Process and amplitude or phase monopulse radar device for

24 Pages·2013·2.45 MB·English

USO05784022A
United States Patent [19] [11] Patent Number: 5,784,022
Kiipfer [45] Date of Patent: Jul. 21, 1998
[54] PROCESS AND AMPLITUDE OR PHASE Acker. How to Speak Radar, Basic Fundamentals and Appli
MONOPULSE RADAR DEVICE FOR cations of Radar; Varian Assoc. pp. 30-31 (1988).
LOCATING FLYING OBJECTS
Leonov et al.. Monopulse Radar; Artech House. Inc.. chapter
[75] Inventor: Hanspeter Kiipfer. Birmensdorf. S.4.4 (“Functional Signal Processing”).
Switzerland 1 Schenkel. Cross-Feed Monopulse-A Speci?c Method to
[73] Assignee: Siemens Switzerland AG. Zurich. Eliminate Mistracking Over Sea, Presented at International
Switzerland Conference “Radar-87". London (Oct. 19-21. 1987).
[21] Appl. No.: 817,703 Sherman. Monopulse Principles and Techniques, Artech
House. pp. 73-75 and 339-343 (1984).
[22] PCT Filed: Apr. 9, 1996
Antenna Engineering Handbook, Third Edition, R. Johnson
[86] PCT No.: PCT/CH96/00l24
(ed). McGraw-Hill. Inc.. chapter 33. pp. 33-36-33-38
§ 371 Date: May 2, 1997 (1993).
§ 102(e) Date: May 2, 1997 Onsy A. Abd El-Alim et a.l.. “Second-Order Discriminant
Function for Amplitude Comparison Monopulse Antenna
[87] PCT Pub. No.: WO‘97/22890
Systems.” IEEE Transactions on Instrumentation Measure
PCI‘ Pub. Date: Jun. 26, 1997 ment, Bd. 40. No. 3. pp. 596-600 (Jun. 1991).
[30] Foreign Application Priority Data
Primary Examiner-John B. Sotomayor
Dec. 19, 1995 [CH] Switzerland ........................ .. 03590/95
Attorney, Agent, or Fi rm—Greenblurn & Bernstein P.L.C.
[51] Int. Cl.6 ................ .. Go1s 13/44;G01S 13/72
[57] ABSTRACT
[52] US. Cl. ............................... .. 342/80; 342/96; 3429?;
342/149; 342/154; 342/153; 342/194; 342/195
The process and the corresponding phase or amplitude
[58] Field of Search ................................ .. 342/80. 90. 95.
342196.97. 148. 149. 152. 153. 154. 155. single pulse radar device are used to locate a ?rst and
157. 158. 194. 195. 203 possibly a second target ('I'Tl. TF2) detected by the radar
beam from the direction x1. yl; x2. y2. The extended
[56] References Cited single-pulse aerial of the radar device has at least three
partial aerials for a ?rst measuring axis x (e.g. azimuth)
U.S. PATENT DOCUMENTS
which are arranged in such a way. have such directional
4,084,160 4/1978 Lenenberger et a1. ................ .. 342/148 characteristics and the signals of which are combined
4,219,816 8/1980 Schenkel et al. ....................... .. 342/89 together and weighted in such a way that two mutually
linearly independent. purely real or purely imaginary aerial
FOREIGN PATENT DOCUMENTS
functions which are independent of target displacements
592887 5/1975 Switzedand . perpendicular to the ?rst measuring axis are formed The
629898 2/1978 Switzerland . function course of these aerial functions F1(x) and F2(x) is
2014393 8/1979 United Kingdom .
measured for the individual case and the functional values
U1‘ HER PUBLICATIONS dependent upon the target displacement x are stored in the
storage unit (MEM). Measurements are found for the targets
M. Skolnic. Radar-Handbook, McGraw Hill. Chapter 21
of the position x1 and x2 detected by the radar beam
(1970).
according to the aerial functions F1 and F2.
S. Sherman. “Monopulse Principles and Techniques.”
Aspects of Modern Radar; E. Brookner (ed.). Artech House.
Inc.. Chapter 5 (1988). 31 Claims, 9 Drawing Sheets
US. Patent Jul. 21, 1998 Sheet 1 of 9 5,784,022
Fig. 1
goo moo my) _ 900 my)
US. Patent Jul. 21, 1998 Sheet 2 0f 9 5,784,022
Fig.2 HA1
Fig.3 y
D
5,784,022
US. Patent Jul. 21, 1998
US. Patent Jul. 21, 1998 Sheet 4 of 9 5,784,022
Fig. 7
PM
cKy)
m (y)
C(Y)
Fig. 8 me
| I I I
US. Patent Jul. 21, 1998 Sheet 5 of 9 5,784,022
Fig. 9
Azimuth Elevation
goo = E'r1(><) +H'poo + G'm (x) 58.0) = my) + H'gm + Gum)
F_01(x> = R1200 + SW10‘) + Waco 5m) = RB'EM + 831M + Tam)
E0200 = R2300 + S2'b_(x) + T2210‘) E920!) = R4'Q(y) + 84110) + T4110’)
5m)!’ @0017 5920047 504% 5% 52mg
limo ‘Liam ‘Lam $520)
Reina)? cb% zianmnyz... F2(y)?F1(y)
MEM
US‘ Patent
Jul‘ 21, 1998
Fig. 1 o
U.S. Patent Jul. 21, 1998 Sheet 7 of 9 5,784,022
Fig.11
674
Fig- 12
US. Patent
Jul. 21, 1998 Sheet 8 of 9 5,784,022
Fig. 13
Fig.14
US. Patent Jul. 21, 1998 Sheet 9 of 9 5,784,022
Fig. 15