JPH0339402B2 - - Google Patents
Info
- Publication number
- JPH0339402B2 JPH0339402B2 JP22179884A JP22179884A JPH0339402B2 JP H0339402 B2 JPH0339402 B2 JP H0339402B2 JP 22179884 A JP22179884 A JP 22179884A JP 22179884 A JP22179884 A JP 22179884A JP H0339402 B2 JPH0339402 B2 JP H0339402B2
- Authority
- JP
- Japan
- Prior art keywords
- offset
- vehicle
- antenna
- reflector
- rotation shaft
- 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
- 230000005855 radiation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3216—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used where the road or rail vehicle is only used as transportation means
Landscapes
- Support Of Aerials (AREA)
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、通信衛星に対する移動型地球局の送
受信に利用される。本発明は道路運送車両法の適
用を受ける車両に搭載することのできるオフセツ
トアンテナの構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is utilized for transmitting and receiving data from a mobile earth station to a communication satellite. The present invention relates to the structure of an offset antenna that can be mounted on a vehicle to which the Road Transport Vehicle Act applies.
〔従来の技術〕
最近の衛星通信技術の進展に伴い災害発生時や
行事の開催など臨時的に任意の地点に通信衛星の
地球局を設置する必要が生じている。[Background Art] With the recent progress in satellite communication technology, it has become necessary to temporarily install a communication satellite earth station at any location, such as when a disaster occurs or when an event is held.
オフセツトアンテナは指向特性が優れアンテナ
雑音温度が低いため、このような地球局のアンテ
ナに適している。 Offset antennas have excellent directivity and low antenna noise temperature, so they are suitable for use as antennas for such earth stations.
第５図および第６図にこのオフセツトアンテナ
の概要図を示す。ここで第５図は楕円状のオフセ
ツト反射鏡１を縦に設置した型式であり、第６図
はこのオフセツト反射鏡を横に設置した型式を示
す。ここで符号Ｄはオフセツト反射鏡の有効径
（短径）を示し、符号１２は俯仰回転軸を示す。 FIGS. 5 and 6 show schematic diagrams of this offset antenna. Here, FIG. 5 shows a type in which an elliptical offset reflecting mirror 1 is installed vertically, and FIG. 6 shows a type in which this offset reflecting mirror 1 is installed horizontally. Here, the symbol D indicates the effective diameter (minor diameter) of the offset reflecting mirror, and the symbol 12 indicates the elevation rotation axis.
このようなオフセツトアンテナを移動型地球
局、すなわち車両に搭載した場合には、車両に関
する法規上の制約により車高または車幅制限を受
ける。
When such an offset antenna is mounted on a mobile earth station, ie, a vehicle, vehicle height or vehicle width is restricted due to legal restrictions regarding vehicles.
すなわち第５図に示すようなオフセツトアンテ
ナをそのまま搭載すれば高さの制約を受け、また
第６図に示すオフセツトアンテナを搭載すれば車
幅の制約を受ける。 That is, if the offset antenna shown in FIG. 5 is mounted as is, there will be a height restriction, and if the offset antenna shown in FIG. 6 is mounted, the vehicle width will be restricted.
これらの構造の特徴は、第５図および第６図に
示すように、俯仰回転軸１２の軸方向はオフセツ
ト反射鏡１の短径方向に平行な構造となつている
ことである。ここで短径方向は第５図および第６
図において紙面に垂直な方向である。 A feature of these structures is that, as shown in FIGS. 5 and 6, the axial direction of the elevation rotation shaft 12 is parallel to the minor diameter direction of the offset reflecting mirror 1. Here, the short axis direction is shown in Figures 5 and 6.
In the figure, the direction is perpendicular to the paper surface.
本発明は車両法規上の制約内でオフセツトアン
テナの有効径を最大限にすることができ車両に搭
載して地球局としての取り扱いやすい車両搭載型
オフセツトアンテナを提供することを目的とす
る。 SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle-mounted offset antenna that can maximize the effective diameter of the offset antenna within the constraints of vehicle regulations and is easy to handle as an earth station when mounted on a vehicle.
本発明は、放射給電部と、この放射給電部に対
向するオフセツト反射鏡と、このオフセツト反射
鏡裏面に取付けられた仰角度変更用のアンテナ回
転軸部と、このアンテナ回転軸部を支持する方位
回転台と、この方位回転台を搭載する車両とを備
えた車両搭載型オフセツトアンテナにおいて、
上記アンテナ回転軸部の軸線は上記オフセツト
反射鏡の長径方向とほぼ平行に設定され、上記オ
フセツト反射鏡の長径方向が上記車両の前後方向
とほぼ平行に設定されることを特徴とする。
The present invention provides a radiation feeding section, an offset reflecting mirror facing the radiation feeding section, an antenna rotating shaft section for changing the elevation angle attached to the back surface of the offset reflecting mirror, and an azimuth that supports the antenna rotating shaft section. In a vehicle-mounted offset antenna equipped with a rotary table and a vehicle on which the azimuth rotary table is mounted, the axis of the antenna rotation shaft portion is set substantially parallel to the major axis direction of the offset reflector, and The longitudinal direction of the vehicle is set substantially parallel to the longitudinal direction of the vehicle.
ここに、「ほぼ平行」とは、平行である場合、
および誤差があつて厳密に平行でない場合でも実
質的に平行である効果がある場合をともに含むこ
とを意味する。 Here, "almost parallel" means parallel,
This means that even if there is an error and the parallelism is not strictly parallel, there is an effect of substantially parallelism.
放射給電部はオフセツト反射鏡の開口部の内方
に折り畳むことのできる構造であることが好まし
い。 Preferably, the radiant feeder has a structure that can be folded into the opening of the offset reflector.
オフセツトアンテナにおいて、そのオフセツト
反射鏡の長径方向にほぼ合わせた一つのアンテナ
回転軸をオフセツト反射鏡の裏面に設け、かつオ
フセツト反射鏡の長径方向を車両の前後方向に設
けたアンテナ構造を格納状態とすることにより、
有効径の大きなオフセツトアンテナを車両に搭載
したまま一般道路を移動することができる。
In an offset antenna, an antenna structure in which one antenna rotation axis approximately aligned with the long axis direction of the offset reflector is provided on the back surface of the offset reflector, and the long axis direction of the offset reflector is provided in the longitudinal direction of the vehicle is in a retracted state. By doing so,
It is possible to move on general roads with an offset antenna with a large effective diameter mounted on the vehicle.
本発明の一実施例を図面を参照して説明する。 An embodiment of the present invention will be described with reference to the drawings.
第１図は本発明第一実施例を車両の後方から見
た図である。第２図は第１図の側面図を示す。第
１図において、オフセツト反射鏡１は俯仰回転軸
３および俯仰駆動装置４を介して、方位回転台５
に支持され、方位回転軸６を中心として旋回する
構造である。副反射板７は給電部８とともにオフ
セツト反射鏡１の裏面側に取付けられた給電支柱
９に設置されている。方位回転台５は車両１０の
荷台上に搭載される。 FIG. 1 is a view of the first embodiment of the present invention viewed from the rear of the vehicle. FIG. 2 shows a side view of FIG. In FIG. 1, an offset reflector 1 is connected to an azimuth rotation table 5 via an elevation rotation shaft 3 and an elevation drive device 4.
It has a structure that is supported by and rotates around the azimuth rotation axis 6. The sub-reflection plate 7 is installed together with the power supply section 8 on a power supply column 9 attached to the back side of the offset reflector 1. The orientation rotary table 5 is mounted on the loading platform of the vehicle 10.
第１図の符号２の破線は、道路運送車両法によ
る車両の全高寸法の制限（3.8m以下）および車
幅寸法（2.5m以下）の限界線を示し、第２図の
符号１１は送受信装置コンテナを示す。 The dashed line numbered 2 in Figure 1 indicates the limit line for the overall height of the vehicle (3.8m or less) and the vehicle width (2.5m or less) according to the Road Transport Vehicle Law, and the number 11 in Figure 2 indicates the transmitting/receiving device. Indicates a container.
本発明の特徴は第１図において、オフセツト反
射鏡１はその長径軸の方向を車両の前後方向とな
るように設置し、短径軸の方向は破線２にて示す
車高および車幅制限寸法を有効利用できるように
ほぼ対角線方向に置く。オフセツト反射鏡の俯仰
回転軸３の軸線はオフセツト反射鏡の長径軸方向
とほぼ平行に配置する。 The feature of the present invention is that, in FIG. 1, the offset reflector 1 is installed so that its major axis is in the longitudinal direction of the vehicle, and its minor axis is aligned with the vehicle height and vehicle width restriction dimensions shown by broken lines 2. Place them almost diagonally so that they can be used effectively. The axis of the elevation rotation shaft 3 of the offset reflecting mirror is arranged substantially parallel to the major axis direction of the offset reflecting mirror.
俯仰駆動装置４は具体的にスクリユージヤツキ
を使用する。 The elevation drive device 4 specifically uses a screw jack.
上記構成の車両搭載型オフセツトアンテナはオ
フセツト反射鏡の有効径すなわち短径の大きさを
車幅制限の寸法以上にすることが可能である。例
えば道路運送車両法の全幅2.5m以下、全高3.8m
以下という制限にかかわらず、第１図のように反
射鏡の短径を傾斜させる構成ではオフセツト反射
鏡の有効径を2.5m以上にすることができ、3mま
たは反射鏡の可動範囲が狭くても差支えない場合
は3m以上の有効径が得られる。 In the vehicle-mounted offset antenna configured as described above, the effective diameter, that is, the short diameter of the offset reflector can be made larger than the vehicle width limit. For example, the total width is 2.5m or less and the total height is 3.8m under the Road Transport Vehicle Law.
Regardless of the following limitations, with the configuration in which the short axis of the reflector is inclined as shown in Figure 1, the effective diameter of the offset reflector can be increased to 2.5 m or more, and even if the movable range of the reflector is 3 m or narrow. If there is no problem, an effective diameter of 3 m or more can be obtained.
このオフセツト反射鏡は解体することがないの
で反射鏡の鏡面精度は製作時の精度を保つことが
できる。実際の操作上現地組立作業をほとんど行
わないので極めて短時間にアンテナを通信可能状
態にすることができ、特に緊急出動が要求される
車両搭載型アンテナに適した構成のものとなる。 Since this offset reflecting mirror does not need to be disassembled, the mirror surface precision of the reflecting mirror can be maintained at the time of manufacture. In actual operation, almost no on-site assembly work is required, so the antenna can be brought into a communicable state in an extremely short time, making it particularly suitable for vehicle-mounted antennas that require emergency dispatch.
第３図は本発明第二実施例の構造図である。こ
の構造は本発明の第二の特徴としてオフセツトア
ンテナを車両に搭載した場合に、第３図に示すよ
うに、副反射鏡２や給電部８とともに給電支柱９
を折り畳めることである。このようにすることに
よつて反射鏡の大きさをさらに大きくすることが
でき、また給電支柱９を複雑な構造にすることが
できる。 FIG. 3 is a structural diagram of a second embodiment of the present invention. This structure is the second feature of the present invention, and when the offset antenna is mounted on a vehicle, as shown in FIG.
can be folded. By doing so, the size of the reflecting mirror can be further increased, and the power feeding column 9 can have a complicated structure.
第４図は本発明の第三実施例の構造図である。
この構造は、オフセツト反射鏡の長径軸を車両の
前後方向に置き水平面に対して傾斜させるととも
に、俯仰回転軸３を水平かつ長径方向に設置す
る。第４図では、俯仰回転軸３の位置を明らかに
するために、オフセツト反射鏡１を天頂に向けて
いるように示されてきるが、車両の移動時には俯
仰角を低くし、また必要に応じて給電支柱９を第
３図のように折り畳むことにより車両の制限寸法
範囲内にて大きなパラボラアンテナの有効径を確
保することができる。 FIG. 4 is a structural diagram of a third embodiment of the present invention.
In this structure, the major axis of the offset reflector is placed in the longitudinal direction of the vehicle and is inclined with respect to the horizontal plane, and the elevation rotation axis 3 is installed horizontally and in the major axis direction. In Fig. 4, the offset reflector 1 is shown pointing toward the zenith in order to clarify the position of the elevation rotation axis 3, but when the vehicle is moving, the elevation angle should be lowered, and the elevation angle should be lowered when necessary. By folding the power feeding column 9 as shown in FIG. 3, a large effective diameter of the parabolic antenna can be secured within the limited size range of the vehicle.
〔発明の効果〕
本発明によれば、一般道路を自由に走行できる
車両に搭載されるオフセツトアンテナで反射鏡の
有効径を極めて大きく設計することができる。本
発明の装置では、交信性能がよい地上局アンテナ
を任意の地点に迅速に設置できる効果がある。[Effects of the Invention] According to the present invention, the effective diameter of the reflector can be designed to be extremely large in an offset antenna mounted on a vehicle that can freely travel on general roads. The device of the present invention has the advantage that a ground station antenna with good communication performance can be quickly installed at any location.
第１図は本発明第一実施例の背面図。第２図は
上記実施例の側面図。第３図は本発明の第二実施
例の側面図。第４図は本発明の第三実施例構造
図。第５図は第一従来例構造の側面図。第６図は
第二従来例構造の側面図。
１…オフセツト反射鏡、２…車両の車高および
車幅制限の限界線、３，１２…俯仰回転軸、４…
俯仰駆動装置、５…方位回転台、６…方位回転
軸、７…副反射鏡、８…給電部、９…給電支柱、
１０…車両、１１…送受信装置コンテナ。
FIG. 1 is a rear view of the first embodiment of the present invention. FIG. 2 is a side view of the above embodiment. FIG. 3 is a side view of a second embodiment of the invention. FIG. 4 is a structural diagram of a third embodiment of the present invention. FIG. 5 is a side view of the first conventional structure. FIG. 6 is a side view of the second conventional structure. DESCRIPTION OF SYMBOLS 1...Offset reflector, 2...Limit line of vehicle height and vehicle width restrictions, 3, 12...Elevation rotation axis, 4...
Elevation drive device, 5... Azimuth rotation table, 6... Azimuth rotation axis, 7... Sub-reflector, 8... Power feeding section, 9... Power feeding column,
10...Vehicle, 11...Transmitter/receiver container.
Claims (1)
と、 このオフセツト反射鏡裏面に取付けられた仰角
度変更用のアンテナ回転軸部と、 このアンテナ回転軸部を支持する方位回転台
と、 この方位回転台を搭載する車両と を備えた車両搭載型オフセツトアンテナにおい
て、 上記アンテナ回転軸部の軸線は上記オフセツト
反射鏡の長径方向とほぼ平行に設定され、 上記オフセツト反射鏡の長径方向が上記車両の
前後方向とほぼ平行に設定される ことを特徴とする車両搭載型オフセツトアンテ
ナ。 ２ 放射給電部はオフセツト反射鏡の開口部の内
方に折り畳むことのできる構造である特許請求の
範囲第１項に記載の車両搭載型オフセツトアンテ
ナ。[Scope of Claims] 1. A radiant power feeding section, an offset reflector facing the radiant power feeding section, an antenna rotation shaft for changing the elevation angle attached to the back surface of the offset reflector, and a rotation shaft of the antenna. In a vehicle-mounted offset antenna equipped with a supporting azimuth rotary table and a vehicle on which the azimuth rotary table is mounted, the axis of the antenna rotation shaft portion is set substantially parallel to the long axis direction of the offset reflector, and the above-mentioned A vehicle-mounted offset antenna characterized in that the major diameter direction of the offset reflector is set substantially parallel to the longitudinal direction of the vehicle. 2. The vehicle-mounted offset antenna according to claim 1, wherein the radiation feeding section has a structure that can be folded into the opening of the offset reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22179884A JPS61100005A (en) | 1984-10-22 | 1984-10-22 | On-vehicle type offset antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22179884A JPS61100005A (en) | 1984-10-22 | 1984-10-22 | On-vehicle type offset antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61100005A JPS61100005A (en) | 1986-05-19 |
| JPH0339402B2 true JPH0339402B2 (en) | 1991-06-13 |
Family
ID=16772361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22179884A Granted JPS61100005A (en) | 1984-10-22 | 1984-10-22 | On-vehicle type offset antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61100005A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63147013U (en) * | 1987-03-19 | 1988-09-28 | ||
| JP2583562B2 (en) * | 1988-03-16 | 1997-02-19 | 富士通株式会社 | Offset type antenna device |
| JP2607610B2 (en) * | 1988-04-08 | 1997-05-07 | 株式会社東芝 | Portable antenna device |
| JPH02270402A (en) * | 1989-04-12 | 1990-11-05 | Fujitsu Ltd | Antenna support structure for on-vehicle station for satellite communication |
| JPH0382913U (en) * | 1989-12-13 | 1991-08-23 | ||
| CA2202473A1 (en) * | 1994-10-24 | 1996-05-02 | Derek James Clark | Improvements in or relating to antenna mounts |
-
1984
- 1984-10-22 JP JP22179884A patent/JPS61100005A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61100005A (en) | 1986-05-19 |
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