JPH0128521B2 - - Google Patents
Info
- Publication number
- JPH0128521B2 JPH0128521B2 JP55063631A JP6363180A JPH0128521B2 JP H0128521 B2 JPH0128521 B2 JP H0128521B2 JP 55063631 A JP55063631 A JP 55063631A JP 6363180 A JP6363180 A JP 6363180A JP H0128521 B2 JPH0128521 B2 JP H0128521B2
- Authority
- JP
- Japan
- Prior art keywords
- polarization
- polarized wave
- phase difference
- polarized
- polarized waves
- 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
- 230000010287 polarization Effects 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【発明の詳細な説明】
この発明は、円偏波型マイクロストリツプアン
テナをアレイ構成した円偏波型アレイアンテナの
改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a circularly polarized array antenna in which circularly polarized microstrip antennas are arranged in an array.
第１図は周知の一点給電型の円偏波型マイクロ
ストリツプアンテナを示すものである。１１は誘
電体基板であり、この基板１１の一方面に地導体
１２が形成され、他方面に給電パターン１３が形
成される。この給電パターン１３は例えば円形の
対向部を円弧状に取り除いた構成とされており、
所定箇所給電点１４に給電線１５を介して入力信
号が供給される。 FIG. 1 shows a well-known single-point feeding circularly polarized microstrip antenna. 11 is a dielectric substrate, and a ground conductor 12 is formed on one side of this substrate 11, and a power supply pattern 13 is formed on the other side. This power supply pattern 13 has a configuration in which, for example, a circular opposing portion is removed in an arc shape,
An input signal is supplied to a predetermined power supply point 14 via a power supply line 15 .
給電点１４から入力された電磁界は２つの偏波
Ａ，Ｂに分解される。この２つの偏波間の振幅が
等しくかつ位相差が90゜であるとき円偏波が放射
される。しかしながら、第１図に示すような給電
パターン１３は偏波Ａと偏波Ｂの電磁界に対して
形状が異なつているため、両偏波Ａ，Ｂに対する
インピーダンス等の周波数特性が異なり、特に位
相差90゜の条件等に対してどうしても周波数特性
を持つてしまい、１周波数でしか円偏波が得られ
ず、広帯域な円偏波特性が得られなかつた。この
ため、このようなアンテナを複数個使用し、第２
図に示す如くアレイ構成とした場合、位相差等に
対する周波数特性は第１図に示すアンテナ単体の
場合と全く等価なものとなり、広帯域化を図るこ
とは困難であつた。尚、第２図において第１図と
同一部分には同一符号を付す。 The electromagnetic field input from the feed point 14 is decomposed into two polarized waves A and B. When the amplitudes between the two polarized waves are equal and the phase difference is 90°, circularly polarized waves are emitted. However, since the power feeding pattern 13 shown in FIG. It inevitably has frequency characteristics under conditions such as a phase difference of 90°, and circularly polarized waves can only be obtained at one frequency, and broadband circularly polarized wave characteristics cannot be obtained. Therefore, multiple such antennas are used and the second
In the case of an array configuration as shown in the figure, the frequency characteristics with respect to phase difference etc. are completely equivalent to the case of a single antenna shown in FIG. 1, and it has been difficult to achieve a wide band. In FIG. 2, the same parts as in FIG. 1 are given the same reference numerals.
この発明は上記事情に基づいてなされたもの
で、広帯域な円偏波特性が得られる円偏波型アレ
イアンテナを提供しようとするものである。 The present invention has been made based on the above circumstances, and aims to provide a circularly polarized wave array antenna that can obtain broadband circularly polarized wave characteristics.
以下、この発明の一実施例について図面を参照
して説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第３図はその構成を示すもので、３１は第１図
に示される給電パターン１３と同様なパターンで
あり、３２は給電点である。この給電パターン３
１では第１図と同様に互いに直交する２つの偏波
Ｃ，Ｄが発生される。これら偏波Ｃ，Ｄは給電パ
ターン３１によるアンテナ内部の縮退の解かれた
ベクトル的に直交する２つのモードの偏波であ
る。一方、給電パターン３３は給電パターン３１
とは異なる形状を有し、互いに直交する２つの偏
波Ｅ，Ｆを発生する。３４は給電点、３５は誘電
体基板である。偏波Ｅは給電パターン３１におけ
る偏波Ｃと同一偏波面を有し、偏波Ｆは同様に偏
波Ｄと同一偏波面を有する。 FIG. 3 shows its configuration, where 31 is a pattern similar to the power feeding pattern 13 shown in FIG. 1, and 32 is a power feeding point. This power supply pattern 3
1, two mutually orthogonal polarized waves C and D are generated as in FIG. These polarized waves C and D are polarized waves of two modes that are vectorally orthogonal and are degenerated inside the antenna by the feeding pattern 31. On the other hand, the power supply pattern 33 is the power supply pattern 31
It has a different shape from the one shown in FIG. 34 is a feeding point, and 35 is a dielectric substrate. The polarized wave E has the same plane of polarization as the polarized wave C in the feeding pattern 31, and the polarized wave F has the same plane of polarization as the polarized wave D.
この第３図に示すアンテナにおいては、偏波Ｃ
と偏波Ｅの合成偏波Ｇ及び偏波Ｄと偏波Ｆの合成
偏波Ｈが放射されるが、合成偏波Ｇ，Ｈ間の位相
差が少なくとも２つの周波数でπ／２となる構成
にされる。 In the antenna shown in Fig. 3, the polarization C
A configuration in which a composite polarization G of polarization E and a composite polarization H of polarization D and F are radiated, but the phase difference between the composite polarizations G and H is π/2 at at least two frequencies. be made into
第４図における実線Ｋは、この合成偏波Ｇ，Ｈ
間の位相差の周波数に対する特性の一例であり、
周波数1、2で位相差が90゜となつている。一点
鎖線ｉは給電パターン３１による偏波Ｃ，Ｄ間の
位相差の周波数に対する特性であり、波線ｊは給
電パターン３３による偏波Ｅ，Ｆ間の特性であ
る。すなわち、給電パターン３１における偏波
Ｃ，Ｄ間の位相差の周波数に対する変化率は負
で、給電パターン３３における偏波Ｅ，Ｆ間の位
層差の周波数に対する変化率は正である。また、
給電パターン３３では位相差がひとつの周波数で
のみ90゜となつて、この周波数でのみ円偏波が放
射され得る。一方、合成偏波Ｇ，Ｈ間の位相差
は、第４図に示すように、周波数1、2で90゜で
あり、第３図に示すアンテナとしては周波数1、
2で円偏波を放射することが可能となる。この場
合、給電パターン３３としては第３図に示すもの
のほか種々のものが考えられる。 The solid line K in FIG. 4 represents the combined polarized waves G, H
This is an example of the characteristics of the phase difference between
The phase difference between frequencies 1 and 2 is 90°. The dashed line i is the characteristic of the phase difference between the polarized waves C and D due to the feeding pattern 31 with respect to frequency, and the dashed line j is the characteristic between the polarized waves E and F due to the feeding pattern 33. That is, the rate of change of the phase difference between polarized waves C and D in the feeding pattern 31 with respect to frequency is negative, and the rate of change of the phase difference between polarized waves E and F in the feeding pattern 33 with respect to frequency is positive. Also,
In the feeding pattern 33, the phase difference is 90° only at one frequency, and circularly polarized waves can be radiated only at this frequency. On the other hand, the phase difference between the composite polarized waves G and H is 90° at frequencies 1 and 2 , as shown in Figure 4, and the antenna shown in Figure 3 has a phase difference of 90 degrees at frequencies 1 and 2.
2 makes it possible to radiate circularly polarized waves. In this case, various patterns other than the one shown in FIG. 3 are conceivable as the power feeding pattern 33.
例えば第３図に示す給電パターン３１と同じパ
ターンのものを90゜回転、すなわち偏波Ｃが縦方
向の偏波面、偏波Ｄが横方向の偏波面となるよう
にしたものを給電パターン３３として設けてもよ
い。また、隣合うパターンが互いに異なるパター
ンでも勿論よく、合成偏波間の位相差が少なくと
も２つの周波数で90゜となるものであればよい。 For example, the same pattern as the feeding pattern 31 shown in FIG. 3 is rotated by 90 degrees, that is, the polarized wave C is the vertical polarization plane, and the polarized wave D is the horizontal polarization plane, as the feeding pattern 33. It may be provided. Furthermore, it is of course possible that adjacent patterns are different from each other, as long as the phase difference between the synthesized polarized waves is 90° at at least two frequencies.
上記構成のアンテナによれば、第４図に示す如
く1及び2の周波数において偏波の位相差が90゜
であるため、1と2の選び方によつて、広帯域型
の円偏波アレイアンテナとして使用することがで
きる。また、1、2の２周波数共用の円偏波型ア
レイアンテナとしても使用できる。 According to the antenna with the above configuration, the phase difference between the polarized waves at frequencies 1 and 2 is 90° as shown in Figure 4, so depending on how 1 and 2 are selected, it can be used as a wideband circularly polarized array antenna. can be used. It can also be used as a circularly polarized array antenna that can share two frequencies ( 1 and 2) .
尚、この発明は上記実施例に限定されるもので
はなく、第１、第２のアンテナの配置は第３図に
示す面アレイに限らず、直線アレイやその他各種
のアレイ構成としてもよい。 It should be noted that the present invention is not limited to the above embodiment, and the arrangement of the first and second antennas is not limited to the planar array shown in FIG. 3, but may be a linear array or various other array configurations.
以上、詳述したようにこの発明によれば、広帯
域な円偏波特性が得られる円偏波型アレイアンテ
ナを提供できる。 As described in detail above, according to the present invention, it is possible to provide a circularly polarized array antenna that can obtain broadband circularly polarized wave characteristics.
第１図は一点給電型マイクロストリツプアンテ
ナを示すもので、同図ａは正面図、同図ｂは側面
図、第２図は従来の円偏波型アレイアンテナの構
成を示す正面図、第３図はこの発明に係わる円偏
波型アレイアンテナの一実施例を示す正面図、第
４図は第３図の原理を説明するために示す図であ
る。
３１，３３……給電パターン。
Figure 1 shows a single-point feeding type microstrip antenna, in which figure a is a front view, figure b is a side view, and figure 2 is a front view showing the configuration of a conventional circularly polarized array antenna. FIG. 3 is a front view showing an embodiment of a circularly polarized array antenna according to the present invention, and FIG. 4 is a diagram showing the principle of FIG. 3. 31, 33...Power supply pattern.
Claims (1)
体が設けられ、偏波面が直交する第１、第２の偏
波を送出し、かつこの第１、第２の偏波間の位相
差の周波数に対する変化率が正の第１の空中線素
子と、前記誘電層上で前記第１の放射素子導体と
並べて第２の放射素子導体が形成され、前記第１
の偏波と同じ偏波面の第３の偏波及び前記第２の
偏波と同じ偏波面の第４の偏波を送出し、かつこ
の第３、第４の偏波間の位相差の周波数に対する
変化率が負の第２の空中線素子とを具備し、前記
第１及び第３の偏波の第１の合成偏波と前記第２
及び第４の偏波の第２の合成偏波との位相差が少
なくとも２つの周波数でπ／２となるように構成
したことを特徴とする円偏波型アレイアンテナ。1. A ground conductor and a first radiating element conductor are provided with a dielectric layer in between, and transmit first and second polarized waves whose planes of polarization are orthogonal, and the phase difference between the first and second polarized waves is a first antenna element having a positive rate of change with respect to frequency; a second radiating element conductor formed on the dielectric layer in juxtaposition with the first radiating element conductor;
A third polarized wave having the same plane of polarization as the polarized wave and a fourth polarized wave having the same plane of polarization as the second polarized wave are transmitted, and for the frequency of the phase difference between the third and fourth polarized waves. a second antenna element having a negative rate of change, the first composite polarization of the first and third polarization and the second antenna element;
and a circularly polarized wave array antenna configured such that a phase difference between the fourth polarized wave and the second combined polarized wave is π/2 at at least two frequencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6363180A JPS56160104A (en) | 1980-05-14 | 1980-05-14 | Circular polarized wave type array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6363180A JPS56160104A (en) | 1980-05-14 | 1980-05-14 | Circular polarized wave type array antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56160104A JPS56160104A (en) | 1981-12-09 |
| JPH0128521B2 true JPH0128521B2 (en) | 1989-06-02 |
Family
ID=13234879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6363180A Granted JPS56160104A (en) | 1980-05-14 | 1980-05-14 | Circular polarized wave type array antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56160104A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5087920A (en) * | 1987-07-30 | 1992-02-11 | Sony Corporation | Microwave antenna |
| US5099249A (en) * | 1987-10-13 | 1992-03-24 | Seavey Engineering Associates, Inc. | Microstrip antenna for vehicular satellite communications |
| US5216430A (en) * | 1990-12-27 | 1993-06-01 | General Electric Company | Low impedance printed circuit radiating element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS538546A (en) * | 1976-07-13 | 1978-01-26 | Mitsubishi Electric Corp | Circular array antenna |
| JPS5339043A (en) * | 1976-09-22 | 1978-04-10 | Mitsubishi Electric Corp | Circular polarized wave array antenna |
-
1980
- 1980-05-14 JP JP6363180A patent/JPS56160104A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS538546A (en) * | 1976-07-13 | 1978-01-26 | Mitsubishi Electric Corp | Circular array antenna |
| JPS5339043A (en) * | 1976-09-22 | 1978-04-10 | Mitsubishi Electric Corp | Circular polarized wave array antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56160104A (en) | 1981-12-09 |
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