JPH0310407A - Radome for planer antenna - Google Patents
Radome for planer antennaInfo
- Publication number
- JPH0310407A JPH0310407A JP14476289A JP14476289A JPH0310407A JP H0310407 A JPH0310407 A JP H0310407A JP 14476289 A JP14476289 A JP 14476289A JP 14476289 A JP14476289 A JP 14476289A JP H0310407 A JPH0310407 A JP H0310407A
- Authority
- JP
- Japan
- Prior art keywords
- radome
- antenna
- planar antenna
- lens
- planer 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.)
- Pending
Links
- 239000003989 dielectric material Substances 0.000 claims abstract description 9
- 230000005855 radiation Effects 0.000 abstract description 13
- 239000004020 conductor Substances 0.000 abstract description 12
- 239000000126 substance Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は平面アンテナに関する。[Detailed description of the invention] "Industrial application field" The present invention relates to a planar antenna.
「従来の技術」
平面アンテナは日射、風雪からアンテナを保護するため
レードームで覆って用いるのが一般的である。従来のレ
ードームは電波の放射特性に影響を与えないように、誘
電率の小さな材質を用い、かつ、その厚さもできる限り
薄いものを用いていた。``Prior Art'' Planar antennas are generally covered with a radome to protect them from solar radiation, wind, and snow. Conventional radomes use materials with a low dielectric constant and are as thin as possible so as not to affect radio wave radiation characteristics.
ｒ発明が解決しようとする課題Ｊ
しかしながら、上記の従来の平面アンテナ用レードーム
は単に風雪を防ぐためのものであり、平面アンテナの放
射指向性を変化させることはできなかった。このため、
平面アンテナの放射指向性はアンテナ素子自体の構造等
により決定されてしまい、放射指向性を任意に設定する
ことは困難であった。rProblems to be Solved by the Invention J However, the above-mentioned conventional radome for a planar antenna is simply for preventing wind and snow, and cannot change the radiation directivity of the planar antenna. For this reason,
The radiation directivity of a planar antenna is determined by the structure of the antenna element itself, and it has been difficult to set the radiation directivity arbitrarily.
本発明は、上記の！＊ｊ！Ｉに鑑みなされたものであり
、その目的とするところは、平面アンテナの放射指向性
を比教的自由に変化させ設定することができる平面アン
テナ用レードームを提供することにある。The present invention is based on the above! *j! The purpose of this invention is to provide a radome for a planar antenna in which the radiation directivity of the planar antenna can be changed and set as desired.
「課題を解決するための手段Ｊ
上記の目的を達成するため、本発明では、平面アンテナ
の上方を覆うレードームを誘電体で構成し、そのレード
ームの厚さを場所により変化させて電波レンズとしたこ
とを特徴とする平面アンテナ用レードームが提供される
。``Means for Solving the Problems J'' In order to achieve the above object, in the present invention, a radome that covers the top of the planar antenna is made of a dielectric material, and the thickness of the radome is changed depending on the location to form a radio wave lens. A radome for a planar antenna is provided.
「作用」
上記のように構成された平面アンテナ用レードームでは
、レードーム自体が誘電体レンズを構成し、平面アンテ
ナから放射された電磁波はレードームの界面で屈折し、
放射方向を変えて外部に放射される。"Operation" In the radome for a planar antenna configured as described above, the radome itself constitutes a dielectric lens, and the electromagnetic waves radiated from the planar antenna are refracted at the interface of the radome.
The radiation direction is changed and the radiation is emitted to the outside.
「実施例」 本発明の実施例について図面を参照し説明する。"Example" Embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の第１の実施例を示す縦断面図、第２図
は平面図である。略正方形をしたプリント基板１上に、
円板形状をしたパッチ導体２が設けられ、平面アンテナ
３を楕成している。平面アンテナ３は、板状で厚みのあ
るレードーム４により覆われている。レードーム４は誘
電体で形成され、バッチ導体２上方のレードーム下面４
人は円錐状にえぐり取られた形状をなし、円錐空間５を
なしている。レードーム４の上面４Ｂは平面に形成され
ているのでバッチ導体２上方のレードーム４はその厚さ
が場所により変化する電波レンズをなしている。FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, and FIG. 2 is a plan view. On the approximately square printed circuit board 1,
A disk-shaped patch conductor 2 is provided, and a planar antenna 3 is formed into an ellipse. The planar antenna 3 is covered by a thick plate-shaped radome 4. The radome 4 is formed of a dielectric material, and has a lower surface 4 of the radome above the batch conductor 2.
The person has a hollowed-out conical shape, forming a conical space 5. Since the upper surface 4B of the radome 4 is formed flat, the radome 4 above the batch conductor 2 forms a radio wave lens whose thickness varies depending on the location.
このため、バッチ導体２から上方に垂直方向に放射され
た電磁波６は、円錐空間５とレードーム下面４Ａの界面
及びレードーム上面４Ｂと外部空間の界面において屈折
し、傾斜した方向に進む電磁波７として外部に放射され
る。屈折率ｎは、レードーム４を構成する誘電体の比誘
電率をε１として、ｎ＝（ε、）ｌ／！で与えられる。Therefore, the electromagnetic waves 6 radiated vertically upward from the batch conductor 2 are refracted at the interface between the conical space 5 and the lower surface 4A of the radome, and the interface between the upper surface 4B of the radome and the external space, and are externalized as electromagnetic waves 7 traveling in an inclined direction. is radiated to. The refractive index n is n=(ε,)l/!, where ε1 is the relative permittivity of the dielectric material constituting the radome 4. is given by
第３図は垂直面内での放射指向性を示す図である。レー
ドームで屈折させない従来の平面アンテナでは、図中に
破線で示す様に鉛直方向に上方に向かうローブ９を示す
のに対し、本実施例では、図中に実線で示す様に、鉛直
線に対して斜め方向に向かうロー１８とすることができ
る。FIG. 3 is a diagram showing radiation directivity in a vertical plane. In a conventional planar antenna that is not refracted by a radome, the lobe 9 is directed upward in the vertical direction as shown by the broken line in the figure, but in this embodiment, the lobe 9 is directed upward in the vertical direction as shown by the solid line in the figure. The row 18 may be directed diagonally.
第４図は第２の実施例を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing the second embodiment.
この実施例では、レードーム２４の下面２４Ａが円錐面
に形成されているばかりではなく、上面２４Ｂも円錐面
に形成されている。そして、上面２４Ｂと下面２４Ａの
円錐面の鉛直線に対する角度を異にし、レードーム２４
の厚さが場所により変化する電波レンズを楕成している
１本実施例ではパッチ導体２から上方に放射される電磁
波２６をより大きく屈折させ略水平方向に進む電波２７
として放射することができ・、第５図に示す様に、ロー
ブ２８が略水平になるまでその垂直面での放射指向性を
変化させることができる。このため、平面アンテナ２３
を無指向性のアンテナとして作動させることができる。In this embodiment, not only the lower surface 24A of the radome 24 is formed into a conical surface, but also the upper surface 24B is formed into a conical surface. Then, the angles of the conical surfaces of the upper surface 24B and the lower surface 24A with respect to the vertical line are made different, and the radome 24
In this embodiment, an electromagnetic wave 26 radiated upward from the patch conductor 2 is refracted to a greater extent, and a radio wave 27 traveling in a substantially horizontal direction is formed.
As shown in FIG. 5, the radiation directivity in the vertical plane can be changed until the lobe 28 becomes approximately horizontal. For this reason, the planar antenna 23
can be operated as an omnidirectional antenna.
なお、従来の平面アンテナでのローブ２９を破線で図中
に示す。Note that the lobe 29 of the conventional planar antenna is shown in the figure by a broken line.
第６図は第３の実施例を示す縦断面図であり、第７図は
第６図のＡ−Ａ線断面図である。この実施例では、レー
ドーム３４の上面３４Ｂは水平面に形成されているが、
下面３４Ａが球面の一部をなすように形成されている。FIG. 6 is a longitudinal sectional view showing the third embodiment, and FIG. 7 is a sectional view taken along line A--A in FIG. 6. In this embodiment, the upper surface 34B of the radome 34 is formed in a horizontal plane;
The lower surface 34A is formed as a part of a spherical surface.
そして、下面３４Ａを構成する球面の中心点がパッチ導
体２の中心から第６図左方にずれた位置に形成され、レ
ードーム３４は水平面に対して傾斜した凸レンズ状の形
状をなしている０本実施例では、パッチ導体２から上方
に放射される電磁波３６は傾いた凸レンズ状のレードー
ム３４により所定方向に曲げられ、所定方向に進む電波
３７として放射される。このため、第８図に示す様に、
ローブ３８はレードーム３４がなす凸レンズの方向に対
応した特定の方向に向いたものとなり、特定の方向に集
束した電波を放射することができるようになる。なお、
従来の平面アンテナでのローブ３９を破線で図中に示し
ている。The center point of the spherical surface constituting the lower surface 34A is formed at a position shifted from the center of the patch conductor 2 to the left in FIG. In the embodiment, an electromagnetic wave 36 radiated upward from the patch conductor 2 is bent in a predetermined direction by a radome 34 in the shape of an inclined convex lens, and is emitted as a radio wave 37 traveling in a predetermined direction. Therefore, as shown in Figure 8,
The lobe 38 is oriented in a specific direction corresponding to the direction of the convex lens formed by the radome 34, and can emit radio waves focused in a specific direction. In addition,
Lobes 39 in a conventional planar antenna are shown in the figure by broken lines.
以上説明したように、レードーム４．２４．３４に誘電
体を用いて電波レンズを楕成し、そのレンズ形状を種々
に変えることにより、本来単一な指向性を有する平面ア
ンテナの放射特性を、無指向性にしたり、傾斜させたり
、特定の方向に集束させた鋭い指向性を有するものとし
たりすることができた。As explained above, by using a dielectric material in the radome 4.24.34 to form an elliptical radio wave lens, and by changing the shape of the lens variously, the radiation characteristics of a planar antenna, which originally has a single directivity, can be improved. It could be non-directional, tilted, or sharply focused in a specific direction.
また、前記実施例では、パッチ導体２の上方に空間５，
２５．３５を設けたが、該空間５，２５゜３５にレード
ーム４．２４．３４と誘電率の異なる誘電体を充填して
もよい。Further, in the above embodiment, a space 5 is provided above the patch conductor 2;
25.35 is provided, but the space 5, 25.35 may be filled with a dielectric material having a dielectric constant different from that of the radome 4.24.34.
さらに、レードーム自体を単一の誘電体で構成するので
はなく、誘電率の異なった２種以上の誘電体を組合わせ
て電波レンズを構成してもよい。Furthermore, instead of constructing the radome itself from a single dielectric material, the radio wave lens may be constructed by combining two or more types of dielectric materials with different dielectric constants.
また、平面アンテナは円形のバッチ導体アンテすに限定
されるものではなく、他のバッチ型、スロット型、ライ
ン型など種々の平面アンテナに適用することができる。Further, the planar antenna is not limited to a circular batch conductor antenna, and can be applied to various other types of planar antennas such as batch type, slot type, and line type.
また、受信アンテナとしても適用できることは明らかで
ある。It is clear that it can also be applied as a receiving antenna.
「発明の効果」
本発明は、上記のように構成されレードームを電波レン
ズとして構成するものであるから、本来単一指向性を示
す平面アンテナを、無指向性ほか種々の指向性を有する
アンテナとして構成することができるという効果がある
。"Effects of the Invention" Since the present invention is configured as described above and the radome is configured as a radio wave lens, a planar antenna which originally exhibits unidirectionality can be used as an antenna having various directivity including omnidirectionality. It has the advantage of being configurable.
２３．３３．、、平面アンテナ、 ４．２４，３４．。23.33. ,,Planar antenna, 4.24,34. .
、レードーム、 ４Ａ、、、下面（円錐面）、 ４Ｂ、
、。, radome, 4A, , lower surface (conical surface), 4B,
,.
上面、 ８００．ローブ。Top surface, 800. robe.
図面は本発明の実施例を示し、第１図は第１の実施例を
示す縦断面図、第２図は平面図、第３図は垂直面内での
放射指向性を示す指向性特性図であり、第４図は第２の
実施例を示す縦断面図、第５図は指向性特性図、第６図
は第３の実施例を示す縦断面図、第７図は第６図のＡ−
Ａ線断面図、第８図は指向性特性図である。
１９３．プリント基板、 ２１．、パッチ導体、 ３゜
−２９
図The drawings show embodiments of the present invention; FIG. 1 is a longitudinal sectional view showing the first embodiment, FIG. 2 is a plan view, and FIG. 3 is a directivity characteristic diagram showing radiation directivity in a vertical plane. 4 is a longitudinal sectional view showing the second embodiment, FIG. 5 is a directional characteristic diagram, FIG. 6 is a longitudinal sectional view showing the third embodiment, and FIG. 7 is a longitudinal sectional view showing the second embodiment. A-
The A-line sectional view and FIG. 8 are directional characteristic diagrams. 193. Printed circuit board, 21. , patch conductor, 3°-29 Fig.
Claims (1)
、そのレードームの厚さを場所により変化させて電波レ
ンズとしたことを特徴とする平面アンテナ用レードーム
。A radome for a flat antenna, characterized in that the radome covering the top of the flat antenna is made of a dielectric material, and the thickness of the radome is changed depending on the location to form a radio wave lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14476289A JPH0310407A (en) | 1989-06-07 | 1989-06-07 | Radome for planer antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14476289A JPH0310407A (en) | 1989-06-07 | 1989-06-07 | Radome for planer antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0310407A true JPH0310407A (en) | 1991-01-18 |
Family
ID=15369814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14476289A Pending JPH0310407A (en) | 1989-06-07 | 1989-06-07 | Radome for planer antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0310407A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998054788A1 (en) * | 1997-05-30 | 1998-12-03 | Robert Bosch Gmbh | Antenna for high frequency radio signal transmission |
| JP2002217638A (en) * | 2001-01-23 | 2002-08-02 | Mitsubishi Electric Corp | Antenna unit |
| WO2006049068A1 (en) * | 2004-11-08 | 2006-05-11 | Matsushita Electric Industrial Co., Ltd. | Antenna assembly and wireless communication system employing same |
| JP2007518325A (en) * | 2004-01-15 | 2007-07-05 | エリクソン エービー | Coating for microwave antenna |
| WO2007100001A1 (en) * | 2006-02-28 | 2007-09-07 | Fujitsu Limited | Antenna device, electronic device and antenna cover |
| JP2008252803A (en) * | 2007-03-30 | 2008-10-16 | National Institute Of Information & Communication Technology | Functional antenna device and radio system employing the same |
| JP2009218993A (en) * | 2008-03-12 | 2009-09-24 | Nippon Dengyo Kosaku Co Ltd | Antenna device and array antenna |
| JP2010141566A (en) * | 2008-12-11 | 2010-06-24 | Denso Corp | Dielectric loaded antenna |
| JP2011514121A (en) * | 2008-03-12 | 2011-04-28 | ザ・ボーイング・カンパニー | Scanning angle enhancement lens of phased array antenna |
| US7952534B2 (en) | 2004-03-31 | 2011-05-31 | Toto Ltd. | Microstrip antenna |
| JP2012522423A (en) * | 2009-03-26 | 2012-09-20 | ザ・ボーイング・カンパニー | High-frequency beam steering using a negative refractive index metamaterial lens |
| WO2016104561A1 (en) * | 2014-12-25 | 2016-06-30 | 株式会社デンソー | Cover member having curved surface and radar device comprising said cover member |
| WO2016104575A1 (en) * | 2014-12-26 | 2016-06-30 | 株式会社デンソー | Cover member having plurality of surfaces and radar device comprising said cover member |
| JP2018078376A (en) * | 2016-11-07 | 2018-05-17 | パナソニックＩｐマネジメント株式会社 | Radio wave sensor and lighting fixture |
| JP6484688B1 (en) * | 2017-11-09 | 2019-03-13 | 株式会社東海理化電機製作所 | Radar having radio wave transmission parts for vehicles |
| WO2019198662A1 (en) * | 2018-04-12 | 2019-10-17 | パナソニックＩｐマネジメント株式会社 | Antenna device |
| KR20200006231A (en) * | 2018-07-10 | 2020-01-20 | 광주과학기술원 | Radar cover |
| WO2020066453A1 (en) * | 2018-09-27 | 2020-04-02 | 株式会社村田製作所 | Antenna device and communication device |
| US11962081B2 (en) | 2019-03-07 | 2024-04-16 | Mitsubishi Electric Corporation | Antenna device |
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| JPH02262703A (en) * | 1989-04-03 | 1990-10-25 | Yamatake Honeywell Co Ltd | Microstrip antenna provided with radome |
| JPH02305002A (en) * | 1989-05-18 | 1990-12-18 | Murata Mfg Co Ltd | Antenna system |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6310587B1 (en) | 1997-05-30 | 2001-10-30 | Robert Bosch Gmbh | Antenna for high frequency radio signal transmission |
| WO1998054788A1 (en) * | 1997-05-30 | 1998-12-03 | Robert Bosch Gmbh | Antenna for high frequency radio signal transmission |
| JP2002217638A (en) * | 2001-01-23 | 2002-08-02 | Mitsubishi Electric Corp | Antenna unit |
| JP2007518325A (en) * | 2004-01-15 | 2007-07-05 | エリクソン エービー | Coating for microwave antenna |
| US7952534B2 (en) | 2004-03-31 | 2011-05-31 | Toto Ltd. | Microstrip antenna |
| WO2006049068A1 (en) * | 2004-11-08 | 2006-05-11 | Matsushita Electric Industrial Co., Ltd. | Antenna assembly and wireless communication system employing same |
| WO2007100001A1 (en) * | 2006-02-28 | 2007-09-07 | Fujitsu Limited | Antenna device, electronic device and antenna cover |
| JP5067363B2 (en) * | 2006-02-28 | 2012-11-07 | 富士通株式会社 | ANTENNA DEVICE AND ELECTRONIC DEVICE |
| US8068059B2 (en) | 2006-02-28 | 2011-11-29 | Fujitsu Limited | Antenna device, electronic device and antenna cover |
| JP2008252803A (en) * | 2007-03-30 | 2008-10-16 | National Institute Of Information & Communication Technology | Functional antenna device and radio system employing the same |
| JP2011514121A (en) * | 2008-03-12 | 2011-04-28 | ザ・ボーイング・カンパニー | Scanning angle enhancement lens of phased array antenna |
| JP2009218993A (en) * | 2008-03-12 | 2009-09-24 | Nippon Dengyo Kosaku Co Ltd | Antenna device and array antenna |
| JP2010141566A (en) * | 2008-12-11 | 2010-06-24 | Denso Corp | Dielectric loaded antenna |
| JP2012522423A (en) * | 2009-03-26 | 2012-09-20 | ザ・ボーイング・カンパニー | High-frequency beam steering using a negative refractive index metamaterial lens |
| WO2016104561A1 (en) * | 2014-12-25 | 2016-06-30 | 株式会社デンソー | Cover member having curved surface and radar device comprising said cover member |
| JP2016121959A (en) * | 2014-12-25 | 2016-07-07 | 株式会社日本自動車部品総合研究所 | Radar device and cover member |
| US10819026B2 (en) | 2014-12-25 | 2020-10-27 | Denso Corporation | Cover member having curved surfaces, and radar apparatus incorporating the cover member |
| WO2016104575A1 (en) * | 2014-12-26 | 2016-06-30 | 株式会社デンソー | Cover member having plurality of surfaces and radar device comprising said cover member |
| JP2016125883A (en) * | 2014-12-26 | 2016-07-11 | 株式会社日本自動車部品総合研究所 | Rader system and cover member |
| US11637366B2 (en) | 2014-12-26 | 2023-04-25 | Denso Corporation | Cover member having plurality of faces, and radar apparatus provided with the cover member |
| JP2018078376A (en) * | 2016-11-07 | 2018-05-17 | パナソニックＩｐマネジメント株式会社 | Radio wave sensor and lighting fixture |
| JP2019086452A (en) * | 2017-11-09 | 2019-06-06 | 株式会社東海理化電機製作所 | Radar having radio wave transmitting component for vehicles |
| WO2019093021A1 (en) * | 2017-11-09 | 2019-05-16 | 株式会社東海理化電機製作所 | Vehicular radio wave transmission component |
| JP6484688B1 (en) * | 2017-11-09 | 2019-03-13 | 株式会社東海理化電機製作所 | Radar having radio wave transmission parts for vehicles |
| WO2019198662A1 (en) * | 2018-04-12 | 2019-10-17 | パナソニックＩｐマネジメント株式会社 | Antenna device |
| KR20200006231A (en) * | 2018-07-10 | 2020-01-20 | 광주과학기술원 | Radar cover |
| WO2020066453A1 (en) * | 2018-09-27 | 2020-04-02 | 株式会社村田製作所 | Antenna device and communication device |
| CN112771728A (en) * | 2018-09-27 | 2021-05-07 | 株式会社村田制作所 | Antenna device and communication device |
| US11973279B2 (en) | 2018-09-27 | 2024-04-30 | Murata Manufacturing Co., Ltd. | Antenna device and communication apparatus |
| US11962081B2 (en) | 2019-03-07 | 2024-04-16 | Mitsubishi Electric Corporation | Antenna device |
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