JP2002158534A - Patch antenna - Google Patents
Patch antennaInfo
- Publication number
- JP2002158534A JP2002158534A JP2000350607A JP2000350607A JP2002158534A JP 2002158534 A JP2002158534 A JP 2002158534A JP 2000350607 A JP2000350607 A JP 2000350607A JP 2000350607 A JP2000350607 A JP 2000350607A JP 2002158534 A JP2002158534 A JP 2002158534A
- Authority
- JP
- Japan
- Prior art keywords
- patch antenna
- antenna
- patch
- gain
- parasitic element
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は自動車電話・携帯電
話等の不感地対策用として室内の壁面、天井等に取り付
けられる対移動局用アンテナとして使用するパッチ型ア
ンテナに関する。特に、前面の利得がそれほど必要でな
く、室内の角に対して大きな利得が必要なときに使用す
るパッチ型アンテナ、及びこのパッチ型アンテナにおい
て、背面からの不要電波の影響を受け難くしたパッチ型
アンテナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a patch-type antenna used as an antenna for a mobile station, which is mounted on a wall or ceiling in a room as a countermeasure for blind spots of a mobile phone, a mobile phone, or the like. In particular, a patch antenna used when the front gain is not so required and a large gain is required for the corners in the room, and a patch antenna that is hardly affected by unnecessary radio waves from the back in this patch antenna. Regarding antennas.
【０００２】[0002]
【従来の技術】図１は従来のパッチ型アンテナの構成を
示す断面図及び斜視図である。従来のパッチ型アンテナ
は幅ａ、奥行きｂの地板１上に誘電体基板を介して略中
央部分に１辺がＷ1の正方形で地板からの高さがｈ1の平
面パッチアンテナ２が配置してある。平面パッチアンテ
ナは地板、誘電体基板を貫通して裏面側の給電点３から
給電される。従来のパッチ型アンテナにおいて、例とし
てａ＝1.44λ、ｂ＝0.63λ、Ｗ1＝0.41λ、ｈ1＝0.025
λ（λ：波長）の時、水平面内の指向性は図２のように
なる。図２において上方（０°）は正面方向、下方（18
0°）は背面方向を示す。2. Description of the Related Art FIG. 1 is a sectional view and a perspective view showing the structure of a conventional patch antenna. Conventional patch type antenna width a, 1 side height from the base plate in a square W 1 at a substantially central portion through the dielectric substrate on the base plate 1 of the depth b has the planar patch antenna 2 h 1 arranged It is. The planar patch antenna is fed from the feed point 3 on the back side through the ground plane and the dielectric substrate. In the conventional patch antenna, for example, a = 1.44λ, b = 0.63λ, W 1 = 0.41λ, h 1 = 0.025
At λ (λ: wavelength), the directivity in the horizontal plane is as shown in FIG. In FIG. 2, the upper direction (0 °) is the front direction, and the lower direction (18 °).
0 °) indicates the rear direction.
【０００３】図３は従来の無給電素子を備えたパッチ型
アンテナの構成を示す斜視図である。従来の無給電素子
を備えたパッチ型アンテナは幅ａ、奥行きｂの地板１上
に誘電体基板を介して略中央部分に１辺がＷ1の正方形
の平面パッチアンテナ２を配置し、この平面パッチアン
テナと同一平面において両側に１辺がＷ2の正方形の無
給電素子４を設置してある。平面パッチアンテナは地
板、誘電体基板を貫通して裏面側の給電点３から給電さ
れる。FIG. 3 is a perspective view showing the configuration of a conventional patch antenna having a parasitic element. In a conventional patch-type antenna having a parasitic element, a square planar patch antenna 2 having a side of W 1 is disposed at a substantially central portion of a base plate 1 having a width a and a depth b via a dielectric substrate. A parasitic element 4 having a square shape of W 2 on one side is provided on both sides in the same plane as the patch antenna. The planar patch antenna is fed from the feed point 3 on the back side through the ground plane and the dielectric substrate.
【０００４】従来の無給電素子を備えたパッチ型アンテ
ナにおいて、例としてａ＝1.68λ、ｂ＝0.68λ、Ｗ1＝
0.42λ、Ｗ2＝0.37λ、平面パッチアンテナと無給電素
子の間隔＝0.13λの時、水平面内の指向性は図４のよう
になる。In a conventional patch-type antenna having a parasitic element, for example, a = 1.68λ, b = 0.68λ, and W 1 =
When 0.42λ, W 2 = 0.37λ, and the interval between the planar patch antenna and the parasitic element = 0.13λ, the directivity in the horizontal plane is as shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】壁面設置型アンテナの
場合、前面の利得は小さくてよく、部屋の角に対して大
きな利得があることが望ましい。また、屋外からの干渉
を阻止するためにはＦＢ比（正面方向の利得と背面方向
の利得の比）が大きい必要がある。従来のパッチ型アン
テナは、図２、４に示したようなパターンを示し、水平
面内の指向性は正面方向に最大の利得を有し、側面方向
の利得が十分ではない。本発明の目的は、側面方向の高
利得化及びＦＢ比の向上により、さらなる特性の改善を
図り、部屋の角においても自動車電話、携帯電話等の使
用が可能なパッチ型アンテナを提供することにある。In the case of a wall-mounted antenna, the front gain may be small, and it is desirable that the antenna has a large gain with respect to the corner of the room. Also, in order to prevent interference from outside, the FB ratio (the ratio of the gain in the front direction to the gain in the rear direction) needs to be large. The conventional patch-type antenna has a pattern as shown in FIGS. 2 and 4, and the directivity in the horizontal plane has the maximum gain in the front direction, and the gain in the side direction is not sufficient. SUMMARY OF THE INVENTION An object of the present invention is to provide a patch-type antenna capable of further improving characteristics by increasing the gain in the lateral direction and improving the FB ratio, and enabling use of a car phone, a mobile phone, and the like even in a corner of a room. is there.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、本発明においては、平面パッチアンテナと地板を備
えたパッチ型アンテナにおいて、平面パッチアンテナと
同一平面にない両側に２つの無給電素子を配置する。さ
らに、上記パッチ型アンテナ装置において、平面パッチ
アンテナ及び無給電素子の周辺部に金属製の箱形導体を
配置する。この際、箱形導体において、無給電素子の設
置された側壁の高さは、それと直交する側壁の高さより
も低くなっている。In order to solve the above-mentioned problems, the present invention provides a patch type antenna having a planar patch antenna and a ground plane, wherein two parasitic elements are provided on both sides which are not on the same plane as the planar patch antenna. Place. Further, in the above-mentioned patch-type antenna device, a metal box-shaped conductor is arranged around the planar patch antenna and the parasitic element. At this time, in the box-shaped conductor, the height of the side wall on which the parasitic element is installed is lower than the height of the side wall orthogonal to the parasitic element.
【０００７】[0007]
【発明の実施の形態】（実施例１）図５は本発明の実施
例１のパッチ型アンテナの構成を示す断面図及び斜視図
である。従来技術の図１、３と対応する部分に同一番号
を付けてある。本発明の実施例１のパッチ型アンテナ
は、幅ａ、奥行きｂの地板１上に、１辺がＷ1の正方形
で、地板からの高さがｈ1の平面パッチアンテナ２を装
着し、平面パッチアンテナの両側の前方に、１辺がＷ2
の正方形である無給電素子４が２素子、地板からの高さ
ｈ2の場所に平面パッチアンテナの中心と無給電素子の
中心の距離がＬとなるように設置されている。この時、
Ｗ1＞Ｗ2、ａ＞ｂの関係がある。このアンテナでは平面
パッチアンテナの両側の前方に無給電素子を設置するこ
とにより、無給電素子が導波器の役割を果たし、側面方
向の利得が大きくなる効果がもたらされる。例としてａ
＝1.44λ、ｂ＝0.63λ、Ｗ1＝0.41λ、Ｗ2＝0.33λ、ｈ
1＝0.025λ、ｈ2＝0.13λ、Ｌ＝0.44λの時の水平面内
指向性は図６のようになる。(Embodiment 1) FIG. 5 is a sectional view and a perspective view showing a configuration of a patch antenna according to Embodiment 1 of the present invention. Parts corresponding to those in FIGS. 1 and 3 of the prior art are denoted by the same reference numerals. In the patch-type antenna according to the first embodiment of the present invention, a planar patch antenna 2 having a square shape of W 1 and a height h 1 from the ground plate is mounted on a ground plate 1 having a width a and a depth b. One side is W 2 in front of both sides of the patch antenna.
Parasitic elements 4 are two elements which is a square, the center distance of the height h 2 of the location in the center and the parasitic element of the planar patch antenna from the ground plate is installed such that the L. At this time,
There is a relationship of W 1 > W 2 and a> b. In this antenna, the parasitic element is provided in front of both sides of the planar patch antenna, so that the parasitic element plays a role of a director, and the effect of increasing the gain in the side direction is brought about. For example a
= 1.44λ, b = 0.63λ, W 1 = 0.41λ, W 2 = 0.33λ, h
FIG. 6 shows the directivity in the horizontal plane when 1 = 0.025λ, h 2 = 0.13λ, and L = 0.44λ.
【０００８】図６を参照すると、本発明の実施例１のパ
ッチ型アンテナは正面方向の利得は減少するものの側面
方向の利得は増加していることから、従来のパッチ型ア
ンテナに比べるとＦＢ比は同程度ではあるが側面方向の
利得向上が得られている。また、本発明は２つの無給電
素子の地板からの高さｈ2を変えることにより水平面内
の指向性を変えて自動車電話、携帯電話等の使用が可能
な範囲を変えることができる。なお、上記実施例では２
つの無給電素子を平面パッチアンテナの両側の前方に設
けているが、２つの無給電素子を平面パッチアンテナの
両側の後方に設けても同様に側面方向の利得向上を図る
ことができる。（実施例２）図７は本発明の実施例２の
パッチ型アンテナの構成を示す断面図及び斜視図であ
る。Referring to FIG. 6, the patch-type antenna according to the first embodiment of the present invention has a lower FB ratio than a conventional patch-type antenna because the gain in the front direction decreases but the gain in the side direction increases. Is similar, but the gain in the lateral direction is improved. Further, according to the present invention, by changing the height h2 of the two parasitic elements from the ground plane, the directivity in the horizontal plane can be changed to change the usable range of a mobile phone, a mobile phone, or the like. In the above embodiment, 2
Although two parasitic elements are provided in front of both sides of the planar patch antenna, the gain in the lateral direction can be similarly improved by providing two parasitic elements in the rear of both sides of the planar patch antenna. (Embodiment 2) FIG. 7 is a sectional view and a perspective view showing the configuration of a patch antenna according to Embodiment 2 of the present invention.
【０００９】実施例２のパッチ型アンテナは、実施例１
のパッチ型アンテナにおいて、パッチアンテナ２および
無給電素子４の周辺部に無給電素子が存在する方向の側
面の高さｔ1、もう一方の側面の高さｔ2である金属製の
箱型導体を設ける。その時の地板の幅ａ2、奥行きをｂ2
とすると、Ｗ1＞Ｗ 2、ａ2 ＞ｂ2、ｔ1 ＜ｔ2 の関係が
ある。ａ2＝1.27λ 、ｂ2＝0.46λ、Ｗ1＝0.41λ、Ｗ2
＝0.33λ、ｈ1＝0.025λ、ｈ2＝0.13λ、Ｌ＝0.44λ、
ｔ1＝0.18λ、ｔ2＝0.20λの時の水平面内指向性は図８
のようになる。箱型導体を配置し、無給電素子のある側
の側面の高さをもう一方の側面よりも低くすることによ
り、図８に示されたように実施例１のパッチ型アンテナ
に比べＦＢ比を改善しつつ、側面方向の利得がより大き
くなっている。それに加えて、地板の幅、奥行きともに
0.18λ短縮されており、アンテナの小型化も実現されて
いる。The patch antenna according to the second embodiment is similar to the patch antenna according to the first embodiment.
In the patch-type antenna described above, a metal box-shaped conductor having a height t 1 on the side surface in the direction in which the parasitic element exists around the patch antenna 2 and the parasitic element 4 and a height t 2 on the other side surface Is provided. The width a 2 of the main plate at that time and the depth b 2
Then, there is a relationship of W 1 > W 2 , a 2 > b 2 , and t 1 <t 2 . a 2 = 1.27λ , B 2 = 0.46λ, W 1 = 0.41λ, W 2
= 0.33λ, h 1 = 0.025λ, h 2 = 0.13λ, L = 0.44λ,
FIG. 8 shows the directivity in the horizontal plane when t 1 = 0.18λ and t 2 = 0.20λ.
become that way. By disposing a box-shaped conductor and making the side of the side where the parasitic element is located lower than the other side, the FB ratio can be reduced as compared with the patch-type antenna of the first embodiment as shown in FIG. While improving, the lateral gain is greater. In addition, both the width and depth of the base plate
It has been shortened by 0.18λ, and the antenna can be downsized.
【００１０】[0010]
【発明の効果】以上説明したように、本発明によれば平
面パッチアンテナと同一平面にない両側に２つの無給電
素子を配置したので、この無給電素子が導波器として機
能し、水平面内の側面方向の利得が向上できる。また、
平面パッチアンテナと無給電素子の周辺部に金属製の箱
体を配置することにより側面方向の利得の向上ならびに
ＦＢ比の改善が達成でき、加えてアンテナの小型化も実
現される。As described above, according to the present invention, since two parasitic elements are arranged on both sides which are not on the same plane as the planar patch antenna, the parasitic elements function as a director and are arranged in a horizontal plane. Can be improved in the lateral direction. Also,
By arranging a metal box around the planar patch antenna and the parasitic element, the gain in the lateral direction and the FB ratio can be improved, and the size of the antenna can be reduced.
【図１】従来のパッチ型アンテナの構成を示す断面図及
び斜視図。FIG. 1 is a cross-sectional view and a perspective view showing a configuration of a conventional patch antenna.
【図２】従来のパッチ型アンテナの水平面内指向性を示
す図。FIG. 2 is a diagram showing directivity in a horizontal plane of a conventional patch antenna.
【図３】従来の無給電素子を備えたパッチ型アンテナの
構成を示す斜視図。FIG. 3 is a perspective view showing a configuration of a conventional patch antenna including a parasitic element.
【図４】従来の無給電素子を備えたパッチ型アンテナの
水平面内指向性を示す図。FIG. 4 is a diagram showing directivity in a horizontal plane of a patch-type antenna provided with a conventional parasitic element.
【図５】本発明の実施例１のパッチ型アンテナの構成を
示す断面図及び斜視図。FIG. 5 is a cross-sectional view and a perspective view illustrating a configuration of a patch antenna according to the first embodiment of the present invention.
【図６】本発明の実施例１のパッチ型アンテナの水平面
内指向性を示す図。FIG. 6 is a diagram showing directivity in a horizontal plane of the patch antenna according to the first embodiment of the present invention.
【図７】本発明の実施例２のパッチ型アンテナの構成を
示す断面図及び斜視図。FIG. 7 is a cross-sectional view and a perspective view illustrating a configuration of a patch antenna according to a second embodiment of the present invention.
【図８】本発明の実施例２のパッチ型アンテナの水平面
内指向性を示す図。FIG. 8 is a diagram showing directivity in a horizontal plane of the patch antenna according to the second embodiment of the present invention.
１ 地板 ２ 平面パッチアンテナ ３ 給電点 ４ 無給電素子 ５ 金属製箱 DESCRIPTION OF SYMBOLS 1 Ground plate 2 Planar patch antenna 3 Feeding point 4 Parasitic element 5 Metal box
フロントページの続き (72)発明者 恵比根 佳雄 東京都千代田区永田町二丁目11番１号 株 式会社エヌ・ティ・ティ・ドコモ内 (72)発明者 新井 宏之 神奈川県横浜市旭区今宿東町615−11 Ｆターム(参考） 5J020 AA03 BA06 BC13 DA03 DA04 5J021 AA03 AA09 AB06 BA01 GA05 GA08 HA05 HA10 5J045 AA21 AA26 DA10 EA07 HA06 MA04 NA01 Continuing on the front page (72) Inventor Yoshio Ebine 2-1-1, Nagatacho, Chiyoda-ku, Tokyo Inside NTT DoCoMo, Inc. 11 F term (reference) 5J020 AA03 BA06 BC13 DA03 DA04 5J021 AA03 AA09 AB06 BA01 GA05 GA08 HA05 HA10 5J045 AA21 AA26 DA10 EA07 HA06 MA04 NA01
Claims (4)
型アンテナにおいて、平面パッチアンテナと同一平面に
ない両側に２つの無給電素子を配置したことを特徴とす
るパッチ型アンテナ。1. A patch antenna comprising a planar patch antenna and a ground plane, wherein two parasitic elements are arranged on both sides which are not on the same plane as the planar patch antenna.
て、 平面パッチアンテナの両側の前方に２つの無給電素子を
配置したことを特徴とするパッチ型アンテナ。2. A patch antenna according to claim 1, wherein two parasitic elements are arranged in front of both sides of the planar patch antenna.
において、 平面パッチアンテナ及び無給電素子の周辺部に金属製の
箱型導体を配置したことを特徴とするパッチ型アンテ
ナ。3. The patch type antenna according to claim 1, wherein a metal box-shaped conductor is arranged around the planar patch antenna and the parasitic element.
て、 無給電素子の設置された方向の側壁の高さがそれと直交
する方向の側壁の高さよりも低いことを特徴とするパッ
チ型アンテナ。4. A patch antenna according to claim 3, wherein the height of the side wall in the direction in which the parasitic element is installed is lower than the height of the side wall in the direction orthogonal to the parasitic element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000350607A JP2002158534A (en) | 2000-11-17 | 2000-11-17 | Patch antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000350607A JP2002158534A (en) | 2000-11-17 | 2000-11-17 | Patch antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002158534A true JP2002158534A (en) | 2002-05-31 |
Family
ID=18823804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000350607A Pending JP2002158534A (en) | 2000-11-17 | 2000-11-17 | Patch antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002158534A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006237781A (en) * | 2005-02-23 | 2006-09-07 | Univ Of Tokyo | Array antenna |
| JP2007159091A (en) * | 2005-12-07 | 2007-06-21 | Compal Electronic Inc | Planar antenna structure |
| JP2008252857A (en) * | 2006-07-12 | 2008-10-16 | Toto Ltd | High-frequency sensor device |
| WO2013121673A1 (en) | 2012-02-16 | 2013-08-22 | 古河電気工業株式会社 | Wide-angle antenna and array antenna |
| CN111788741A (en) * | 2018-02-23 | 2020-10-16 | 株式会社友华 | Patch antenna and vehicle-mounted antenna device |
| CN112005435A (en) * | 2018-04-24 | 2020-11-27 | Ａｇｃ株式会社 | Antenna for vehicle, window glass with antenna for vehicle, and antenna system |
| US11631936B2 (en) * | 2018-08-02 | 2023-04-18 | Murata Manufacturing Co., Ltd. | Antenna device |
| JP7292800B2 (en) | 2019-06-27 | 2023-06-19 | 日本無線株式会社 | Planar array antenna for both transmission and reception |
-
2000
- 2000-11-17 JP JP2000350607A patent/JP2002158534A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4565186B2 (en) * | 2005-02-23 | 2010-10-20 | 国立大学法人 東京大学 | Array antenna |
| JP2006237781A (en) * | 2005-02-23 | 2006-09-07 | Univ Of Tokyo | Array antenna |
| JP2007159091A (en) * | 2005-12-07 | 2007-06-21 | Compal Electronic Inc | Planar antenna structure |
| JP2008252857A (en) * | 2006-07-12 | 2008-10-16 | Toto Ltd | High-frequency sensor device |
| WO2013121673A1 (en) | 2012-02-16 | 2013-08-22 | 古河電気工業株式会社 | Wide-angle antenna and array antenna |
| US11799208B2 (en) | 2018-02-23 | 2023-10-24 | Yokowo Co., Ltd. | Patch antenna and antenna device for vehicle |
| CN111788741A (en) * | 2018-02-23 | 2020-10-16 | 株式会社友华 | Patch antenna and vehicle-mounted antenna device |
| CN111788741B (en) * | 2018-02-23 | 2024-04-16 | 株式会社友华 | Patch antenna and in-vehicle antenna device |
| JPWO2019163521A1 (en) * | 2018-02-23 | 2021-02-04 | 株式会社ヨコオ | Patch antenna and in-vehicle antenna device |
| EP3758147A4 (en) * | 2018-02-23 | 2021-11-24 | Yokowo Co., Ltd. | Patch antenna and vehicle-mounted antenna device |
| JP7231608B2 (en) | 2018-02-23 | 2023-03-01 | 株式会社ヨコオ | Patch antenna and vehicle antenna device |
| JPWO2019208453A1 (en) * | 2018-04-24 | 2021-05-13 | Ａｇｃ株式会社 | Vehicle antennas, windowpanes with vehicle antennas and antenna systems |
| JP7298600B2 (en) | 2018-04-24 | 2023-06-27 | Ａｇｃ株式会社 | Vehicle antenna, window glass with vehicle antenna and antenna system |
| CN112005435A (en) * | 2018-04-24 | 2020-11-27 | Ａｇｃ株式会社 | Antenna for vehicle, window glass with antenna for vehicle, and antenna system |
| US11631936B2 (en) * | 2018-08-02 | 2023-04-18 | Murata Manufacturing Co., Ltd. | Antenna device |
| JP7292800B2 (en) | 2019-06-27 | 2023-06-19 | 日本無線株式会社 | Planar array antenna for both transmission and reception |
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