JPH0480562B2 - - Google Patents
Info
- Publication number
- JPH0480562B2 JPH0480562B2 JP7049782A JP7049782A JPH0480562B2 JP H0480562 B2 JPH0480562 B2 JP H0480562B2 JP 7049782 A JP7049782 A JP 7049782A JP 7049782 A JP7049782 A JP 7049782A JP H0480562 B2 JPH0480562 B2 JP H0480562B2
- Authority
- JP
- Japan
- Prior art keywords
- circularly polarized
- wave
- antenna
- output
- axial ratio
- 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
- 238000000034 method Methods 0.000 claims description 9
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 claims 1
- 230000010287 polarization Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000926 separation method Methods 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
- H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation
Description
【発明の詳細な説明】
本発明はさきに出願した「不要波消去アンテナ
装置及び方法」（公開番号昭第58−24248号）に関
連した発明である。さきの発明の場合の不要波は
円偏波反射波で、反射波として正旋、逆旋の両成
分が存在する現象を利用してそれを消去するもの
であつた。この場合、円偏波アンテナは広角で軸
比が良好なほど良く、一般に円偏波アンテナはそ
のようにつくられる。しかし、妨害波が反射波で
なく、希望波と同旋の円偏波で直接波として入射
する場合には、一般の広角で軸比の良い円偏波ア
ンテナでは妨害波を消去することは不可能であ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention is an invention related to the previously filed "Unnecessary Wave Elimination Antenna Device and Method" (Publication No. 58-24248). In the case of the previous invention, the unnecessary wave was a circularly polarized reflected wave, and it was canceled by utilizing the phenomenon that the reflected wave has both normal and anti-rotating components. In this case, the wider the angle and the better the axial ratio of the circularly polarized antenna, the better, and circularly polarized antennas are generally made that way. However, if the interference wave is not a reflected wave but is incident directly as a circularly polarized wave co-rotated with the desired wave, it is impossible to eliminate the interference wave with a general wide-angle circularly polarized antenna with a good axial ratio. It is possible.
本発明は、円偏波アンテナの軸比が劣化する
と、正旋の成分に対して逆旋の成分が相対的に大
きくなるという現象を利用して、直交する二つの
アンテナ素子を空間的に離すことにより、ボアサ
イト方向以外で軸比を劣化させ、円偏波妨害波を
消去する方法である。この方法を用いれば、利得
の低い、すなわち、指向性の広い小型のアンテナ
であつても妨害波を完全に消去できる大きな特徴
がある。 The present invention spatially separates two orthogonal antenna elements by utilizing the phenomenon that when the axial ratio of a circularly polarized antenna deteriorates, the anti-rotation component becomes larger relative to the normal rotation component. This method reduces the axial ratio in directions other than the boresight direction and eliminates circularly polarized interference waves. This method has the great advantage of completely eliminating interference waves even with a small antenna with a low gain, that is, a wide directivity.
以下図面に従つて本発明を説明する。 The present invention will be explained below with reference to the drawings.
第１図は従来の円偏波アンテナを用いて円偏波
の信号を取り出すブロツク図で、第２図は本発明
の円偏波アンテナを用いて円偏波希望波だけを取
り出すブロツク図である。１は円偏波希望波、２
は円偏波妨害波、３は従来の円偏波アンテナ素
子、４と５はハイブリツド結合器６の入力端子、
７と８はハイブリツド結合器６の出力端子、６は
ハイブリツド結合器、９は終端抵抗、１０はアー
ス、１１は本方法による空間的に離しておかれた
円偏波アンテナ素子、１２はボアサイト方向で軸
比が良好となるようにするための移相器、１３は
減衰器又は増幅器、１４は移相器、１７は合成
器、１５と１６は合成器１７の入力端子、１８は
合成器１７の出力端子である。 Figure 1 is a block diagram for extracting a circularly polarized signal using a conventional circularly polarized antenna, and Figure 2 is a block diagram for extracting only a desired circularly polarized wave using the circularly polarized antenna of the present invention. . 1 is circularly polarized desired wave, 2
3 is a conventional circularly polarized antenna element, 4 and 5 are input terminals of a hybrid coupler 6,
7 and 8 are the output terminals of the hybrid coupler 6, 6 is the hybrid coupler, 9 is the terminating resistor, 10 is the ground, 11 is the spatially separated circularly polarized antenna element according to the present method, and 12 is the boresight. 13 is an attenuator or amplifier, 14 is a phase shifter, 17 is a combiner, 15 and 16 are input terminals of the combiner 17, 18 is a combiner 17 output terminals.
従来用いられた正旋成分取出法を第１図で説明
する。アンテナ３の軸比が広角で良好な場合に
は、円偏波希望波１及び希望波と同旋の円偏波妨
害波２もハイブリツド結合器６の出力端子７に出
力する。本発明は、アンテナ素子の組合せを工夫
して妨害波を容易に消去するもので、第２図に従
い説明する。アンテナ正面方向で軸比を良くし、
それ以外の方向で軸比を劣化させるとハイブリツ
ド結合器６の電気特性によつてアンテナ正面方向
からの円偏波希望波を出力端子７に、円偏波妨害
波を出力端子７と８に分離出力することができ
る。したがつて、出力端子７と８に分離出力した
妨害波の両成分の振幅を増幅器又は減衰器１３で
等しくし、かつ移相器１４で逆相とした後、合成
器１７で合成すれば円偏波希望波だけを取り出す
ことが可能である。この場合、円偏波妨害波を出
力端子７と８に同程度の割合で出力させることが
望ましいが、このためには妨害波到来方向の軸比
を極度に劣化させる必要がある。しかし、従来の
円偏波アンテナのように二つのアンテナ素子を同
一点においたのではこのような軸比は得ることが
できない。したがつて、本方法の実現のためには
円偏波アンテナ素子となる、二つの素子をアンテ
ナ素子１１のように空間的に分離しておくことが
考えられる。なお、この空間的な分離の距離は、
妨害波の到来方向により変化する。 A conventionally used method for extracting the normal rotation component will be explained with reference to FIG. When the axial ratio of the antenna 3 is wide and good, the circularly polarized desired wave 1 and the circularly polarized interference wave 2 co-rotated with the desired wave are also output to the output terminal 7 of the hybrid coupler 6. The present invention is to easily eliminate interference waves by devising a combination of antenna elements, and will be explained with reference to FIG. Improve the axial ratio in the front direction of the antenna,
If the axial ratio deteriorates in other directions, the electrical characteristics of the hybrid coupler 6 will separate the circularly polarized desired wave from the front direction of the antenna into the output terminal 7, and the circularly polarized interference wave into the output terminals 7 and 8. It can be output. Therefore, if the amplitudes of both components of the interference wave separated and outputted to output terminals 7 and 8 are made equal by an amplifier or attenuator 13 and made to have opposite phases by a phase shifter 14, then they are combined by a combiner 17 to form a circle. It is possible to extract only the desired polarized wave. In this case, it is desirable to output the circularly polarized interference waves at the same rate to the output terminals 7 and 8, but for this purpose it is necessary to extremely deteriorate the axial ratio of the direction in which the interference waves arrive. However, such an axial ratio cannot be obtained by placing two antenna elements at the same point as in conventional circularly polarized antennas. Therefore, in order to realize this method, it is conceivable to spatially separate two elements, which are circularly polarized antenna elements, like the antenna element 11. The distance of this spatial separation is
It changes depending on the direction of arrival of the interference wave.
以上の方法によれば、従来のように円偏波アン
テナの指向性を鋭くしたり、指向性を合成するな
どの複雑さや多くの経費を使用することなく、ア
ンテナ素子の組合せを工夫することで円偏波妨害
波を完全に消去することができる。 According to the above method, the combination of antenna elements can be devised without the complexity and expense of sharpening the directivity of a circularly polarized antenna or composing the directivity as in the past. Circularly polarized interference waves can be completely eliminated.
第１図は通常の円偏波アンテナで正面方向から
の希望円偏波を、また、正面方向以外の方向から
の妨害円偏波を受信する様子を示した。第２図は
本発明による構成図である。
１…円偏波希望波、２…円偏波妨害波、３…通
常の円偏波アンテナ、４，５，７，８…ハイブリ
ツド結合端子、６…ハイブリツド結合器、９…終
端抵抗、１０…アース、１１…空間的に素子を離
した円偏波アンテナ、１２…１１のアンテナにお
いて正面方向で軸比が最良となるようにする移相
器、１３…増幅器又は減衰器、１４…移相器、１
５，１６…合成器１７の入力端子、１７…合成
器、１８…合成器１７の出力端子。
FIG. 1 shows how an ordinary circularly polarized antenna receives desired circularly polarized waves from the front direction and interference circularly polarized waves from directions other than the front direction. FIG. 2 is a block diagram according to the present invention. DESCRIPTION OF SYMBOLS 1...Circularly polarized desired wave, 2...Circularly polarized interference wave, 3...Ordinary circularly polarized antenna, 4, 5, 7, 8...Hybrid coupling terminal, 6...Hybrid coupler, 9...Terminal resistor, 10... Earth, 11...Circularly polarized antenna with elements spatially separated, 12...Phase shifter to maximize the axial ratio in the front direction in the antenna of 11, 13...Amplifier or attenuator, 14... Phase shifter ,1
5, 16...Input terminal of synthesizer 17, 17...Synthesizer, 18...Output terminal of synthesizer 17.
Claims (1)
振される２点給電円偏波アンテナの軸比をボアサ
イト方向（アンテナ正面方向）では良く、それ以
外の方向では劣化させ、受信した円偏波希望波及
び円偏波妨害波を90゜−3dBハイブリツド６へ導
き妨害波の逆旋成分を出力し、端子８に減衰器叉
は増幅器１３及び移相器１４を接続し、一方の端
子７から出力する妨害波の正旋成分と振幅を等し
くかつ位相を逆相に変換したのち、合成器１７に
おいて端子１５，１６の信号を合成することによ
り、出力端子１８には円偏波希望波だけを取り出
すことができることを特徴とするアンテナ軸比を
利用した妨害円偏波消去法。 ２ ボアサイト方向では軸比がよく、それ以外の
方向では軸比が劣化するように、２点給電円偏波
アンテナの直交するアンテナ素子を空間的に分離
して配置し、アンテナに接続された電力合成器
（90゜−3dBハイブリツト結合器）の二つの端子に
出力される妨害円偏波の正旋成分と逆旋成分を、
互いに逆相かつ同振幅となるよう移相器及び減衰
器（増幅器）を調整して両成分を相殺することが
できる特許請求の範囲第１項記載の消去法。[Claims] 1. The axial ratio of a two-point fed circularly polarized antenna that is excited spatially orthogonally and with a phase difference of 90° is good in the boresight direction (direction in front of the antenna), and in other directions. The received circularly polarized desired wave and circularly polarized interference wave are guided to the 90°-3 dB hybrid 6, and the anti-rotating component of the interference wave is output, and an attenuator or amplifier 13 and phase shifter 14 are connected to the terminal 8. After converting the normal rotation component of the disturbance wave output from one terminal 7 to have the same amplitude and opposite phase, the synthesizer 17 combines the signals at the terminals 15 and 16 to output the signal to the output terminal 18. is an interference circular polarization cancellation method that utilizes the antenna axial ratio and is characterized by being able to extract only the desired circularly polarized wave. 2 The orthogonal antenna elements of the two-point fed circularly polarized antenna are spatially separated and connected so that the axial ratio is good in the boresight direction and the axial ratio is poor in other directions. The normal and anti-rotating components of the interfering circularly polarized wave output to the two terminals of the power combiner (90°-3dB hybrid combiner) are
The elimination method according to claim 1, wherein both components can be canceled out by adjusting a phase shifter and an attenuator (amplifier) so that they have opposite phases and the same amplitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7049782A JPS58188905A (en) | 1982-04-28 | 1982-04-28 | Eliminating method of disturbing circular polarized wave utilizing antenna axis ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7049782A JPS58188905A (en) | 1982-04-28 | 1982-04-28 | Eliminating method of disturbing circular polarized wave utilizing antenna axis ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58188905A JPS58188905A (en) | 1983-11-04 |
| JPH0480562B2 true JPH0480562B2 (en) | 1992-12-18 |
Family
ID=13433215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7049782A Granted JPS58188905A (en) | 1982-04-28 | 1982-04-28 | Eliminating method of disturbing circular polarized wave utilizing antenna axis ratio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58188905A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5975704A (en) * | 1982-10-23 | 1984-04-28 | Japan Radio Co Ltd | Antenna |
| TW200503323A (en) | 2003-06-09 | 2005-01-16 | Matsushita Electric Ind Co Ltd | Antenna and electronic machine using the antenna |
-
1982
- 1982-04-28 JP JP7049782A patent/JPS58188905A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58188905A (en) | 1983-11-04 |
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