JPS6322482B2 - - Google Patents
Info
- Publication number
- JPS6322482B2 JPS6322482B2 JP55165807A JP16580780A JPS6322482B2 JP S6322482 B2 JPS6322482 B2 JP S6322482B2 JP 55165807 A JP55165807 A JP 55165807A JP 16580780 A JP16580780 A JP 16580780A JP S6322482 B2 JPS6322482 B2 JP S6322482B2
- Authority
- JP
- Japan
- Prior art keywords
- elliptical
- plate
- metal plate
- metal
- dielectric
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Description
【発明の詳細な説明】
本発明は、円偏波マイクロストリツプアンテナ
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circularly polarized microstrip antenna.
従来、円偏波で用いるマイクロストリツプアン
テナとして、第１図に示すような円板形状のマイ
クロストリツプアンテナがある。同図でａは正面
図、ｂは縦断面図である。図中の１は円板形状の
金属板、２は誘電体、３は金属基板、４は中心ピ
ン、５，５ａは給電ピン、６，６ａはコネクタで
ある。このアンテナは円偏波で用いるためには、
２点給電となり給電が複雑となる欠点があつた。
また、この種のアンテナは狭帯域であり、送受周
波数帯を共用するためには、広帯域化あるいは多
周波数帯共用化を図る必要があつた。 Conventionally, as a microstrip antenna used for circularly polarized waves, there is a disc-shaped microstrip antenna as shown in FIG. In the figure, a is a front view, and b is a longitudinal sectional view. In the figure, 1 is a disk-shaped metal plate, 2 is a dielectric, 3 is a metal substrate, 4 is a center pin, 5 and 5a are power supply pins, and 6 and 6a are connectors. In order to use this antenna with circular polarization,
The disadvantage was that the power supply was complicated due to the two-point power supply.
Furthermore, this type of antenna has a narrow band, and in order to share the transmitting and receiving frequency band, it is necessary to widen the band or share multiple frequency bands.
本発明は、これらの欠点を除去するために、金
属板の形状を楕円にすることにより１点給電と
し、さらに無給電楕円形素子を設けることにより
広帯域化あるいは多周波数帯共用化を図つた円偏
波マイクロストリツプアンテナを提供するもので
ある。 In order to eliminate these drawbacks, the present invention provides a single-point power feed by making the shape of the metal plate elliptical, and further provides a parasitic elliptical element to provide a circular shape that can be used to widen the band or share multiple frequency bands. The present invention provides a polarized microstrip antenna.
以下図面により本発明を詳細に説明する。 The present invention will be explained in detail below with reference to the drawings.
第２図および第３図は、本発明の実施例であつ
て、２は誘電体、３は金属基板、４は中心ピン、
５は給電ピン、６はコネクタ、７は楕円形状金属
板（第１の金属）、８は無給電の楕円形状金属板
（第２の金属板）である。これらの実施例で、ａ
は正面図、ｂは縦断面図である。本アンテナは、
給電ピン５によつて給電された楕円形状金属板７
が周波数1で励振すると同時に、無給電の楕円形
状金属板８が周波数2で励振され、周波数1およ
び2の電波を放射するものである。 2 and 3 show embodiments of the present invention, in which 2 is a dielectric, 3 is a metal substrate, 4 is a center pin,
5 is a power feeding pin, 6 is a connector, 7 is an elliptical metal plate (first metal), and 8 is a non-power feeding elliptical metal plate (second metal plate). In these examples, a
is a front view, and b is a longitudinal sectional view. This antenna is
Oval shaped metal plate 7 powered by power supply pin 5
is excited at frequency 1 , and at the same time, the parasitic elliptical metal plate 8 is excited at frequency 2 , and emits radio waves at frequencies 1 and 2 .
楕円形状金属板７および８から放射される電波
がブロードサイドで円偏波となる条件は、楕円の
短径と長径の比で決定される。この比はほぼ0.98
前後である。また偏波の回転方向は、給電点の位
置で決定される。本アンテナの給電点は長軸と
45゜をなす直線上付近にあり、長軸に対していず
れの側にあるかによつて右旋および左旋が決ま
る。従つて、周波数1および2の電波の偏波を同
旋とするためには、第２図に示すように金属板７
および８の長軸を一致させれば良く、一方、逆旋
の場合は、第３図に示すように長軸を直交させて
配置すれば良いことになる。特にこの逆旋の場合
は円板に比べて構成が極めて簡単になる。 The conditions under which the radio waves radiated from the elliptical metal plates 7 and 8 are broadside and circularly polarized are determined by the ratio of the short axis to the long axis of the ellipse. This ratio is approximately 0.98
Before and after. Furthermore, the rotation direction of polarized waves is determined by the position of the feeding point. The feeding point of this antenna is the long axis.
It lies near a straight line making an angle of 45 degrees, and right or left rotation is determined by which side of the long axis it is on. Therefore, in order to make the polarization of the radio waves of frequencies 1 and 2 co-rotating, the metal plate 7 is used as shown in Fig. 2.
It is sufficient that the long axes of and 8 are made to coincide with each other.On the other hand, in the case of reverse rotation, it is sufficient to arrange the long axes to be perpendicular to each other as shown in FIG. In particular, in the case of this reverse rotation, the configuration is extremely simple compared to a disk.
楕円形状金属板７および８の共振周波数は円板
の場合と同じく金属板の径で決定される。金属板
の端効果を考慮した等価楕円と等しい面積を持つ
等価円から求めた等価半径を用いて、共振周波数
は近似的に求められる。楕円形状金属板７および
８の等価半径を各々a1およびa2とすると基本モー
ド励振時の共振周波数1および2は次式で与えら
れる。 The resonant frequencies of the elliptical metal plates 7 and 8 are determined by the diameter of the metal plates, as in the case of disks. The resonant frequency is approximately determined using an equivalent radius determined from an equivalent circle having the same area as an equivalent ellipse that takes into account the edge effect of the metal plate. When the equivalent radii of the elliptical metal plates 7 and 8 are a1 and a2 , respectively, the resonance frequencies 1 and 2 during fundamental mode excitation are given by the following equations.
ここで、Ｃは光速度、εrは誘電体の比誘電率で
ある。従つて、等価半径a1およびa2が異なるよう
に２重楕円を構成すると、２周波数1，2で共振
するアンテナが構成できる。またa1およびa2を近
付けることによつて実質上帯域が広がつたように
構成することも可能である。 Here, C is the speed of light and ε r is the relative dielectric constant of the dielectric. Therefore, if a double ellipse is constructed so that the equivalent radii a 1 and a 2 are different, an antenna that resonates at two frequencies 1 and 2 can be constructed. It is also possible to make a configuration in which the band is substantially expanded by bringing a 1 and a 2 close to each other.
以上第２図および第３図を例として、無給電楕
円形状金属板８が１枚の場合について説明した
が、必要に応じて第２の金属板８の枚数を多くす
ることは可能であり、また、第１の金属板７の代
りに第２の金属板８に給電するように構成するこ
ともでき、これにより、多周波数帯共用あるいは
更に広帯域化が図れる。 The case where there is one parasitic elliptical metal plate 8 has been described above using FIGS. 2 and 3 as examples, but it is possible to increase the number of second metal plates 8 as necessary. Further, it is also possible to configure so that power is supplied to the second metal plate 8 instead of the first metal plate 7, thereby making it possible to share multiple frequency bands or to further widen the band.
以上説明したように、本発明の円偏波マイクロ
ストリツプアンテナは楕円形状金属板と無給電の
楕円形状金属板を用いることにより、簡易な構造
で円偏波において広帯域化あるいは多周波数帯共
用化を図ることができ、更に偏波共用も簡単であ
るという利点がある。 As explained above, the circularly polarized microstrip antenna of the present invention uses an elliptical metal plate and a parasitic elliptical metal plate to achieve a wide band or multiple frequency bands in circularly polarized waves with a simple structure. It has the advantage that polarization can be easily shared.
第１図ａ，ｂは従来の円板形状のマイクロスト
リツプアンテナの例を示す正面図及び縦断面図、
第２図ａ，ｂおよびおよび第３図ａ，ｂは本発明
の実施例を示す正面図及び縦断面図である。
１…円板形状の金属板、２…誘電体、３…金属
基板、４…中心ピン、５…給電ピン、６…コネク
タ、７…第１の楕円形状金属板、８…第２の楕円
形状金属板。
Figures 1a and 1b are a front view and a vertical sectional view showing an example of a conventional disc-shaped microstrip antenna;
FIGS. 2a and 2b and 3a and 3b are a front view and a vertical sectional view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Disc-shaped metal plate, 2... Dielectric, 3... Metal substrate, 4... Center pin, 5... Power supply pin, 6... Connector, 7... First elliptical metal plate, 8... Second elliptical shape metal plate.
Claims (1)
た金属基板と、前記誘電体板の他面側に配置され
た第１の金属板とを備えた円偏波マイクロストリ
ツプアンテナにおいて、前記第１の金属板を楕円
形状とし、前記誘電体内に第２の楕円形状金属板
を少なくとも１個さらに備えて、前記第１の楕円
形状金属板の長軸と前記第２の楕円形状金属板の
長軸の方向を一致させ、前記第１の楕円形状金属
板又は少なくとも１個の前記第２の楕円形状金属
板の一つに前記金属基板から前記誘電体板を介し
て前記長軸と45゜をなす直線上で１点給電するよ
うに構成したことを特徴とする円偏波マイクロス
トリツプアンテナ。 ２ 誘電体板と、該誘電体板の一面側に配置され
た金属基板と、前記誘電体板の他面側に配置され
た第１の金属板とを備えた円偏波マイクロストリ
ツプアンテナにおいて、前記第１の金属板を楕円
形状とし、前記誘電体内に第２の楕円形状金属板
を少なくとも１個さらに備えて、前記第１の楕円
形状金属板の長軸と前記第２の楕円形状金属板の
短軸の方向を一致させ、前記第１の楕円形状金属
板又は少なくとも１個の前記第２の楕円形状金属
板の一つに前記金属基板から前記誘電体板を介し
て前記長軸と45゜をなす直線上で１点給電するよ
うに構成したことを特徴とする円偏波マイクロス
トリツプアンテナ。[Scope of Claims] 1. A circularly polarized device comprising a dielectric plate, a metal substrate placed on one side of the dielectric plate, and a first metal plate placed on the other side of the dielectric plate. In the wave microstrip antenna, the first metal plate has an elliptical shape, and at least one second elliptical metal plate is further provided within the dielectric, and the long axis of the first elliptical metal plate is The directions of the long axes of the second elliptical metal plates are aligned, and the dielectric plate is moved from the metal substrate to one of the first elliptical metal plates or at least one of the second elliptical metal plates. A circularly polarized microstrip antenna characterized in that it is configured to feed power at one point on a straight line making an angle of 45 degrees with the long axis. 2. A circularly polarized microstrip antenna comprising a dielectric plate, a metal substrate placed on one side of the dielectric plate, and a first metal plate placed on the other side of the dielectric plate. The first metal plate has an elliptical shape, and the dielectric body further includes at least one second elliptical metal plate, so that the long axis of the first elliptical metal plate and the second elliptical shape The short axes of the metal plates are aligned in the same direction, and the long axis is passed from the metal substrate through the dielectric plate to one of the first elliptical metal plate or at least one second elliptical metal plate. A circularly polarized microstrip antenna characterized by being configured to feed power at one point on a straight line forming an angle of 45 degrees with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16580780A JPS5791003A (en) | 1980-11-27 | 1980-11-27 | Circular polarized wave microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16580780A JPS5791003A (en) | 1980-11-27 | 1980-11-27 | Circular polarized wave microstrip antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5791003A JPS5791003A (en) | 1982-06-07 |
| JPS6322482B2 true JPS6322482B2 (en) | 1988-05-12 |
Family
ID=15819361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16580780A Granted JPS5791003A (en) | 1980-11-27 | 1980-11-27 | Circular polarized wave microstrip antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5791003A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605932A (en) * | 1984-06-06 | 1986-08-12 | The United States Of America As Represented By The Secretary Of The Navy | Nested microstrip arrays |
| JPH0682974B2 (en) * | 1985-04-17 | 1994-10-19 | 日本電装株式会社 | Portable receiving antenna device |
| JPS62110302A (en) * | 1985-11-08 | 1987-05-21 | Mitsubishi Electric Corp | Microstrip antenna |
| US4835540A (en) * | 1985-09-18 | 1989-05-30 | Mitsubishi Denki Kabushiki Kaisha | Microstrip antenna |
| JPH0746762B2 (en) * | 1986-01-30 | 1995-05-17 | 日本電気株式会社 | Circularly polarized microstrip antenna |
| JP2571058B2 (en) * | 1987-07-02 | 1997-01-16 | アンリツ株式会社 | Micro strip antenna |
| FR2726127B1 (en) * | 1994-10-19 | 1996-11-29 | Asulab Sa | MINIATURIZED ANTENNA FOR CONVERTING AN ALTERNATIVE VOLTAGE TO A MICROWAVE AND VICE-VERSA, PARTICULARLY FOR WATCHMAKING APPLICATIONS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3803623A (en) * | 1972-10-11 | 1974-04-09 | Minnesota Mining & Mfg | Microstrip antenna |
-
1980
- 1980-11-27 JP JP16580780A patent/JPS5791003A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5791003A (en) | 1982-06-07 |
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