JPS5951371A - Antenna - Google Patents
AntennaInfo
- Publication number
- JPS5951371A JPS5951371A JP16167282A JP16167282A JPS5951371A JP S5951371 A JPS5951371 A JP S5951371A JP 16167282 A JP16167282 A JP 16167282A JP 16167282 A JP16167282 A JP 16167282A JP S5951371 A JPS5951371 A JP S5951371A
- Authority
- JP
- Japan
- Prior art keywords
- angle
- linear array
- radio waves
- antenna
- axis
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は複数の電波が到来したとき、その到来方向を
検知するアンテナ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna device that detects the arrival direction of a plurality of radio waves when they arrive.
従来のこの種装置はビーム走査を行なって到来電波の方
向を検出していた。この方法によると。Conventional devices of this type perform beam scanning to detect the direction of incoming radio waves. According to this method.
覆域全体にビーム走査を行なわねばならず高速処理が難
しいという問題があった。また、リニアアレーアンテナ
の素子アンテナからの受信信号をFFT回路を用いてフ
ーリエ変換し、角度?算出する方法もあるが、この場合
空間釣鐘走査を行なう場合、二次元フーリエ変換を行な
わねばならず。There was a problem in that high-speed processing was difficult because the beam had to be scanned over the entire coverage area. In addition, the received signal from the element antenna of the linear array antenna is Fourier transformed using an FFT circuit, and the angle? There is also a method of calculating it, but in this case, when performing spatial bell scanning, a two-dimensional Fourier transform must be performed.
FFT回路全多数必要とする。A total number of FFT circuits are required.
この発明はこれらの欠点を除去するために互いに平行で
ない3本のリニアアレーアンテナに771回路を設け、
それぞれのりニアアレーアンテナに771回路を接続し
て、到来電波の方向と各リニアアレーアンテナとのなす
角度を検出する第1のりニアアレーアンテナで検出され
た角度と第2のリニアアレーアンテナで検出された角度
を一つずつ組み合わせることによって、三次元的な方向
角が算出されるが、到来電波が複数の場合、真の到来角
の他に余分な角度も算出される。そこで。In order to eliminate these drawbacks, this invention provides 771 circuits in three linear array antennas that are not parallel to each other.
A 771 circuit is connected to each linear array antenna to detect the angle between the direction of the incoming radio wave and each linear array antenna.The angle detected by the first linear array antenna and the angle detected by the second linear array antenna are A three-dimensional direction angle is calculated by combining the angles obtained one by one. However, when there are multiple arriving radio waves, extra angles are calculated in addition to the true angle of arrival. Therefore.
次に第2のリニアアレーアンテナと第3のリニアアレー
アンテナで検出された角度を一つずつ組み合わせること
によって方向角全算出する。この方向角と第1のりニア
アレーアンテナと第2のリニアアレーアンテナの組み合
わせによって算出された方向角に共通に含まれるものを
電波の到来角度とするもので、その目的は、少ない処理
回路で迅速に電波の到来方向を検出することにある。以
下図面について詳細に説明する。Next, the total direction angle is calculated by combining the angles detected by the second linear array antenna and the third linear array antenna one by one. The arrival angle of the radio wave is defined as the angle of arrival of the radio wave that is commonly included in the direction angle calculated by the combination of this direction angle and the first linear array antenna and the second linear array antenna. The goal is to detect the direction of arrival of radio waves. The drawings will be explained in detail below.
第1図はこの発明の実施例で(Ia) 、 (Ib)
、 (Ic)げ素子アンテナ、 (2a)H素子アンテ
ナ(1a)で構成されたリニアアレーアンテナ、(2b
)U素子アンテナ(1b)で構成されたリニアアレーア
ンテナ、 (2c)は素子アンテナ(1C)で構成され
たリニアアレーアンテナ、 (3a) 、 (3b)t
−を角度演算回路、 (4d) 、 (4e)に方向検
出回路、(51t’l算出回路である。Figure 1 shows examples of this invention (Ia) and (Ib).
, (Ic) barbed element antenna, (2a) linear array antenna composed of H element antenna (1a), (2b)
) Linear array antenna composed of U element antenna (1b), (2c) linear array antenna composed of element antenna (1C), (3a), (3b) t
- is an angle calculation circuit, (4d) and (4e) are direction detection circuits, and (51t'l calculation circuit).
次に、この実施例の動作を述べる。角度演算回路(3a
) 、 (3b) 、 (3c)はそれぞれリニアアレ
ーアンテナ(2a)、 (2b)、 (2c)の素子ア
ンテナからの受信信号IFFT回路を用いてフーリエ変
換し、到来電波と各リニアアレーアンテナの素子アンテ
ナの配列軸とのなす角度を算出する。第2図は、リニア
アレーアンテナを軸とし、上記角度を円錐角とする円錐
を示す図で、到来電波の方向はこの円錐面上の母線で示
される一図中、Lけリニアアレーアンテナ、ψは上記角
度演算回路によって算出された角度を示す。ここで到来
電波が二つの場合を考える。角度演算回路(3a)で算
出された角度を艷1.ψa2.角度演算回路(31−+
)で算出された角度をψb+、ψb2とする。方向検出
回路(4d、)U二つの角度の組み合わせ(ψafi
、ψbj)(1−j= ’ $ 2)によって四つの方
向角を検出するが、この中で真の電波の方向角は二つで
残り二つを除去する必要がある。次に、同様にして、角
度演算回路(3C)で算出された角度をψ。1.ψ。2
として、方向検出回路(4e)は二つの角度の組み合わ
せ(ψbi 、ψ。j)(i、j二1.2)によって四
つの方向角を検出する。算出回路(51はこの四つの方
向角の中で先の(ψaimψ1.j)の組み合わせによ
って検出した方向角にも共通に含まれるものを検出して
電波の到来方向を検知する。第2図はリニアアレーアン
テナを軸とし、上記角度を円錐角とする円錐を示す図で
、到来電波の方向はこの円錐面上の母線で示される。図
中りはリニアアレーアンテナ、ψは上記角度演算回路に
よって算出された角度を示す。Next, the operation of this embodiment will be described. Angle calculation circuit (3a
), (3b), and (3c) are the received signals from the element antennas of linear array antennas (2a), (2b), and (2c), which are Fourier-transformed using an IFFT circuit, and the incoming radio waves and the elements of each linear array antenna are Calculate the angle between the antenna and the array axis. Figure 2 is a diagram showing a cone with the linear array antenna as the axis and the above angle as the cone angle. indicates the angle calculated by the angle calculation circuit. Now consider the case where there are two arriving radio waves. The angle calculated by the angle calculation circuit (3a) is converted to 1. ψa2. Angle calculation circuit (31-+
) are calculated as ψb+ and ψb2. Direction detection circuit (4d,) U combination of two angles (ψafi
, ψbj) (1-j=' $ 2), four direction angles are detected, of which two are true direction angles of radio waves, and the remaining two need to be removed. Next, in the same way, the angle calculated by the angle calculation circuit (3C) is ψ. 1. ψ. 2
, the direction detection circuit (4e) detects four direction angles by the combination of two angles (ψbi, ψ.j) (i, j21.2). The calculation circuit (51) detects the direction angle among these four direction angles that is commonly included in the direction angle detected by the combination of (ψaimψ1.j) and detects the arrival direction of the radio wave. This is a diagram showing a cone with the linear array antenna as the axis and the above angle as the cone angle, and the direction of the incoming radio wave is indicated by the generatrix on this cone surface. Shows the calculated angle.
第3図は上の動作を示すダイヤグラムでLa。Figure 3 is a diagram showing the above operation.
Lb、Lcは角度演算回路(3a) 、 (3b) 、
(3c)で検出する角度の集合を表わす角度の集合を
表わす直線で、ψa1.ψa2は2方向から電波が到来
する場合角度演算回路(3a)で検出される角度、ψb
l 、ψb2は角度演算回路(3b)で検出される角度
、ψ。1゜ψc2は角度演算回路(3C)で検出される
角度、黒丸は電波の到来方向を示す点、白丸は余分に検
出される角度を示す点である。第1図の実施例で示した
動作によるとψaimψbi−ψci (i= 1
e 2)に降ろされたLai 、 Lbi 、 Lci
(i= 1 、2) ノ垂線が交わる点から求められ
る方向角が方向検出回路(4d)、(4θ)で算出され
るが、方向検出回路(4(1)、(4θ)共通に含まれ
る角度を算出回路(5)で算出することは第2図で上記
の垂線の3本が交わる点を算出することに相当し、電波
の到来方向のみを検出することができる。Lb and Lc are angle calculation circuits (3a), (3b),
A straight line representing the set of angles detected in (3c), ψa1. ψa2 is the angle detected by the angle calculation circuit (3a) when radio waves arrive from two directions, ψb
l, ψb2 is the angle, ψ, detected by the angle calculation circuit (3b). 1°ψc2 is the angle detected by the angle calculation circuit (3C), the black circle is a point indicating the arrival direction of the radio wave, and the white circle is a point indicating the angle detected in excess. According to the operation shown in the embodiment of FIG. 1, ψaimψbi−ψci (i=1
Lai, Lbi, Lci dropped off at e2)
(i = 1, 2) The direction angle found from the point where the perpendicular lines intersect is calculated by the direction detection circuit (4d), (4θ), but the direction detection circuit (4(1), (4θ) is included in common Calculating the angle by the calculation circuit (5) corresponds to calculating the point where the three perpendicular lines intersect as shown in FIG. 2, and only the direction of arrival of the radio waves can be detected.
なお1以上は電波が2方向から到来する場合について説
明したが、この発明はこれに限らずより多数の電波が到
来する場合について使用できる。Although the above description has been made regarding the case where radio waves arrive from two directions, the present invention is not limited to this, and can be used in cases where a larger number of radio waves arrive.
このようにこの発明に係るアンテナ装置では多数の電波
の到来方向を簡単な処理回路によって検出できる利点が
ある。As described above, the antenna device according to the present invention has the advantage that the arrival directions of a large number of radio waves can be detected by a simple processing circuit.
第1図はこの発明の実施例を示す図、第2図はリニアア
レーアンテナの配列軸を軸とし、角度演算回路で算出さ
れる角度を円錐角とする円錐を示す図、第3図は検出さ
れる角度のダイヤグラムを示す図で1図中(Ia) 、
(1b) 、 (1c)H素子アンテナ。
(2a) ld素子アンテナ(1a)で構成されたりニ
アアレーアンテナ、 (2b)U素子アンテナ(1b)
で構成されたりニアアレーアンテナ、(2c)U素子ア
ンテナ(1C)で構成されたリニアアレーアンテナ+
(3a) *(3b) 、 (6c)は角度演算回路1
(4d)、 (4e)は方向検出回路、(5)ii算
出回路、Liiリニアアレーアンテナ、ψは上記演算回
路で算出される角度、La。
Lb、Lci4角度演算回路(3aL (3b)、 p
c)で検出する角度の集合を表わす直線、籠1.ψa2
は角度演算回路(3a)で検出される角度、ψb1.ψ
b2は角度演算回路(3b)で検出される角度、ψc1
.ψc2は角度演算回路(3c)で検出される角度、黒
丸は電波の到来方向を示す点、白丸は余分に検出される
角度を示す点である。
なお図中、同一あるいは相当部分には同−符号第1図Fig. 1 is a diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing a cone whose axis is the arrangement axis of the linear array antenna, and the cone angle is the angle calculated by the angle calculation circuit, and Fig. 3 is a diagram showing the detection (Ia) in Figure 1 shows a diagram of the angle
(1b), (1c) H element antenna. (2a) Near array antenna consisting of LD element antenna (1a), (2b) U element antenna (1b)
A linear array antenna consisting of (2c) a U element antenna (1C) +
(3a) *(3b), (6c) are angle calculation circuit 1
(4d), (4e) are direction detection circuits, (5) ii calculation circuit, Lii linear array antenna, ψ is the angle calculated by the above calculation circuit, and La. Lb, Lci4 angle calculation circuit (3aL (3b), p
A straight line representing a set of angles detected in c), cage 1. ψa2
is the angle detected by the angle calculation circuit (3a), ψb1. ψ
b2 is the angle detected by the angle calculation circuit (3b), ψc1
.. ψc2 is the angle detected by the angle calculation circuit (3c), the black circle is a point indicating the arrival direction of the radio wave, and the white circle is a point indicating the angle detected in excess. In addition, the same or equivalent parts in the figures have the same reference numerals in Figure 1.
Claims (1)
に配列して第1.第2および第3のリニアアレーアンテ
ナを形成し、上記3本のりニアアレーアンテナのそれぞ
れに、上記リニアアレーアンテナの素子アンテナの受信
信号をフーリエ変換することにより、各リニアアレーア
ンテナの素子アンテナ配列軸と到来電波の方向とのなす
角度を算出する第1.第2および第3の角度演算回路を
設け、上記第1のリニアアレーアンテナの素子アンテナ
配列軸を軸とし、上記第1の角度演算回路で算出される
角度を円錐角とする複数個の第1の円錐面と、上記第2
のりニアアレーアンテナの配列軸を軸とし、上記第2の
角度演算回路で算出される角度を円錐角とする複数個の
第2の円錐面が交わる複数個の第1の方向角を求める方
向検出回路を設け、上記第3のりニアアレーアンテナの
配列軸を軸とし、上記第3の角度演算回路で算出される
角度を円錐角とする被数個の第3の円錐面と上記第2の
円錐面が交わる複数個の第2の方向角を上記方向検出回
路捷たに他の方向検出回路を用いて求め、上記第1の方
向角と第2の方向角が一致する到来角度を算出する判断
回路を設けたことを特徴とするアンテナ装置。A plurality of element antennas are arranged on three straight lines that are not parallel to each other. A second and a third linear array antenna are formed, and the element antenna array axis of each linear array antenna is applied to each of the three linear array antennas by Fourier transforming the received signal of the element antenna of the linear array antenna. The first step is to calculate the angle between the direction of the incoming radio wave and the direction of the arriving radio wave. second and third angle calculation circuits are provided, and a plurality of first angle calculation circuits are provided, the element antenna array axis of the first linear array antenna is the axis, and the angle calculated by the first angle calculation circuit is a cone angle. and the second conical surface of
Direction detection for determining a plurality of first directional angles where a plurality of second conical surfaces intersect, with the array axis of the linear array antenna as the axis and the conical angle being the angle calculated by the second angle calculation circuit. a circuit is provided, and a number of third conical surfaces whose cone angle is an angle calculated by the third angle calculation circuit and whose axis is the arrangement axis of the third linear array antenna, and the second conical Determining that a plurality of second direction angles where the surfaces intersect are determined by using the direction detection circuit and another direction detection circuit, and an arrival angle at which the first direction angle and the second direction angle coincide is calculated. An antenna device characterized by being provided with a circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16167282A JPS5951371A (en) | 1982-09-17 | 1982-09-17 | Antenna |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16167282A JPS5951371A (en) | 1982-09-17 | 1982-09-17 | Antenna |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5951371A true JPS5951371A (en) | 1984-03-24 |
Family
ID=15739644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16167282A Pending JPS5951371A (en) | 1982-09-17 | 1982-09-17 | Antenna |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5951371A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05196716A (en) * | 1991-08-02 | 1993-08-06 | Koden Electron Co Ltd | Direction finder |
JP2005331343A (en) * | 2004-05-19 | 2005-12-02 | Nippon Signal Co Ltd:The | Electric wave angle-of-arrival prediction system |
JP2014219265A (en) * | 2013-05-08 | 2014-11-20 | 株式会社東海理化電機製作所 | Magnetic flux vector direction detector |
-
1982
- 1982-09-17 JP JP16167282A patent/JPS5951371A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05196716A (en) * | 1991-08-02 | 1993-08-06 | Koden Electron Co Ltd | Direction finder |
JP2005331343A (en) * | 2004-05-19 | 2005-12-02 | Nippon Signal Co Ltd:The | Electric wave angle-of-arrival prediction system |
JP4679075B2 (en) * | 2004-05-19 | 2011-04-27 | 日本信号株式会社 | Radio wave arrival angle estimation device |
JP2014219265A (en) * | 2013-05-08 | 2014-11-20 | 株式会社東海理化電機製作所 | Magnetic flux vector direction detector |
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