JPH0151204B2 - - Google Patents
Info
- Publication number
- JPH0151204B2 JPH0151204B2 JP57206192A JP20619282A JPH0151204B2 JP H0151204 B2 JPH0151204 B2 JP H0151204B2 JP 57206192 A JP57206192 A JP 57206192A JP 20619282 A JP20619282 A JP 20619282A JP H0151204 B2 JPH0151204 B2 JP H0151204B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- feed line
- coaxial feed
- sleeve antenna
- feeding
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radio Transmission System (AREA)
Description
【発明の詳細な説明】
自動車電話方式における自動車搭載用移動局ア
ンテナにダイバーシチ効果を得るため、複数のア
ンテナを上、下に配置した構成法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a configuration method in which a plurality of antennas are arranged above and below in order to obtain a diversity effect in a mobile station antenna mounted on a car in a car telephone system.
従来から800MHz帯を用いた自動車電話用移動
局アンテナとして機能上、美観上から、１つの棒
状の外観を有する線状のアンテナを用い（利得は
0dBd）、最近受信利得の向上を図るため自動車の
移動機側でダイバーシチ受信を行う方式が検討さ
れている。ダイバーシチを行うためには、２個以
上のアンテナが必要で、単に上下に配列する方法
として第１図ａ，ｂのように、スリーブアンテナ
またはダイポールアンテナの２段配列がある。こ
の構成では上段アンテナの給電線が下段アンテナ
の放射特性を劣化させること、アンテナを覆うべ
く配置されるレドームの径を大きくする必要があ
り、美観を損ねる等の欠点があつた。 Conventionally, a linear antenna with a rod-like appearance has been used as a mobile station antenna for car phones using the 800MHz band for both functional and aesthetic reasons (the gain is
0dBd), and recently a method of performing diversity reception on the mobile device side of a car has been studied in order to improve reception gain. In order to perform diversity, two or more antennas are required, and a two-stage arrangement of sleeve antennas or dipole antennas is a simple method of arranging them one above the other, as shown in FIGS. 1a and 1b. This configuration has drawbacks such as the feed line of the upper antenna deteriorating the radiation characteristics of the lower antenna, and the need to increase the diameter of the radome placed to cover the antenna, which impairs the aesthetics.
本発明はこれらの欠点を除去するために、同一
軸上に給電線を含め２つのアンテナを構成したこ
とを特徴とし、その目的は上段アンテナの給電線
による下段アンテナ放射特性の劣化、外径寸法の
増大をなくしたものである。 In order to eliminate these drawbacks, the present invention is characterized by configuring two antennas including a feed line on the same axis.The purpose of this invention is to reduce the deterioration of the radiation characteristics of the lower antenna due to the feed line of the upper antenna, and to reduce the outer diameter dimension. This eliminates the increase in
一般に陸上移動通信用移動局アンテナは線状ア
ンテナが用いられている。２つの線状アンテナを
用い、ダイバーシチ受信する場合、まとまりよく
アンテナ実装するためには放射素子及び給電線を
同一軸上に配置する必要がある。また自動車電話
方式にダイバーシチを導入しようとすれば、比帯
域９％でVSWR1.5を満足しなければならない。
これらの条件を満足するアンテナとしてスリーブ
アンテナがある。 Generally, a linear antenna is used as a mobile station antenna for land mobile communication. When performing diversity reception using two linear antennas, it is necessary to arrange the radiating element and the feed line on the same axis in order to mount the antennas in a cohesive manner. Furthermore, if diversity is to be introduced into a car telephone system, a VSWR of 1.5 must be satisfied with a fractional bandwidth of 9%.
A sleeve antenna is an antenna that satisfies these conditions.
第２図は本発明の実施例であつて、１０は上段
スリーブアンテナの内導体、８は上段スリーブア
ンテナの放射部、９は上段スリーブアンテナの
λ／４スペルトツプ、１４は下段スリーブアンテ
ナの内導体、１２は下段スリーブアンテナの放射
部、１３は下段スリーブアンテナのλ／４スペル
トツプ、１１は上段スリーブアンテナの給電線外
導体、１６は上段スリーブアンテナの給電端子、
１７は下段スリーブアンテナの給電端子、１５は
下段スリーブアンテナの外導体、５は電波吸収体
または電流阻止金具、６は上段スリーブアンテナ
給電線取り出し孔、７はプラスチツクレドームで
ある。 FIG. 2 shows an embodiment of the present invention, in which 10 is the inner conductor of the upper sleeve antenna, 8 is the radiation part of the upper sleeve antenna, 9 is the λ/4 spell top of the upper sleeve antenna, and 14 is the inner conductor of the lower sleeve antenna. , 12 is the radiation part of the lower sleeve antenna, 13 is the λ/4 spell top of the lower sleeve antenna, 11 is the outer conductor of the feed line of the upper sleeve antenna, 16 is the feed terminal of the upper sleeve antenna,
17 is a feed terminal of the lower sleeve antenna, 15 is an outer conductor of the lower sleeve antenna, 5 is a radio wave absorber or a current blocking metal fitting, 6 is a hole for taking out a feed line of the upper sleeve antenna, and 7 is a plastic dome.
上段スリーブアンテナはアンテナの起電点より
４分の１波長の放射部８とλ／４スペルトツプ９
により２分の１波長の放射器として構成され、こ
れに電流が誘起する。また、下段スリーブアンテ
ナとしてはアンテナ起電点より４分の１波長の放
射部１２とλ／４スペルトツプ１３により２分の
１波長の放射器として構成され、これに電流が上
段スリーブアンテナと独立に誘起する。上・下段
スリーブアンテナの間には上段スリーブアンテナ
の給電線外導体１１と接続した電波吸収体または
電流阻止金具５が取り付けられ、下段スリーブア
ンテナのインピーダンス特性に上段スリーブアン
テナの漏洩電流が影響を及ぼさないようになつて
いる。 The upper sleeve antenna has a radiation part 8 of a quarter wavelength from the electromotive point of the antenna and a λ/4 spell top 9.
It is configured as a 1/2 wavelength radiator, and a current is induced in it. In addition, the lower sleeve antenna is configured as a 1/2 wavelength radiator with a 1/4 wavelength radiator 12 and a λ/4 spell top 13 from the antenna electromotive point, and the current is transmitted to this radiator independently from the upper sleeve antenna. induce. A radio wave absorber or current blocking fitting 5 connected to the feed line outer conductor 11 of the upper sleeve antenna is installed between the upper and lower sleeve antennas to prevent the leakage current of the upper sleeve antenna from affecting the impedance characteristics of the lower sleeve antenna. It seems like there is no such thing.
上段スリーブアンテナの内導体１０と上段スリ
ーブアンテナの外導体１１からなる同軸給電線は
下段スリーブアンテナの放射部１２、下段スリー
ブアンテナの内導体１４の内部を貫通して、上段
スリーブアンテナの給電線取出し孔６より取り出
される。このため下段スリーブアンテナの同軸給
電線の一部に小さな孔があくが伝送特性に問題の
ないものである。 The coaxial feed line consisting of the inner conductor 10 of the upper sleeve antenna and the outer conductor 11 of the upper sleeve antenna passes through the radiating part 12 of the lower sleeve antenna and the inside of the inner conductor 14 of the lower sleeve antenna, and takes out the feed line of the upper sleeve antenna. It is taken out from the hole 6. For this reason, a small hole is formed in a part of the coaxial feed line of the lower sleeve antenna, but there is no problem with the transmission characteristics.
７はアンテナ全体を覆うプラスチツクレドーム
でアンテナの機械的な強度はこのプラスチツクレ
ドーム７により保持される。 A plastic dome 7 covers the entire antenna, and the mechanical strength of the antenna is maintained by the plastic dome 7.
以上のようにアンテナ構成上、上・下段アンテ
ナを近接することができるためアンテナ全長を低
くすることができ、また同一軸上に２つのアンテ
ナを実装したためアンテナの太さも細くでき、給
電線の影響をなくした利点がある。 As mentioned above, due to the antenna configuration, the upper and lower antennas can be placed close to each other, making it possible to reduce the overall length of the antenna.In addition, since two antennas are mounted on the same axis, the thickness of the antenna can also be made thinner, making it possible to reduce the influence of feed lines. This has the advantage of eliminating the
以上説明したように、ダイバーシチ受信するた
めにアンテナを１体化したことにより、外形上１
つのアンテナとして構成できるため、アンテナ取
付が簡易である利点がある。 As explained above, by integrating the antenna for diversity reception,
Since it can be configured as one antenna, it has the advantage that antenna installation is simple.
また従来のダイバーシチのない自動車電話用移
動局アンテナと同じ形でダイバーシチ機能を有す
るアンテナを実現したため、自動車電話加入者に
従来のアンテナとの違和感なしにダイバーシチを
導入することができる利点がある。 Furthermore, since we have realized an antenna with a diversity function in the same form as a conventional non-diversity car phone mobile station antenna, there is the advantage that diversity can be introduced to car phone subscribers without any discomfort with conventional antennas.
第１図は２個のアンテナを上下に配列する従来
の構造を示す図であり、図ａはスリーブアンテナ
の場合であり、図ｂはダイポールアンテナの場合
である。第２図は本発明のアンテナの１実施例の
構成を示す図である。
１……上段スリーブアンテナ、１′……上段ダ
イポールアンテナ、２……下段スリーブアンテ
ナ、２′……下段ダイポールアンテナ、３，３′…
…アンテナ支持柱、４ａ，４ｂ，４′ａ，４′ｂ…
…同軸給電線、５……電波吸収体又は電流阻止金
具、６……上段スリーブアンテナの給電線取出し
孔、７……プラスチツクレドーム、８……上段ス
リーブアンテナ放射部、９……上段スリーブアン
テナのλ／４スペルトツプ、１０……上段スリー
ブアンテナの内導体、１１……上段スリーブアン
テナの給電線外導体、１２……下段スリーブアン
テナの放射部、１３……下段スリーブアンテナの
λ／４スペルトツプ、１４……下段スリーブアン
テナの内導体、１５……下段スリーブアンテナの
外導体、１６……上段スリーブアンテナの給電端
子、１７……下段スリーブアンテナの給電端子。
FIG. 1 is a diagram showing a conventional structure in which two antennas are arranged one above the other. FIG. 1A shows a case of a sleeve antenna, and FIG. 1B shows a case of a dipole antenna. FIG. 2 is a diagram showing the configuration of one embodiment of the antenna of the present invention. 1... Upper sleeve antenna, 1'... Upper dipole antenna, 2... Lower sleeve antenna, 2'... Lower dipole antenna, 3, 3'...
...Antenna support pillars, 4a, 4b, 4'a, 4'b...
... Coaxial feed line, 5 ... Radio wave absorber or current blocking metal fitting, 6 ... Feeder line extraction hole of upper sleeve antenna, 7 ... Plastic dome, 8 ... Upper sleeve antenna radiation part, 9 ... ... of upper sleeve antenna λ/4 spell top, 10... Inner conductor of upper sleeve antenna, 11... Outer conductor of feeder line of upper sleeve antenna, 12... Radiation part of lower sleeve antenna, 13... λ/4 spell top of lower sleeve antenna, 14 ... Inner conductor of the lower sleeve antenna, 15 ... Outer conductor of the lower sleeve antenna, 16 ... Power supply terminal of the upper sleeve antenna, 17 ... Power supply terminal of the lower sleeve antenna.
Claims (1)
リーブアンテナを上段下段に縦列に配置しダイバ
ーシチ効果を得る移動局用アンテナであつて、上
段アンテナ給電用の直線状の同軸給電線を有し、
該同軸給電線の外側に同心円筒状に設けられた二
層の導体からなる下段アンテナ給電用の同軸給電
線を有し、該下段アンテナ給電用の同軸給電線の
前記二層の同心円筒状の導体に前記上段アンテナ
給電用の同軸給電線貫通孔を有することを特徴と
した移動局ダイバーシチアンテナ装置。1. A mobile station antenna that obtains a diversity effect by arranging two sleeve antennas in tandem in an upper and lower stage in land mobile communication using vertical polarization, and has a linear coaxial feed line for feeding power to the upper stage antenna,
It has a coaxial feed line for feeding a lower antenna consisting of two layers of conductors provided in a concentric cylindrical shape on the outside of the coaxial feed line, and the coaxial feed line for feeding the lower antenna has a concentric cylindrical shape of the two layers. A mobile station diversity antenna device, characterized in that the conductor has a coaxial feed line through hole for feeding the upper antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57206192A JPS5997207A (en) | 1982-11-26 | 1982-11-26 | Diversity antenna device of mobile station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57206192A JPS5997207A (en) | 1982-11-26 | 1982-11-26 | Diversity antenna device of mobile station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5997207A JPS5997207A (en) | 1984-06-05 |
| JPH0151204B2 true JPH0151204B2 (en) | 1989-11-02 |
Family
ID=16519325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57206192A Granted JPS5997207A (en) | 1982-11-26 | 1982-11-26 | Diversity antenna device of mobile station |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5997207A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2515153Y2 (en) * | 1988-08-23 | 1996-10-30 | 電気興業株式会社 | Mobile station diversity antenna device |
| JP2985196B2 (en) * | 1989-11-01 | 1999-11-29 | 株式会社デンソー | Vehicle antenna device |
| US6091366A (en) * | 1997-07-14 | 2000-07-18 | Hitachi Cable Ltd. | Microstrip type antenna device |
| EP1892380A1 (en) | 2006-08-25 | 2008-02-27 | Siemens Aktiengesellschaft | Turbine blade retention system |
| JP5922370B2 (en) * | 2011-10-20 | 2016-05-24 | 三菱日立パワーシステムズ株式会社 | Rotor blade support structure |
-
1982
- 1982-11-26 JP JP57206192A patent/JPS5997207A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5997207A (en) | 1984-06-05 |
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