Orthogonal Methods for Array Synthesis: Theory and the ORAMA Computer Tool

231 Pages·2006·2.51 MB·English

by  John Sahalos

ORTHOGONAL METHODS
FOR ARRAY SYNTHESIS

ORTHOGONAL METHODS
FOR ARRAY SYNTHESIS
Theory and the ORAMA Computer Tool
John N. Sahalos
Radiocommunications Laboratory
University ofThessaloniki, Greece
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Contents
Preface xi
1 Antennas and Antenna Arrays 1
1.1 Introduction 1
1.2 Antenna Array Factor 1
1.3 Elements and Array Types 3
1.4 Antenna Parameters and Indices 4
1.4.1 Radiated Power 4
1.4.2 Radiation Intensity 4
1.4.3 Directivity 5
1.4.4 AntennaEfficiency 5
1.4.5 Gain 6
1.4.6 AntennaPatterns 6
1.4.7 AntennaEffective Aperture 12
1.4.8 Beam Efficiency 12
1.4.9 Signal-to-NoiseRatio 13
1.4.10 Quality Factor 13
1.4.11 SensitivityFactor 14
1.5 Antenna Input Impedance 15
1.6 Antenna Arrays Classification 15
1.7 Array Factor Classification 15
References 16
2 Arrays: Linear, Planar, 3D and Conformal 19
2.1 Introduction 19
2.2 Linear Arrays 19
2.3 Uniform Linear Arrays 21
2.4 Chebyshev Linear Arrays 23
2.4.1 Chebyshev Polynomials 23
2.4.2 Dolph-ChebyshevArrays 23
2.4.3 Riblet Arrays 26
2.4.4 OtherChebyshev Arrays 27
2.5 Linear Arrays from Sampling or Root Matching of Line Sources 28
2.5.1 Simple Linear Distributions 28
2.5.2 TaylorDistribution(Chebyshev Error) 31
2.5.3 TaylorOne-parameter Distribution 34