JPH0669716A - Wide band-two dipole antenna - Google Patents
Wide band-two dipole antennaInfo
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- JPH0669716A JPH0669716A JP21905892A JP21905892A JPH0669716A JP H0669716 A JPH0669716 A JP H0669716A JP 21905892 A JP21905892 A JP 21905892A JP 21905892 A JP21905892 A JP 21905892A JP H0669716 A JPH0669716 A JP H0669716A
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車電話等に使用さ
れる陸上移動通信の基地局用アンテナとして、特に水平
面の指向特性を改善した反射板付きの広帯域２ダイポー
ルアンテナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wideband two-dipole antenna with a reflector having improved directional characteristics in a horizontal plane, as an antenna for a base station for land mobile communications used in automobile phones and the like.
【０００２】[0002]
【従来の技術】従来、自動車電話等の陸上移動通信には
８００ＭＨｚ帯の周波数が用いられ、オムニゾーンや３
セクタゾーン、又は６セクタゾーン構成が使用されてい
る。しかし、近年の陸上移動通信、特に自動車電話の発
展はめざましく、大都市においては現システムでは移動
局の増加に対応できなくなることが予想され、新しい周
波数帯でディジタル方式の自動車電話が検討されてい
る。2. Description of the Related Art Conventionally, a frequency of 800 MHz band has been used for land mobile communication such as car telephone, and it has been used in omni-zone and 3
Sector zones, or 6 sector zone configurations are used. However, the development of land mobile communications, especially car phones, has been remarkable in recent years, and it is expected that the present system will not be able to cope with the increase in mobile stations in large cities, and digital car phones are being considered in new frequency bands. .
【０００３】このディジタル方式は、現行の８６０ＭＨ
ｚ〜９４０ＭＨｚ帯の周波数帯に代わり、８１０ＭＨｚ
〜９６０ＭＨｚ帯の周波数帯が使用される。従来９％の
比帯域が１７％の比帯域と広帯域になるため、アンテナ
の電圧定在波比特性，利得特性，水平面指向特性とも広
帯域にする必要がある。This digital system is based on the current 860MH.
810MHz instead of the frequency band from z to 940MHz
Frequency bands in the ~ 960 MHz band are used. Since the conventional 9% bandwidth becomes a wide bandwidth of 17%, it is necessary to make the antenna's voltage standing wave ratio characteristic, gain characteristic, and horizontal plane directivity characteristic wide.
【０００４】前記６セクタゾーン構成では、基地局用に
は垂直偏波で水平面指向特性６０°ビームのアンテナが
使用される。６０°ビームを得る放射素子としては、図
７に示すようなコーナ反射板付ダイポールアンテナ１
や、図８に示すようなダイポール素子を水平面内でスタ
ックし、これに反射板を取り付けた２ダイポールアンテ
ナ２等が考えられる。他方、鉄塔やビル屋上等基地局ア
ンテナの取付場所を考慮すると、小型，軽量で受風面積
の小さなアンテナが望まれる。In the 6-sector zone structure, an antenna having a vertical polarization and a horizontal plane directional characteristic of 60 ° is used for a base station. As a radiating element for obtaining a 60 ° beam, a dipole antenna with a corner reflector 1 as shown in FIG. 7 is used.
Alternatively, a 2-dipole antenna 2 or the like in which dipole elements as shown in FIG. 8 are stacked in a horizontal plane and a reflector is attached thereto can be considered. On the other hand, considering the installation location of the base station antenna such as a steel tower or the rooftop of a building, an antenna that is small and lightweight and has a small wind receiving area is desired.
【０００５】図７のコーナ反射板付ダイポールアンテナ
１は、ダイポール素子３と、所定角度で折り曲げられた
平面反射板４とから成り（図中、５は給電コネクタ）、
その反射板４の最大開口幅は約１．３波長（ここで、波
長は使用される周波数の波長をいう）である。図８の２
ダイポールアンテナ２は、２組のダイポール素子６，６
と平面状の反射板７とから成り、その反射板７の幅は約
０．８波長で、前記コーナ反射板付ダイポールアンテナ
１と比較して、最大幅で約４０％小型となる。そのた
め、小型，軽量，受風面積の面から２ダイポールアンテ
ナ２が有利である。The dipole antenna 1 with a corner reflector shown in FIG. 7 comprises a dipole element 3 and a flat reflector 4 bent at a predetermined angle (in the figure, 5 is a power feeding connector).
The maximum aperture width of the reflection plate 4 is about 1.3 wavelengths (here, the wavelength refers to the wavelength of the frequency used). 2 of FIG.
The dipole antenna 2 includes two sets of dipole elements 6 and 6.
The reflector 7 has a width of about 0.8 wavelength, which is about 40% smaller in maximum width than the dipole antenna 1 with a corner reflector. Therefore, the two-dipole antenna 2 is advantageous in terms of small size, light weight, and wind receiving area.
【０００６】前記２ダイポールアンテナ２は、詳しくは
図８に示すように、２組の約０．６波長離れたダイポー
ル素子６，６，給電バラン８，ダイポール素子６，６の
支持絶縁体９，給電線路１０，約０．８波長幅の反射板
７及び給電コネクタ５により構成される。所定の水平面
指向性は、２ダイポール素子６，６の間隔と反射板７の
横幅、ダイポール素子６，６と反射板７との距離により
決定される。一例として、図９に２ダイポールアンテナ
２の水平面指向性、図１０にその水平面半値幅特性、図
１１にその利得特性を示す。The two dipole antennas 2 are, as shown in detail in FIG. 8, two sets of dipole elements 6 and 6, which are separated by about 0.6 wavelengths, a feed balun 8, support insulators 9 for the dipole elements 6 and 6. The feeder line 10, the reflector 7 having a width of about 0.8 wavelength, and the feeder connector 5 are included. The predetermined horizontal plane directivity is determined by the distance between the two dipole elements 6 and 6, the lateral width of the reflector 7, and the distance between the dipole elements 6 and 6 and the reflector 7. As an example, FIG. 9 shows the horizontal plane directivity of the two-dipole antenna 2, FIG. 10 shows the horizontal half-width characteristic, and FIG. 11 shows the gain characteristic.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、図９，
図１０，図１１に示すように、前記２ダイポールアンテ
ナ２は、周波数に対する水平面指向性の半値幅及び利得
の変動（周波数特性）が大きく、８１０ＭＨｚ〜９６０
ＭＨｚ帯では、特に水平面半値幅が４０°〜６５°にも
なり、セクタゾーンを十分構成できないという問題点が
あった。However, as shown in FIG.
As shown in FIGS. 10 and 11, the two-dipole antenna 2 has large fluctuations in the half-width of the horizontal plane directivity and the gain (frequency characteristics) with respect to the frequency, and is 810 MHz to 960.
In the MHz band, the half-width of the horizontal plane is as large as 40 ° to 65 °, and there is a problem that the sector zone cannot be sufficiently constructed.
【０００８】本発明はかかる点に鑑みなされたもので、
その目的は前記問題点を解消し、セクタゾーンについ
て、周波数に対する水平面指向性半値幅と利得の変動の
小さい均一したビームが得られる広帯域２ダイポールア
ンテナを提供することにある。The present invention has been made in view of the above points,
An object of the present invention is to solve the above-mentioned problems and to provide a wideband two-dipole antenna which can obtain a uniform beam with a small horizontal plane directivity half value width and a small gain variation with respect to a sector zone.
【０００９】[0009]
【課題を解決するための手段】前記目的を達成するため
の本発明の構成は、互いに左右に、かつ平行に並べられ
た２組のダイポール素子と、該ダイポール素子より約
０．２波長離れた位置に配設された反射板とから成る２
ダイポールアンテナにおいて、次のとおりである。The structure of the present invention for attaining the above-mentioned object is such that two sets of dipole elements arranged side by side and in parallel with each other and a distance of about 0.2 wavelength from the dipole elements. 2 consisting of a reflector arranged at a position
In the dipole antenna, it is as follows.
【００１０】（１） 前記２組のダイポール素子の間
に、該ダイポール素子に平行して、２組の無給電素子を
互いに対称的に配設したことを特徴とする。(1) Between the two sets of dipole elements, two sets of parasitic elements are arranged symmetrically with each other in parallel to the dipole elements.
【００１１】（２） 前記（１）において、前記２組の
無給電素子は、互いに内側は短く、外側は長い台形状の
金属板から成ることを特徴とする。(2) In the above (1), the two sets of parasitic elements are formed of trapezoidal metal plates having a short inner side and a long outer side.
【００１２】[0012]
【作 用】本発明は以上のように構成されているので、
低域周波数においては、電流が主として前記ダイポール
素子上にのみ分布するのに対し、高域周波数において
は、電流が前記ダイポール素子のほか前記無給電素子上
にも分布するようになる。[Operation] Since the present invention is configured as described above,
At low frequencies, the current is mainly distributed only on the dipole element, whereas at high frequencies, the current is distributed on the parasitic element as well as the dipole element.
【００１３】このため、本発明の広帯域２ダイポールア
ンテナは、水平面指向性半値幅の周波数特性を改善で
き、セクタゾーン内に広い周波数帯域にわたって均一し
たビームが得られる。Therefore, the wideband two-dipole antenna of the present invention can improve the frequency characteristic of the horizontal plane half-width and can obtain a uniform beam over a wide frequency band within the sector zone.
【００１４】[0014]
【実施例】以下、図面に基づいて本発明の好適な実施例
を例示的に詳しく説明する。図１及び図２は本発明の広
帯域２ダイポールアンテナの一実施例を示し、図１はそ
の斜視図、図２は左側面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be exemplarily described in detail below with reference to the drawings. 1 and 2 show an embodiment of a wideband two-dipole antenna of the present invention, FIG. 1 is a perspective view thereof, and FIG. 2 is a left side view thereof.
【００１５】図１及び図２において、広帯域２ダイポー
ルアンテナ１１は、互いに左右に、かつ平行に約０．６
波長離れて配設され、かつそれぞれ長さが約０．６波長
を有する２組のダイポール素子１２，１２と、該ダイポ
ール素子１２，１２の内側上部に、互いに平行に約０．
４波長離れて配設された２組の無給素子１３，１３と、
前記ダイポール素子１２，１２から約０．２波長の距離
を置いて、該ダイポール素子１２，１２に平行して配設
された０．８波長幅の平面状の反射板１４とから構成さ
れる。In FIG. 1 and FIG. 2, the wideband two-dipole antennas 11 are arranged on the left and right sides and in parallel with each other by about 0.6.
Two sets of dipole elements 12, 12 arranged at wavelengths apart from each other and each having a length of about 0.6 wavelength, and on the upper inside of the dipole elements 12, 12 in parallel with each other by about 0.
Two sets of unpaid elements 13 and 13 arranged at four wavelengths apart,
The dipole elements 12 and 12 are arranged in parallel with the dipole elements 12 and 12 at a distance of about 0.2 wavelength, and each of the dipole elements 12 and 12 has a 0.8-wavelength planar reflection plate 14.
【００１６】前記ダイポール素子１２，１２は、該反射
板１４に、約０．２波長離れて支持絶縁部材１５，１５
によりそれぞれ支持されるとともに、前記無給電素子１
３，１３は、ダイポール素子１２，１２の給電線路１
６，１６に対して、約０．０３波長上部に配置されるよ
うに、支持絶縁部材１７，１７によりそれぞれ支持され
る。なお、図中、１８は給電線路１６の中央に接続され
た給電バラン、１９は給電コネクタを示す。The dipole elements 12 and 12 are separated from the reflecting plate 14 by about 0.2 wavelengths, and the supporting insulating members 15 and 15 are provided.
And the parasitic element 1
3 and 13 are feed lines 1 of the dipole elements 12 and 12.
6 and 16 are respectively supported by the supporting insulating members 17 and 17 so as to be arranged at about 0.03 wavelength upper part. In the figure, 18 is a power supply balun connected to the center of the power supply line 16, and 19 is a power supply connector.
【００１７】前記ダイポール素子１２，１２の間に、互
いに平行、かつ対称的に配設された前記２組の無給電素
子１３，１３は、金属板であり、その内側を約０．３波
長に、その外側を約０．４波長にした台形状のものであ
る。The two sets of parasitic elements 13 and 13 which are arranged between the dipole elements 12 and 12 in parallel and symmetrically to each other are metal plates, and the inside thereof has a wavelength of about 0.3. The trapezoidal shape has an outside of about 0.4 wavelength.
【００１８】図３に、動作させたときの前記ダイポール
素子１２，１２と無給電素子１３，１３上の、低域及び
高域の各周波数における、電流分布を示す。電流は、低
域周波数においては、ダイポール素子１２，１２上にの
み主に分布しているが、高域周波数においては、ダイポ
ール素子１２，１２と無給電素子１３，１３上の双方に
分布している。FIG. 3 shows current distributions on the dipole elements 12 and 12 and the parasitic elements 13 and 13 when operated, at respective frequencies of low and high frequencies. At a low frequency, the current is mainly distributed only on the dipole elements 12, 12, but at a high frequency, the current is distributed on both the dipole elements 12, 12 and the parasitic elements 13, 13. There is.
【００１９】この高域周波数におけるダイポール素子１
２，１２上と無給電素子１３，１３上の電流分布によ
り、ダイポール素子１２，１２の間隔０．６波長と無給
電素子１３，１３の間隔０．４波長の間に、高域周波数
の電流分布の仮想的な中心が存在することとなり、低域
周波数に対し内側に位置することとなる。これにより、
低域周波数から高域周波数にわたって、等価的に等しい
波長間隔で電流分布の最大値が位置することとなり、水
平面指向特性半値幅を等しくすることができる。Dipole element 1 in this high frequency range
Due to the current distribution on 2, 2 and parasitic elements 13, 13, a high frequency current between the dipole elements 12, 12 having a wavelength of 0.6 wavelength and the parasitic elements 13, 13 having a wavelength of 0.4 wavelength. The virtual center of the distribution exists and is located inside the low frequency range. This allows
The maximum values of the current distribution are located at equivalent wavelength intervals from the low frequency to the high frequency, and the horizontal half-width of the directional characteristic can be made equal.
【００２０】本実施例における広帯域２ダイポールアン
テナ１１の水平面指向特性を図４に、その水平面半値幅
を図５に、その利得特性を図６にそれぞれ示す。図４，
図５，図６に示されるように、前記無給電素子１３，１
３により、水平面半値幅、利得の周波数特性が改善され
ているのがよく分かる。FIG. 4 shows the horizontal plane directivity characteristics of the wideband two-dipole antenna 11 in this embodiment, FIG. 5 shows the horizontal plane half-width, and FIG. 6 shows the gain characteristics thereof. Figure 4,
As shown in FIGS. 5 and 6, the parasitic elements 13 and 1 are
It can be clearly seen from Fig. 3 that the half-width of the horizontal plane and the frequency characteristics of gain are improved.
【００２１】又、無給電素子１３，１３の形状を、台形
から長方形にしたときの水平面半値幅を図５に示す。図
５より、台形形状の方がより周波数に対する変動が小さ
いことが分かる。これは、無給電素子１３，１３の内側
と外側の長さの違いにより、無給電素子１３，１３の外
側に中域周波数の電流分布の仮想的な中心が存在し、こ
れが周波数特性のより改善の要因となっている。FIG. 5 shows the half-width of the horizontal plane when the parasitic elements 13, 13 are formed from a trapezoidal shape to a rectangular shape. From FIG. 5, it can be seen that the trapezoidal shape has a smaller variation with respect to frequency. This is because there is a virtual center of the current distribution of the middle frequency outside the parasitic elements 13 and 13 due to the difference in length between the inside and outside of the parasitic elements 13 and 13, which improves the frequency characteristics. Is a factor of.
【００２２】なお、本発明の技術は前記実施例における
技術に限定されるものではなく、同様な機能を果す他の
態様の手段によってもよく、また本発明の技術は前記構
成の範囲内において種々の変更，付加が可能である。Note that the technique of the present invention is not limited to the technique in the above-described embodiment, and may be implemented by means of another aspect having the same function, and the technique of the present invention can be variously modified within the scope of the configuration. Can be changed or added.
【００２３】[0023]
【発明の効果】以上の説明から明らかなように本発明の
広帯域２ダイポールアンテナによれば、該ダイポールア
ンテナの２組のダイポール素子の間に、該ダイポール素
子に平行して、２組の無給電素子を互いに対称的に配設
することにより、セクタゾーンについて、周波数に対す
る水平面指向性半値幅と利得の変動の小さい均一したビ
ームを得ることができる。As is apparent from the above description, according to the wideband two-dipole antenna of the present invention, between two sets of dipole elements of the dipole antenna, two sets of non-power feeding are provided in parallel with the dipole elements. By arranging the elements symmetrically with respect to each other, it is possible to obtain a uniform beam having a small horizontal plane directional half-width with respect to frequency and a small gain variation in the sector zone.
【００２４】このため、８００ＭＨｚ帯のディジタル自
動車電話で必要とされる１７％の比帯域にわたって、水
平面指向特性の偏差を一定にすることができる。For this reason, the deviation of the horizontal plane directional characteristic can be made constant over the 17% ratio band required in the 800 MHz band digital mobile phone.
【図１】本発明の広帯域２ダイポールアンテナの一実施
例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of a wideband two-dipole antenna of the present invention.
【図２】本発明の一実施例を示し、図１の左側面図であ
る。FIG. 2 is a left side view of FIG. 1, showing an embodiment of the present invention.
【図３】本実施例のアンテナの低域周波数及び高域周波
数における電流分布を示す図である。FIG. 3 is a diagram showing a current distribution at a low frequency and a high frequency of the antenna of the present embodiment.
【図４】本実施例のアンテナにおける水平面指向特性図
である。FIG. 4 is a horizontal plane directional characteristic diagram of the antenna of the present embodiment.
【図５】本実施例のアンテナにおける水平面半値幅の周
波数特性図である。FIG. 5 is a frequency characteristic diagram of a horizontal plane half-value width in the antenna of the present embodiment.
【図６】本実施例のアンテナにおける利得の周波数特性
図である。FIG. 6 is a frequency characteristic diagram of gain in the antenna of the present embodiment.
【図７】従来のコーナ反射板付ダイポールアンテナの斜
視図である。FIG. 7 is a perspective view of a conventional dipole antenna with a corner reflector.
【図８】従来の２ダイポールアンテナの斜視図である。FIG. 8 is a perspective view of a conventional 2-dipole antenna.
【図９】従来の２ダイポールアンテナの水平面指向特性
図である。FIG. 9 is a horizontal plane directional characteristic diagram of a conventional two-dipole antenna.
【図１０】従来の２ダイポールアンテナの水平面半値幅
の周波数特性図である。FIG. 10 is a frequency characteristic diagram of a horizontal plane half-width of a conventional two-dipole antenna.
【図１１】従来の２ダイポールアンテナの利得の周波数
特性図である。FIG. 11 is a frequency characteristic diagram of gain of a conventional two-dipole antenna.
１１ 広帯域２ダイポールアンテナ １２ ダイポール素子 １３ 無給電素子 １４ 反射板 11 Broadband 2 dipole antenna 12 Dipole element 13 Parasitic element 14 Reflector
Claims (2)
組のダイポール素子と、該ダイポール素子より約０．２
波長（波長は使用される周波数の波長をいう）離れた位
置に配設された反射板とから成る２ダイポールアンテナ
において、 前記２組のダイポール素子の間に、該ダイポール素子に
平行して、２組の無給電素子を互いに対称的に配設した
ことを特徴とする広帯域２ダイポールアンテナ。1. Two arranged side by side and in parallel with each other
A set of dipole elements and about 0.2 from the dipole elements
A two-dipole antenna comprising a reflector disposed at a position separated by a wavelength (a wavelength is a wavelength of a frequency used), wherein two dipole elements are provided in parallel with the two dipole elements. A wideband two-dipole antenna in which a pair of parasitic elements are symmetrically arranged.
短く、外側は長い台形状の金属板から成ることを特徴と
する請求項１の広帯域２ダイポールアンテナ。2. The wideband two-dipole antenna according to claim 1, wherein the two sets of parasitic elements are made of trapezoidal metal plates having a short inner side and a long outer side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21905892A JP3320107B2 (en) | 1992-08-18 | 1992-08-18 | Broadband two dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21905892A JP3320107B2 (en) | 1992-08-18 | 1992-08-18 | Broadband two dipole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0669716A true JPH0669716A (en) | 1994-03-11 |
| JP3320107B2 JP3320107B2 (en) | 2002-09-03 |
Family
ID=16729612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21905892A Expired - Lifetime JP3320107B2 (en) | 1992-08-18 | 1992-08-18 | Broadband two dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3320107B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003051708A (en) * | 2001-08-06 | 2003-02-21 | Nippon Dengyo Kosaku Co Ltd | Antenna |
| JP2007028168A (en) * | 2005-07-15 | 2007-02-01 | Hokuriku Electric Ind Co Ltd | Plane antenna |
| JP2009017115A (en) * | 2007-07-03 | 2009-01-22 | Nippon Antenna Co Ltd | Planar antenna with reflecting plate |
| JP2009111662A (en) * | 2007-10-30 | 2009-05-21 | Denki Kogyo Co Ltd | Array antenna sharing frequency |
| JP2009231927A (en) * | 2008-03-19 | 2009-10-08 | Dx Antenna Co Ltd | Antenna device |
| JP2009290446A (en) * | 2008-05-28 | 2009-12-10 | Nippon Soken Inc | Planar antenna, communication device, and method for mounting planar antenna |
| JP2010057007A (en) * | 2008-08-29 | 2010-03-11 | Dx Antenna Co Ltd | Antenna |
| JP2012142879A (en) * | 2011-01-06 | 2012-07-26 | Hitachi Cable Ltd | Sector antenna |
-
1992
- 1992-08-18 JP JP21905892A patent/JP3320107B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003051708A (en) * | 2001-08-06 | 2003-02-21 | Nippon Dengyo Kosaku Co Ltd | Antenna |
| JP4516246B2 (en) * | 2001-08-06 | 2010-08-04 | 日本電業工作株式会社 | antenna |
| JP2007028168A (en) * | 2005-07-15 | 2007-02-01 | Hokuriku Electric Ind Co Ltd | Plane antenna |
| JP2009017115A (en) * | 2007-07-03 | 2009-01-22 | Nippon Antenna Co Ltd | Planar antenna with reflecting plate |
| JP2009111662A (en) * | 2007-10-30 | 2009-05-21 | Denki Kogyo Co Ltd | Array antenna sharing frequency |
| JP4588750B2 (en) * | 2007-10-30 | 2010-12-01 | 電気興業株式会社 | Frequency sharing array antenna |
| JP2009231927A (en) * | 2008-03-19 | 2009-10-08 | Dx Antenna Co Ltd | Antenna device |
| JP2009290446A (en) * | 2008-05-28 | 2009-12-10 | Nippon Soken Inc | Planar antenna, communication device, and method for mounting planar antenna |
| JP4623141B2 (en) * | 2008-05-28 | 2011-02-02 | 株式会社日本自動車部品総合研究所 | Planar antenna, communication apparatus, and mounting method of planar antenna |
| JP2010057007A (en) * | 2008-08-29 | 2010-03-11 | Dx Antenna Co Ltd | Antenna |
| JP2012142879A (en) * | 2011-01-06 | 2012-07-26 | Hitachi Cable Ltd | Sector antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3320107B2 (en) | 2002-09-03 |
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