JPH0297102A - Plane antenna equipment - Google Patents
Plane antenna equipmentInfo
- Publication number
- JPH0297102A JPH0297102A JP25034788A JP25034788A JPH0297102A JP H0297102 A JPH0297102 A JP H0297102A JP 25034788 A JP25034788 A JP 25034788A JP 25034788 A JP25034788 A JP 25034788A JP H0297102 A JPH0297102 A JP H0297102A
- Authority
- JP
- Japan
- Prior art keywords
- dielectric plate
- radiation elements
- distance
- radiating element
- resonance frequency
- 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
- 230000005855 radiation Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 230000005684 electric field Effects 0.000 abstract description 2
- 230000001939 inductive effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 8
- 239000004020 conductor Substances 0.000 description 2
- 238000001259 photo etching Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、衛星通信、レーダ等の分野で電波を送信あ
るいは受信する平面アンテナ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flat antenna device for transmitting or receiving radio waves in fields such as satellite communication and radar.
第９図は従来の平面アンテナ装置の一例を示す平面図及
び断面図、第１０図は第９図の一部の構成図であり、図
において、１は放射素子、２は写真食刻により放射素子
１を形成しているプリント基板、３はその接地導体であ
る。又、４は放射素子１に給電するためのマイクロスト
リップアンテナ線路である。FIG. 9 is a plan view and a sectional view showing an example of a conventional planar antenna device, and FIG. 10 is a block diagram of a part of FIG. A printed circuit board forming the element 1, 3 is its ground conductor. Further, 4 is a microstrip antenna line for feeding power to the radiating element 1.
次に動作について説明する。マイクロストリップ線路４
から放射素子１に給電する周波数ｆ ｒｏとした時、第
９図において放射素子１の幅Ｗをに選定し、長さしを
ただし、
・・・（３）
但し、ε、は基板２の比誘電率、ｈは基板２の厚み、Ｃ
は光速、ε。。は等価比誘電率である。Next, the operation will be explained. Microstrip line 4
When the frequency of feeding power to the radiating element 1 is f ro, the width W of the radiating element 1 is selected as shown in FIG. dielectric constant, h is the thickness of the substrate 2, C
is the speed of light, ε. . is the equivalent dielectric constant.
に選定することにより放射素子１は共振し、周波数ｆ、
。の電波が放射される。なお、以上の原理についてはア
イ・ジェイ・バール（１，Ｊ、Ｂａｈｌ）氏およびピー
・バーティア（ｐ、３ｈａｒｔｉａ）氏による文献「マ
イクロストリップ アンテナ」の第２章（ＭＩＣＲＯ３
ＴＲＩＰ ＡＮＴＥＮＮＡＳ’ ｃｈａｐｔｅｒ２）を
参照されたい。By selecting , the radiating element 1 resonates and the frequency f,
. radio waves are emitted. The above principle is explained in Chapter 2 (MICRO3) of the literature "Microstrip Antenna" by I.J.
Please refer to TRIP ANTENNAS' chapter 2).
従来の平面アンテナ装置は以上のように構成されており
、基本的に放射素子１の共振現象を利用しているため、
周波数ｆ、から離れた周波数では放射パターン、入力イ
ンピーダンス、軸比の劣化が生じる。従って、広帯域の
アンテナには適さず、周波数ごとに放射素子１の幅Ｗ、
及び長さしを変えて共振周波数ｆ、を変化させる必要が
あるなどの問題点があった。The conventional planar antenna device is configured as described above, and basically utilizes the resonance phenomenon of the radiating element 1.
At frequencies far from the frequency f, the radiation pattern, input impedance, and axial ratio deteriorate. Therefore, it is not suitable for a wideband antenna, and the width W of the radiating element 1 for each frequency is
There are also problems in that it is necessary to change the resonant frequency f by changing the length.
この発明は上記のような従来のものの問題点を解消する
ためになされたもので、プリント基板２上に写真食刻さ
れた放射素子１の幅Ｗ、長さし及びプリント基板の厚み
ｈの寸法を変化させることなく、共振周波数ｆ、、を変
化させることができる平面アンテナ装置を得ることを目
的とする。This invention was made in order to solve the problems of the conventional ones as described above, and the width W and length of the radiating element 1 photo-etched on the printed circuit board 2 and the thickness h of the printed circuit board 2 are fixed. An object of the present invention is to obtain a planar antenna device that can change the resonant frequency f, without changing the resonant frequency f.
この発明に係る平面アンテナ装置は、放射素子を配置し
たマイクロストリップアンテナの電波を放射する側に、
固定あるいは距離可変の誘電体板を近接して設けたもの
である。The planar antenna device according to the present invention includes a microstrip antenna on which a radiating element is arranged, on the radio wave radiating side.
A fixed or variable-distance dielectric plate is provided adjacently.
この発明においては、平面アンテナ装置は放射素子を配
置したマイクロストリップアンテナと近接した誘電体板
により、それらの距離に応じて放射素子の寸法を変化さ
せることな（、共振周波数を変化させることができる。In this invention, the planar antenna device uses a dielectric plate adjacent to a microstrip antenna in which a radiating element is arranged, so that the dimensions of the radiating element can be changed (and the resonant frequency can be changed) according to the distance between them. .
以下、この発明の一実施例を図について説明する。第１
図及び第２図は本発明の一実施例による平面アンテナ装
置を示し、図において、１は放射素子、２は写真食刻に
より素子１を形成しているプリント基板、３はその地板
、４は放射素子１に給電するためのマイクロストリップ
線路、５は放射素子１の電波の放射方向に距離Ｚだけ離
れて近接して設けられた厚さｔの誘電体板である。An embodiment of the present invention will be described below with reference to the drawings. 1st
Figures 1 and 2 show a planar antenna device according to an embodiment of the present invention. In the figures, 1 is a radiating element, 2 is a printed circuit board on which the element 1 is formed by photo-etching, 3 is a base plate thereof, and 4 is a A microstrip line 5 for feeding power to the radiating element 1 is a dielectric plate having a thickness t that is provided close to the radiating element 1 at a distance Z in the radio wave radiation direction.
次に動作について説明する。マイクロストリップ線路４
から放射素子１に給電された電波はある周波数で共振現
象を起こし、その周波数で電波は放射される。この時、
第９図に示すように誘電体板５を設けない場合には（１
）式及び（２）式で求められる放射素子ｌの幅Ｗ、長さ
しを選ぶことによって周波数ｆｒＯで共振を生じる。Next, the operation will be explained. Microstrip line 4
The radio waves fed to the radiating element 1 from above cause a resonance phenomenon at a certain frequency, and the radio waves are radiated at that frequency. At this time,
As shown in FIG. 9, when the dielectric plate 5 is not provided (1
) and (2) by selecting the width W and length of the radiating element l to produce resonance at the frequency frO.
ここで、放射素子ｌに近接して距離Ｚだけ離れた位置に
厚さｔの誘電体板５を設けた場合、放射素子１での電界
分布はフリンジング効果により拡がった分布となり、等
価的に放射素子１の長さし及び幅Ｗは大きく見える。従
ってこの時の等価比誘電率ａ、は誘電体板５を設けない
場合の等価比誘電率ε。。に比べて大きくなる。これに
より、共振周波数ｆ、、は誘電体板５を設けない場合の
共振周波数ｆＦ（＋に比べて（４）式で表わされる周波
数Δｆ。Here, if a dielectric plate 5 with a thickness of t is provided close to the radiating element l and separated by a distance Z, the electric field distribution in the radiating element 1 becomes a widened distribution due to the fringing effect, and is equivalently The length and width W of the radiating element 1 appear large. Therefore, the equivalent relative permittivity a at this time is the equivalent relative permittivity ε when the dielectric plate 5 is not provided. . becomes larger compared to As a result, the resonant frequency f, , is the frequency Δf expressed by equation (4) compared to the resonant frequency fF (+) when the dielectric plate 5 is not provided.
たけ低くなる。It gets lower.
第３図はＶＳＷＲ（電圧定在波比）を示すが、破線Ｌ１
は誘電体板５を設けない場合の特性、実線Ｌ２は誘電体
板５を設けた場合の特性である。Figure 3 shows VSWR (voltage standing wave ratio), where the broken line L1
is the characteristic when the dielectric plate 5 is not provided, and the solid line L2 is the characteristic when the dielectric plate 5 is provided.
なお、上記実施例では放射素子１の形状として矩形のも
のを示したが、第４図に示すように円形放射素子１１の
場合でも同様の効果を奏する。In the above embodiment, the shape of the radiating element 1 is rectangular, but the same effect can be obtained even when the radiating element 11 is circular as shown in FIG.
また、第６図は放射素子１を配置したプリント基板２と
誘電体板との間隔２を可変できる可動機構６を設けたも
のである。第７図のグラフＬ３は距離Ｚを変化させた場
合の誘電体板５の厚さｔをパラメータにした場合の共振
周波数ｆ、を示すグラフである。誘電体板５を放射素子
１に近いほど、即ちＺが小さいほどフリンジング効果は
大きく、共振周波数は最も低くなるが、放射素子１から
離れるほど、即ちＺが大きいほど誘電体板５の影響は少
なくなり、共振周波数ｆ、は誘電体板５を設けない場合
の共振周波数に近づく。Further, FIG. 6 shows a device provided with a movable mechanism 6 that can vary the distance 2 between the printed circuit board 2 on which the radiating element 1 is arranged and the dielectric plate. Graph L3 in FIG. 7 is a graph showing the resonance frequency f when the thickness t of the dielectric plate 5 is used as a parameter when the distance Z is changed. The closer the dielectric plate 5 is to the radiating element 1, that is, the smaller Z is, the greater the fringing effect is, and the lowest the resonant frequency is. As a result, the resonant frequency f approaches the resonant frequency when the dielectric plate 5 is not provided.
従って、可動機構６を用いて放射素子１と誘電体板５と
の間隔Ｚを変化させることによって放射素子１の寸法を
変えることなく、共振周波数を変えることのできる同調
可能な平面アンテナ装置が実現できる。Therefore, by changing the distance Z between the radiating element 1 and the dielectric plate 5 using the movable mechanism 6, a tunable planar antenna device is realized in which the resonant frequency can be changed without changing the dimensions of the radiating element 1. can.
また、第８図は放射素子１を配置したプリント基板２の
上部に間隔Ｚだけ離れた位置に誘電体板からなるレドー
ム５１が配置され、ベース７上に固定された可動機構６
１により上記間隔Ｚを可変できるようにしたものであり
、可動機構６１を設けるだけで共振周波数を変えること
のできる同調可能な平面アンテナ装置が実現できる。Further, FIG. 8 shows a radome 51 made of a dielectric plate arranged at a distance Z above the printed circuit board 2 on which the radiating element 1 is arranged, and a movable mechanism 6 fixed on the base 7.
1 allows the above-mentioned interval Z to be varied, and by simply providing the movable mechanism 61, a tunable planar antenna device that can change the resonance frequency can be realized.
以上のように、この発明によれば、放射素子に近接して
固定あるいは距離可変の誘電体板を設けたので、放射素
子の寸法を変えることな（、共振周波数を可変できる平
面アンテナ装置が得られる効果がある。As described above, according to the present invention, since a fixed or distance-variable dielectric plate is provided close to the radiating element, a planar antenna device that can change the resonant frequency without changing the dimensions of the radiating element can be obtained. It has the effect of
第１図は本発明の一実施例による平面アンテナ装置を示
す図であり、第１図（ａ）はその平面図、第１図（ｂ）
はその断面図、第２図は第１図の一部の構成図、第３図
は平面アンテナ装置のＶＳＷＲ特性グラフを示す図、第
４図は本発明の他の実施例を示す図であり、第４図（ａ
）はその平面図、第４図（ｂｌはその断面図、第５図は
本発明の他の実施例を示す図であり、第５図（ａｌはそ
の平面図、第５図（ｂｌはその断面図、第６図は本発明
の他の実施例を示す図であり、第６図（ａｌはその平面
図、第６図（′ｂ）はその断面図、第７図は間隔Ｚを変
化させた場合の共振周波数の変化を示す図、第８図は本
発明の他の実施例を示す図であり、第８図（ａｉはその
平面図、第８図（ｂ）はその断面図、第９図は従来の平
面アンテナ装置を示す図であり、第９図（ａｌはその平
面図、第９図（ｂｌはその断面図、第１０図は第９図の
一部の構成図である。
図において、■は矩形の放射素子、２は写真食刻により
放射素子１を形成しているプリント基板、３はその接地
導体、４は放射素子１に給電するためのマイクロストリ
ップ線路、５は誘電体板、６はプリント基板２と誘電体
板５の間隔を変化させる可動機構、７はマイクロストリ
ップアンテナを固定するベース、１１は円形の放射素子
、５１はレドーム、６１はベース７に固定された可動機
構、Ｌｌは誘電体板５を設けない場合のＶＳＷＲ特性、
Ｌ２は誘電体板５を設けた場合のＶＳＷＲ特性、Ｌ３は
放射素子１と誘電体板５の間隔を変化させた場合の共振
周波数変化を示す特性カーブである。
なお図中同一符号は同−又は相当部分を示す。
第１図FIG. 1 is a diagram showing a planar antenna device according to an embodiment of the present invention, FIG. 1(a) is a plan view thereof, and FIG. 1(b) is a plan view thereof.
2 is a sectional view thereof, FIG. 2 is a configuration diagram of a part of FIG. 1, FIG. 3 is a diagram showing a VSWR characteristic graph of the planar antenna device, and FIG. 4 is a diagram showing another embodiment of the present invention. , Figure 4 (a
) is a plan view thereof, FIG. 4 (bl is a sectional view thereof, and FIG. 5 is a diagram showing another embodiment of the present invention, FIG. The cross-sectional view and FIG. 6 are views showing another embodiment of the present invention, and FIG. FIG. 8 is a diagram showing another embodiment of the present invention, and FIG. 8 (ai is a plan view thereof, FIG. 8(b) is a cross-sectional view thereof, FIG. 9 is a diagram showing a conventional planar antenna device. In the figure, ■ is a rectangular radiating element, 2 is a printed circuit board forming the radiating element 1 by photo-etching, 3 is its ground conductor, 4 is a microstrip line for feeding power to the radiating element 1, and 5 is a A dielectric plate, 6 is a movable mechanism for changing the distance between the printed circuit board 2 and the dielectric plate 5, 7 is a base for fixing the microstrip antenna, 11 is a circular radiating element, 51 is a radome, and 61 is fixed to the base 7. Ll is the VSWR characteristic when the dielectric plate 5 is not provided,
L2 is a VSWR characteristic when the dielectric plate 5 is provided, and L3 is a characteristic curve showing a change in resonance frequency when the distance between the radiating element 1 and the dielectric plate 5 is changed. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure 1
Claims (1)
を同一面上に配置してなるマイクロストリップアンテナ
と、 該マイクロストリップアンテナの上方にこれと並行に設
けられた、固定あるいは上下位置が調節可能な誘電体板
とを備えたことを特徴とする平面アンテナ装置。(1) A microstrip antenna in which a radiating element that resonates at a specific frequency and radiates radio waves is arranged on the same surface, and a fixed or vertical position is provided above and parallel to the microstrip antenna. A planar antenna device comprising: an adjustable dielectric plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25034788A JPH0297102A (en) | 1988-10-04 | 1988-10-04 | Plane antenna equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25034788A JPH0297102A (en) | 1988-10-04 | 1988-10-04 | Plane antenna equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0297102A true JPH0297102A (en) | 1990-04-09 |
Family
ID=17206565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25034788A Pending JPH0297102A (en) | 1988-10-04 | 1988-10-04 | Plane antenna equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0297102A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014187493A (en) * | 2013-03-22 | 2014-10-02 | Advanced Telecommunication Research Institute International | Resonance frequency variable antenna, electromagnetic wave energy recovery apparatus including the same, and adjustment method of resonance frequency variable antenna |
| JP2016158047A (en) * | 2015-02-24 | 2016-09-01 | 東芝テック株式会社 | Antenna |
| WO2018154676A1 (en) * | 2017-02-23 | 2018-08-30 | 日本電業工作株式会社 | Antenna and sector antenna |
| WO2023090139A1 (en) * | 2021-11-17 | 2023-05-25 | 株式会社村田製作所 | Antenna module and communication device having same mounted thereon |
-
1988
- 1988-10-04 JP JP25034788A patent/JPH0297102A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014187493A (en) * | 2013-03-22 | 2014-10-02 | Advanced Telecommunication Research Institute International | Resonance frequency variable antenna, electromagnetic wave energy recovery apparatus including the same, and adjustment method of resonance frequency variable antenna |
| JP2016158047A (en) * | 2015-02-24 | 2016-09-01 | 東芝テック株式会社 | Antenna |
| WO2018154676A1 (en) * | 2017-02-23 | 2018-08-30 | 日本電業工作株式会社 | Antenna and sector antenna |
| WO2023090139A1 (en) * | 2021-11-17 | 2023-05-25 | 株式会社村田製作所 | Antenna module and communication device having same mounted thereon |
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