) | 1995-07-26 | 1995-07-26 | Helical antenna |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3266466B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9603914D0 (en) * | 1996-02-23 | 1996-04-24 | Symmetricom Inc | An antenna |
-
1995
- 1995-07-26 JP JP19049695A patent/JP3266466B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
寺田矩芳、鹿子嶋憲一,移動体衛星通信用円錐ビーム2線巻きヘリカルアンテナ,電子情報通信学会技術研究報告,日本,社団法人 電子情報通信学会,1991年7月9日,p.21 |
Also Published As
Publication number | Publication date |
---|---|
JPH0946124A (en) | 1997-02-14 |
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