JP2513000Y2 - Train antenna device - Google Patents
Train antenna deviceInfo
- Publication number
- JP2513000Y2 JP2513000Y2 JP1990023002U JP2300290U JP2513000Y2 JP 2513000 Y2 JP2513000 Y2 JP 2513000Y2 JP 1990023002 U JP1990023002 U JP 1990023002U JP 2300290 U JP2300290 U JP 2300290U JP 2513000 Y2 JP2513000 Y2 JP 2513000Y2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- antennas
- antenna
- train
- ceiling
- 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
- Details Of Aerials (AREA)
Description
【考案の詳細な説明】 〔概要〕 水平偏波の放送受信に適した列車用アンテナに関し、 車両の天井部に内蔵しても水平偏波無指向性となるよ
うにすることを目的とし、 列車の天井と屋根の水平部との間であって、且つ天井
の中央部に設置された金属製品と、樹脂からなる天井の
列車進行方向左右の側壁部と前記金属製品との間の両空
きスペースに各々設けられた左右の水平偏波無指向性の
アンテナと、前記左右のアンテナの両方の出力を逆相で
合成する逆相合成手段と、前記左右のアンテナの両方の
出力を同相で合成する同相合成手段と、前記逆相合成手
段或いは前記同相合成手段からの出力を選択して受信す
る受信手段とを備えるよう構成する。[Detailed Description of the Invention] [Outline] A train antenna suitable for receiving horizontally polarized broadcasts, with the purpose of making it horizontally omnidirectional even if it is installed in the ceiling of a vehicle. Space between the ceiling and the horizontal part of the roof and in the center of the ceiling, and the empty space between the metal products and the side walls on the left and right in the train traveling direction of the ceiling made of resin Left and right horizontally polarized omnidirectional antennas, respectively, anti-phase combining means for combining outputs of both the left and right antennas in opposite phase, and combining outputs of both the left and right antennas in same phase The in-phase synthesizing means and the receiving means for selecting and receiving the output from the in-phase synthesizing means or the in-phase synthesizing means are configured.
〔産業上の利用分野〕 本考案は、水平偏波の放送受信に適した列車用アンテ
ナ装置に関する。[Field of Industrial Application] The present invention relates to a train antenna device suitable for receiving horizontally polarized broadcasts.
列車用アンテナは一般に屋根の上に設置するタイプが
多いが、風切音の発生や風雨による損傷等を防止するに
は車両内部に設置することが望ましい。Many types of train antennas are generally installed on the roof, but it is desirable to install them inside the vehicle to prevent wind noise and damage due to wind and rain.
列車用アンテナとして代表的なホイップアンテナや逆
Ｌ字アンテナは一般に屋根の上に立設される。この種の
アンテナは垂直偏波アンテナであるため、水平偏波の放
送受信にはロスが多い。水平偏波受信用としては水平ダ
イポールアンテナがあるが、これを列車の進行方向に沿
って設置すると、その指向性が８の字型のため列車に沿
った方向からの電波が受信しにくい難点がある。これに
対し、ダイポールアンテナのエレメントを４角に折り曲
げたスクエアローアンテナや円環状に湾曲させたヘイロ
ーアンテナは水平偏波に対し無指向性であるので、水平
偏波で送信される放送を位置および向きを変えながら受
信する列車用としては理想的である。A typical whip antenna or inverted L-shaped antenna as a train antenna is generally erected on the roof. Since this type of antenna is a vertically polarized antenna, there are many losses in receiving horizontally polarized broadcasts. There is a horizontal dipole antenna for receiving horizontally polarized waves, but if this antenna is installed along the traveling direction of the train, the directivity of the antenna is a figure-8 shape, which makes it difficult to receive radio waves from the direction along the train. is there. On the other hand, since the square low antenna in which the elements of the dipole antenna are bent in a square shape or the halo antenna in which the elements are curved in an annular shape are omnidirectional with respect to the horizontal polarized wave, the broadcast transmitted by the horizontal polarized wave is positioned and positioned. It is ideal for trains that receive while changing direction.
しかしながら、上述したローアンテナを車両の内部に
設置するには、車両が金属製であり、また内部にもエア
コンディショナ等の金属製品を設置しているため、これ
らの磁気シールド効果によって充分な受信電界を得られ
ない問題がある。However, in order to install the above-mentioned low antenna inside the vehicle, since the vehicle is made of metal and metal products such as an air conditioner are also installed inside the vehicle, the magnetic shield effect of these makes sufficient reception. There is a problem that an electric field cannot be obtained.
本考案は複数のローアンテナを用いることにより、車
両内部において無指向性となる水平偏波用アンテナを実
現しようとするものである。The present invention is intended to realize an omnidirectional horizontal polarization antenna by using a plurality of low antennas.
第１図は本考案の原理図で、（ａ）は外観図、（ｂ）
は上面図、（ｃ）は断面図である。図中、１は車両、２
は屋根、３は天井、４はエアコンディショナ（A/C）、
５は窓、A1,A2はスクエアロー（またはヘイロー）アン
テナである。屋根２の水平部21は金属製であるが、側壁
部22は樹脂製である。A/C4は天井３の上部中央に設置さ
れている。アンテナ5A,5BはA/C4の左右に分けて天井３
上の空間に設置される。FIG. 1 is a principle view of the present invention, (a) is an external view, (b)
Is a top view and (c) is a cross-sectional view. In the figure, 1 is a vehicle, 2
Is a roof, 3 is a ceiling, 4 is an air conditioner (A / C),
Reference numeral 5 is a window, and A1 and A2 are square low (or halo) antennas. The horizontal portion 21 of the roof 2 is made of metal, while the side wall portion 22 is made of resin. The A / C4 is installed in the center of the upper part of the ceiling 3. Antennas 5A and 5B are divided into left and right of A / C4 and ceiling 3
It is installed in the space above.
第１図の構成であると、左側のアンテナA1はA/C4に妨
害されて右側の受信感度が低く、また右側のアンテナA2
は左側の受信感度が低い。この結果、本来無指向性であ
るアンテナA1,A2もその指向性B1,B2は半分に制約され
る。しかし、指向性B1,B2は逆向きであるため、両者を
合成すれば無指向性に近い特性が得られる。In the configuration of FIG. 1, the left antenna A1 is disturbed by A / C4 and the right reception sensitivity is low, and the right antenna A2
Has low reception sensitivity on the left side. As a result, the directional characteristics B1 and B2 of the antennas A1 and A2, which are originally omnidirectional, are restricted to half. However, since the directivities B1 and B2 are opposite to each other, a characteristic close to omnidirectional can be obtained by combining them.
このようにアンテナA1,A2を左右に分けて配置するこ
とで指向性ダイバーシティの効果を生ずるが、必ずしも
対向している必要はない。車両１の進行方向にずれてい
れば、スペースダイバーシティの効果もでる。By arranging the antennas A1 and A2 separately on the left and right sides in this way, a directivity diversity effect is produced, but they do not necessarily have to face each other. If the vehicle 1 is displaced in the traveling direction, the effect of space diversity can be obtained.
第２図はスクエアローアンテナの説明図で、（ａ）は
構成図、（ｂ）は指向特性図である。エレメント41は長
さλ/2の導電性部材を４角に折り曲げたもので、図示の
例ではその中心点P0に同軸ケーブル50の外導体51を接続
し、また中心からずれた給電点P1に中心導体52を接続す
るオフセンター給電をしている。Ｃはインピーダンス調
整用の可変コンデンサで、中心導体52と給電点P1の間に
挿入される。実際に中心導体52を給電点P1に接続するに
は副エレメント42とショートバー43を用いる（これらは
一体化されていてもよい）。この様なオフセンター給電
をするとエレメント41と同軸ケーブル50のインピーダン
スを整合させ易い。またコンデンサＣを用いることによ
って共振のＱを下げ、広いFM帯域をカバーできるように
してある。このコンデンサＣと共振するインダクタンス
（Ｌ）成分はエレメント41、副エレメント42、ショート
バー43を分布している。FIG. 2 is an explanatory diagram of the square low antenna, (a) is a configuration diagram, and (b) is a directional characteristic diagram. The element 41 is formed by bending a conductive member having a length of λ / 2 into four corners. In the illustrated example, the outer conductor 51 of the coaxial cable 50 is connected to the center point P 0 thereof, and the feeding point P is deviated from the center. Off-center power supply for connecting the center conductor 52 to 1 is provided. C is a variable capacitor for impedance adjustment, which is inserted between the center conductor 52 and the feeding point P 1 . To actually connect the center conductor 52 to the feeding point P 1 , the sub-element 42 and the short bar 43 are used (these may be integrated). Such off-center power feeding facilitates matching the impedances of the element 41 and the coaxial cable 50. Further, by using the capacitor C, the Q of resonance is lowered and a wide FM band can be covered. The inductance (L) component resonating with the capacitor C is distributed in the element 41, the sub-element 42, and the short bar 43.
第３図は本考案の一実施例を示す構造図で、11,12は
アンテナA2を水平に支持するマストポール、13はエレメ
ントの開放端を支持する樹脂モールド部、14はエレメン
トの給電端を支持する樹脂モールド部であり、マストポ
ール11,12は天井３の上面にネジ止め等により固定され
る。アンテナA1側も同様の構造で支持される。FIG. 3 is a structural view showing an embodiment of the present invention, in which 11 and 12 are mast poles for horizontally supporting the antenna A2, 13 is a resin mold portion for supporting the open end of the element, and 14 is a feeding end of the element. The mast poles 11 and 12 which are resin mold parts to support are fixed to the upper surface of the ceiling 3 by screwing or the like. The antenna A1 side is also supported by the same structure.
第４図はアンテナA1,A2出力の使用法を示している。
同図（１）は選択部31でアンテナA1,A2の出力の一方を
選択して受信部32に入力する指向性ダイバーシティ方式
である。（2A）はアンテナA1,A2の出力を逆相で合成し
て受信する方式の指向性を示し、また（2B）はそれらを
同相で合成して受信する方式の指向性を示している。B
1,B2は各アンテナA1,A2による指向性である。（３）は
（2A）の逆相合成出力と（2B）の同相合成出力を選択し
て受信するようにしたもので、33は逆相合成器、34は同
相合成器である。FIG. 4 shows how to use the outputs of the antennas A1 and A2.
FIG. 1A shows a directional diversity system in which one of the outputs of the antennas A1 and A2 is selected by the selection unit 31 and input to the reception unit 32. (2A) shows the directivity of the method of combining the outputs of the antennas A1 and A2 in the opposite phase and receiving them, and (2B) shows the directivity of the method of combining them and receiving them in the same phase. B
1 and B2 are the directivities of the antennas A1 and A2. (3) is for selecting and receiving the anti-phase composite output of (2A) and the in-phase composite output of (2B), 33 is an anti-phase combiner, and 34 is an in-phase combiner.
以上述べたように本考案によれば、金属性部分の多い
列車内に水平偏波無指向性のアンテナを実現できるの
で、風切音や風雨による損傷等を生じさせず、且つ列車
の前後、左右方向の両方の指向性を強調でき、選択でき
る利点がある。As described above, according to the present invention, a horizontally polarized omnidirectional antenna can be realized in a train with many metal parts, so that wind noise and damage due to wind and rain do not occur, and before and after the train, Both directivity in the left and right directions can be emphasized, and there is an advantage that it can be selected.
第１図は本考案の原理図、 第２図はスクエアローアンテナの説明図、 第３図は本考案の一実施例を示す構造図、 第４図は本考案のアンテナ出力使用法の説明図である。 図中、１は車両、２は屋根、３は天井、４はエアコンデ
ィショナ、A1,A2はスクエアローアンテナ、31は選択
部、32は受信部、33,34は合成部である。FIG. 1 is a principle diagram of the present invention, FIG. 2 is an explanatory diagram of a square low antenna, FIG. 3 is a structural diagram showing an embodiment of the present invention, and FIG. 4 is an explanatory diagram of usage of antenna output of the present invention. Is. In the figure, 1 is a vehicle, 2 is a roof, 3 is a ceiling, 4 is an air conditioner, A1 and A2 are square low antennas, 31 is a selecting unit, 32 is a receiving unit, and 33 and 34 are combining units.
Claims (1)
（21）との間であって、且つ天井（３）の中央部に設置
された金属製品と、 樹脂からなる天井（３）の列車進行方向左右の側壁部
（22）と前記金属製品との間の両空きスペースに各々設
けられた左右の水平偏波無指向性のアンテナ（A1,A2）
と、 前記左右のアンテナ（A1,A2）の両方の出力を逆相で合
成する逆相合成手段と、 前記左右のアンテナ（A1,A2）の両方の出力を同相で合
成する同相合成手段と、 前記逆相合成手段或いは前記同相合成手段からの出力を
選択して受信する受信手段とを備えたことを特徴とする
列車用アンテナ装置。1. A metal product installed between a train ceiling (3) and a horizontal portion (21) of the roof (2) and in the center of the ceiling (3), and a ceiling made of resin ( 3) Left and right horizontal polarization omnidirectional antennas (A1, A2) provided in both open spaces between the left and right side walls (22) in the train traveling direction and the metal product
And an anti-phase synthesizing means for synthesizing both outputs of the left and right antennas (A1, A2) in anti-phase, and an in-phase synthesizing means for synthesizing both outputs of the left and right antennas (A1, A2) in-phase, A train antenna device, comprising: a receiving unit that selects and receives an output from the anti-phase combining unit or the in-phase combining unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990023002U JP2513000Y2 (en) | 1990-03-07 | 1990-03-07 | Train antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990023002U JP2513000Y2 (en) | 1990-03-07 | 1990-03-07 | Train antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03113512U JPH03113512U (en) | 1991-11-20 |
| JP2513000Y2 true JP2513000Y2 (en) | 1996-10-02 |
Family
ID=31526006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990023002U Expired - Fee Related JP2513000Y2 (en) | 1990-03-07 | 1990-03-07 | Train antenna device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513000Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011217109A (en) * | 2010-03-31 | 2011-10-27 | Kddi Corp | Antenna device |
| JP5849253B2 (en) * | 2010-10-19 | 2016-01-27 | 日東工業株式会社 | Vehicle charging stand |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6047523A (en) * | 1983-08-26 | 1985-03-14 | Nippon Telegr & Teleph Corp <Ntt> | On-vehicle type mobile station antenna |
| JPS61121605A (en) * | 1984-11-19 | 1986-06-09 | Nippon Sheet Glass Co Ltd | Antenna system for automobile |
-
1990
- 1990-03-07 JP JP1990023002U patent/JP2513000Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03113512U (en) | 1991-11-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |