JPS58182305A - Antenna for circularly polarized wave - Google Patents
Antenna for circularly polarized waveInfo
- Publication number
- JPS58182305A JPS58182305A JP6489782A JP6489782A JPS58182305A JP S58182305 A JPS58182305 A JP S58182305A JP 6489782 A JP6489782 A JP 6489782A JP 6489782 A JP6489782 A JP 6489782A JP S58182305 A JPS58182305 A JP S58182305A
- Authority
- JP
- Japan
- Prior art keywords
- circularly polarized
- polarized wave
- antenna
- antennas
- wave
- 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
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)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、2つの直線偏波(楕円偏波を含む)励振用
アンテナを用いて円偏波を発生させる円偏波アンテナに
関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a circularly polarized antenna that generates circularly polarized waves using two linearly polarized (including elliptically polarized) excitation antennas.
〔発明の技術的背景およびその問題点〕従来、この種の
円偏波アンテナは、第1図に示すように2つの直線偏波
励振用アンテナにて励振される電界ベクトルの方向を互
いに直交させる会費があった。″すなわち、
の励振条件のもとに
E y = Ez e th’ T(2)の条件を満足
するように2つの直線偏波励振用アンテナを励振するこ
とによって円偏波を°得ていた。[Technical background of the invention and its problems] Conventionally, in this type of circularly polarized antenna, the directions of electric field vectors excited by two linearly polarized wave excitation antennas are orthogonal to each other, as shown in Fig. 1. There was a membership fee. That is, circularly polarized waves were obtained by exciting two linearly polarized wave excitation antennas so as to satisfy the condition of E y = Eze th' T (2) under the excitation condition of .
ただし、上記(1)式およびC)式においてElおよび
EsFiそれぞれグイボール素子DPIおよびDP2か
ら放射される電界のベクトル量、ExおよびEyはそれ
ぞれX方向およびy方向の放射電界、Xお△
よびyはそれぞれX方向およびy方向の単位ベクトルで
ある。この場合、これらの合成放射電界は7=f+1
”’Ex(Q+ethj29)
となり、確かに円偏波が励振されていることがわかる。However, in the above equations (1) and C), El and EsFi are the vector quantities of the electric fields radiated from the Guiball elements DPI and DP2, respectively, Ex and Ey are the radiated electric fields in the X direction and y direction, respectively, and X, △ and y are They are unit vectors in the X direction and the y direction, respectively. In this case, the combined radiated electric field is 7=f+1''Ex(Q+ethj29), and it can be seen that circularly polarized waves are certainly excited.
表お第1図においては、点fl 、 fl’および点f
2.f2’がそれぞれダイポール素子DPIおよびDP
2の給電点である。In the table and Figure 1, points fl, fl' and point f
2. f2' are dipole elements DPI and DP, respectively
This is the second power feeding point.
ところで、このような従来の円偏波アンテナにおいては
、上述したように励振偏波の向きを互いに直交させてお
くことが必須の要件となっていたことから、給電点の選
び方および励振方法の自由度が奪われてしまい、設計上
大きな不便を被ることがあった。By the way, in such conventional circularly polarized antennas, as mentioned above, it is essential that the directions of the excitation polarized waves are orthogonal to each other, so there is freedom in how to choose the feed point and the excitation method. This sometimes caused major inconveniences in terms of design.
−この発明は上記実情に鑑みてなされたものでるり、給
電点の選び方および励振方法について物理的に何ら制約
を与えることなく高精度の円偏波を発生せしめる円偏波
アンテナを提供することを目的とする。- This invention was made in view of the above circumstances, and it is an object of the present invention to provide a circularly polarized antenna that can generate highly accurate circularly polarized waves without imposing any physical restrictions on the method of selecting a feeding point or the excitation method. purpose.
〔発明の11!簀〕
すなわちこの発明社、2つの直線偏波励振用アンテナに
よって放射される電界の方向が90度に限らないすなわ
ち設計上都合の、よい任意の角度をもって二次元ま九は
三次元的に交差するようにし、この交差角度を上記2つ
の直線偏波励振用アンテナに各々給電する電圧(tたは
電流)の所定の位相差により電気的に補正して円偏波を
得るようにしたものであり、具体的には、得ようとする
円偏波に垂直な方向からみた上記電界の交差角度をθと
したときに上記各々給電する電力の位相差を(θ±π)
とする。[Invention 11! In other words, in this invention, the direction of the electric field radiated by two linearly polarized wave excitation antennas is not limited to 90 degrees, that is, two-dimensional and three-dimensional intersect at any suitable angle convenient for the design. This crossing angle is electrically corrected by a predetermined phase difference between the voltages (t or currents) respectively fed to the two linearly polarized wave excitation antennas to obtain circularly polarized waves. , Specifically, when the intersection angle of the above electric fields viewed from the direction perpendicular to the circularly polarized wave to be obtained is θ, the phase difference between the powers to be supplied to each of the above is (θ±π).
shall be.
以下、この発明にかかる円偏波アンテナを添附図面に示
す実施例にしたがって詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a circularly polarized antenna according to the present invention will be described in detail according to embodiments shown in the accompanying drawings.
#!2図は、この発明にがかる円偏波アンテナの素子の
配設態様の一実施例を示すものであり、説明の便宜上、
第1図に示したアンテナ同様2つのダイポール素子DP
IおよびDP2を用いた場合についてこの配設態様を示
している。なお、点fl。#! FIG. 2 shows an embodiment of the arrangement of elements of a circularly polarized antenna according to the present invention, and for convenience of explanation,
Similar to the antenna shown in Figure 1, two dipole elements DP
This arrangement is shown for the case where I and DP2 are used. In addition, point fl.
fl’および点f2.f2’がそれぞれダイポール素子
DPIおよびDP2の給電点であることは前述し九通夕
である。fl' and point f2. As mentioned above, f2' is the feeding point of dipole elements DPI and DP2, respectively.
さてこの実施例では、同第2図に示すように2つのダイ
ポール素子DPIおよびDP2を90度でない角度0を
もって二次元的に交差するよう配設したものであり、こ
れらダイポール素子DPIおよびDP2によって放射さ
れる電界E1およびE2も角度θをもって二次元的に交
差する。し九がって、ダイポール素子DPI(ま九はこ
の放射電界Es )をX軸にとった場曾、このダイポー
ル素子DPIの放射電界E、は
El =E、・X(4)
と表わされ、一方のダイポール素子DP2の放射電界E
トは
gH=g2amθ・x 十E 2 sinθ・y
(5)と表わされる。ただし、ElおよびE、はそれ
ぞれ前述したようにダイポール素子DPIおよびDP2
から放射される一電界のベクトル量を表わし、]Thl
およびE、はこれら電界の複素量を表わす。In this embodiment, as shown in FIG. 2, two dipole elements DPI and DP2 are arranged to intersect two-dimensionally at an angle of 0 that is not 90 degrees, and these dipole elements DPI and DP2 emit radiation. The electric fields E1 and E2 also intersect two-dimensionally at an angle θ. Therefore, if the dipole element DPI (the radiation electric field Es) is taken on the X axis, the radiation electric field E of this dipole element DPI is expressed as El = E, ・X (4) , the radiation electric field E of one dipole element DP2
gH=g2amθ・x 1E 2 sinθ・y
It is expressed as (5). However, El and E are dipole elements DPI and DP2, respectively, as described above.
represents the vector quantity of one electric field radiated from ]Thl
and E represent the complex quantities of these electric fields.
△
またXおよびyは前述し九通りそれぞれX方向およびy
方向の単位ベクトルを表わす。△ Also, X and y are the nine ways described above, respectively
Represents a unit vector in the direction.
よって、この場合の合成放射電界のX成分ixとy成分
iyとはそれぞれ
となって、例えば
・ ・ −j(θ±1c)
E1=E2e (7)を満
足するように第2図に示したアンテナを励振すれば上記
(6)式は
となることから右旋円偏波が得られることになり、また
・ ・ 」(#±x)
1、=EEl(9)
を満足するように励振すれば上記(6)式はとなること
がら左旋円偏波が得られるととになる。Therefore, in this case, the X component ix and the y component iy of the combined radiated electric field are shown in Figure 2 so as to satisfy, for example, -j (θ±1c) E1=E2e (7). If the antenna is excited, the above equation (6) becomes as follows, so a right-handed circularly polarized wave can be obtained, and the antenna must be excited so that it satisfies the following: (#±x) 1, = EEl (9) Since the above equation (6) becomes as follows, it follows that a left-handed circularly polarized wave is obtained.
以上(6)乃至(10)式により明らかなように、第2
図に示し九2つのダイポール素子DPIおよびDP2の
各給電点f1.f1’およびf2.f2’に対して互い
に位相差(θ±π)を有する電圧(または電R)を図示
しない給電装置から給電すれば所望の円偏波が得られる
ことになり、ダイポール素子DPIの給電点fl、fl
’に給電する電圧(tたは電流)の位相をダイポール素
子DP2の給電点f2.f2’に給電する電圧(または
電fi)の位相より(θ±π)だけ遅らせれば右旋円偏
波が発生し、逆K(a±π)だけ進ませれげ左旋円偏波
が発生する。As is clear from equations (6) to (10) above, the second
Each feeding point f1. of the 92 dipole elements DPI and DP2 shown in the figure. f1' and f2. If voltages (or voltages R) having a phase difference (θ±π) with respect to f2' are supplied from a power supply device (not shown), a desired circularly polarized wave can be obtained, and the power supply point fl of the dipole element DPI, fl
' The phase of the voltage (t or current) fed to the dipole element DP2's feeding point f2. If the phase of the voltage (or electric power fi) supplied to f2' is delayed by (θ±π), a right-handed circularly polarized wave will be generated, and if it is delayed by the reverse K (a±π), a left-handed circularly polarized wave will be generated. do.
なお、この発明にがかる円偏波アンテナでは、上述した
電界の交差角度0は任意に設定し得るものであ夛、該ア
ンテナの周囲環境に応じて、あるいは設計上の都合に応
じて適宜所望の値に設定すればよい。In addition, in the circularly polarized antenna according to the present invention, the electric field crossing angle 0 described above can be set arbitrarily, and can be set as desired depending on the surrounding environment of the antenna or according to design convenience. You can set it to a value.
また、この発明にがかる円偏波アンテナが第2図に示し
たような同一の位相中心を有するアンテナに限定される
ものでないことは勿論であシ、例えば第3図に示すよう
な位相中心の異なるペア素子についても有効に適用し得
る。Furthermore, it goes without saying that the circularly polarized antenna according to the present invention is not limited to antennas having the same phase center as shown in FIG. It can also be effectively applied to different paired elements.
すなわち第3図に示すアンテナの場合、2つのダイポー
ル素子DPIおよびDP2を互いに位相中心を異ならせ
て三次元的に配設したものであるが、同第3図に示すz
軸の方向からこのアンテナをみた場合は三次元的でFi
するがこれらダイポール素子DPIおよびDP2によっ
て放射される電界E、およびE2 も角度θをもって交
差するものであり、上記z軸に平行な方向に円偏波を発
生させるものとすればこのアンテナにおいても先に示し
た(4)乃至(10式が全て適用されることになる。In other words, in the case of the antenna shown in Fig. 3, two dipole elements DPI and DP2 are arranged three-dimensionally with their phase centers different from each other.
When looking at this antenna from the axis direction, it is three-dimensional and Fi
However, the electric fields E and E2 radiated by these dipole elements DPI and DP2 also intersect at an angle θ, and if circularly polarized waves are to be generated in the direction parallel to the z-axis, then the All formulas (4) to (10) shown in (4) to (10) are applied.
したがって、この第3図に示した2つのダイポール素子
DPIおよびDP2の各給電点fl、fl’およびf2
.f2’に対しても互いに位相差(θ±π)を有する電
圧(または電流)を図示しない給電装置から給電するこ
とにより、z軸と平行な方向に所望の円偏波が発生する
。なおこの場合、上記電界の交差角度0Fi得ようとす
る円偏波に垂直な方向からみ九ときの2つのダイポール
素子DPIおよびDP2による放射電界の角度でりり、
任意の方向からみ友ときの上記交差角度θをもとめて上
述した給電を施せば上iと平行な方向に限らない該みた
任意の方向に所望の円偏波を発生させることかできる。Therefore, the feeding points fl, fl' and f2 of the two dipole elements DPI and DP2 shown in FIG.
.. A desired circularly polarized wave is generated in a direction parallel to the z-axis by supplying voltage (or current) having a phase difference (θ±π) to f2′ from a power supply device (not shown). In this case, the above electric field crossing angle 0Fi is the angle of the radiated electric field by the two dipole elements DPI and DP2 when viewed from the direction perpendicular to the circularly polarized wave to be obtained.
If the above-mentioned crossing angle θ when viewed from any direction is determined and the above-mentioned power feeding is performed, it is possible to generate a desired circularly polarized wave in any direction not limited to the direction parallel to the direction i.
さらにこの発明にがかる円偏波アンテナは、上述し九ダ
イポール素子によって構成されるアンテナに限定される
ものでないことも勿論であり、2つの直線偏波励振用ア
ンテナを用いて円偏波を得るタイプのアンテナであれば
全てに適用できるものである。Furthermore, it goes without saying that the circularly polarized antenna according to the present invention is not limited to the above-mentioned antenna composed of nine dipole elements, but is of a type that obtains circularly polarized waves using two linearly polarized wave excitation antennas. It can be applied to all antennas.
ま友、上記した説明における直線偏波は厳密な意味では
楕円偏波を含むものである。したがって、本発明は楕円
偏波励振用アンテナを用いてもよいことは勿論である。Friend, the linearly polarized waves in the above explanation include elliptically polarized waves in a strict sense. Therefore, it goes without saying that the present invention may use an elliptically polarized wave excitation antenna.
以上説明し友ように、この発明にがかる円偏波アンテナ
によれば、第1及び第2の直線または楕円偏波励振用ア
ンテナにて励振される電界ベクトルの方向を互いに直交
させずとも所望とする円偏波を得ることができることか
ら、給電点の選び方および励振方法についての自由度が
大幅に向上し、設計に柔軟性をもたせることができる。As explained above, according to the circularly polarized wave antenna according to the present invention, the directions of the electric field vectors excited by the first and second linear or elliptically polarized wave excitation antennas do not need to be orthogonal to each other. Since circularly polarized waves can be obtained, the degree of freedom in selecting the feeding point and the excitation method is greatly improved, and flexibility can be provided in the design.
特に、アンテナ素子の配設スペースが限られた部位へこ
の発明にがかる円偏波アンテナを採用することの意義は
大きい。In particular, it is of great significance to employ the circularly polarized antenna according to the present invention in areas where space for installing antenna elements is limited.
第1図#i2つのダイポール素子を用いた従来の円偏波
アンテナにおける素子の配設構成を示す平面図、第2図
はこの発明にがかる円偏波アンテナを同一位相中心を有
する2つのダイポール素子を用いたアンテナに適用した
場合の素子の配設構成例を示す平面図、第3図はこの発
明にががる円偏波アンテナを同一位相中心にない2つの
ダイポール素子を用い良アンテナに適用した場合の素子
の配設構成例を示す立面図である。
DPI、DP2・・・ダイポール素子、fl、f1’。
f2.f2’−給電点
第1図
V?
第3図Fig. 1 #i is a plan view showing the arrangement of elements in a conventional circularly polarized antenna using two dipole elements, and Fig. 2 shows a circularly polarized antenna according to the present invention using two dipole elements having the same phase center. Figure 3 is a plan view showing an example of the arrangement of elements when applied to an antenna using the present invention. FIG. 7 is an elevational view showing an example of the arrangement of elements in the case of the present invention. DPI, DP2...dipole element, fl, f1'. f2. f2'-Feed point Figure 1 V? Figure 3
Claims (1)
励振用アンテナに、位相差(θ±π)をもたせて給電す
ることにより前記所定方向に円偏波を発生することを特
徴とする円偏波アンテナ。A circularly polarized wave is generated in the predetermined direction by feeding power with a phase difference (θ±π) to the first and second linearly or second linearly polarized wave excitation antennas arranged so as to have a phase difference (θ±π). Circularly polarized antenna.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6489782A JPS58182305A (en) | 1982-04-19 | 1982-04-19 | Antenna for circularly polarized wave |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6489782A JPS58182305A (en) | 1982-04-19 | 1982-04-19 | Antenna for circularly polarized wave |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58182305A true JPS58182305A (en) | 1983-10-25 |
Family
ID=13271321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6489782A Pending JPS58182305A (en) | 1982-04-19 | 1982-04-19 | Antenna for circularly polarized wave |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58182305A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100343893B1 (en) * | 1999-08-20 | 2002-07-19 | 우종명 | Circular-Polarized Dipole Antenna |
CN103050787A (en) * | 2011-10-12 | 2013-04-17 | 卡西欧计算机株式会社 | Antenna |
-
1982
- 1982-04-19 JP JP6489782A patent/JPS58182305A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100343893B1 (en) * | 1999-08-20 | 2002-07-19 | 우종명 | Circular-Polarized Dipole Antenna |
CN103050787A (en) * | 2011-10-12 | 2013-04-17 | 卡西欧计算机株式会社 | Antenna |
CN103050787B (en) * | 2011-10-12 | 2014-11-26 | 卡西欧计算机株式会社 | Antenna |
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