Timed arrays : wideband and time varying antenna arrays /

• Κύριος συγγραφέας: Haupt, Randy L.
• Μορφή: Ηλ. βιβλίο
• Γλώσσα: English
• Έκδοση: Hoboken, New Jersey : John Wiley & Sons Inc., [2015]
• Θέματα: Antenna arrays.; Adaptive antennas.; Time-domain analysis.; TECHNOLOGY & ENGINEERING / Mechanical; Electronic books.

Introduces timed arrays and design approaches to meet the new high performance standards The author concentrates on any aspect of an antenna array that must be viewed from a time perspective. The first chapters briefly introduce antenna arrays and explain the difference between phased and timed arra...

Πίνακας περιεχομένων:

• List of Figures x
• Preface xix
• 1 Timed and Phased Array Antennas 1
• 1.1 Large Antennas 1
• 1.2 Collection of Elements 3
• 1.3 Overview of an Array Architecture 6
• 1.4 Transient Versus Steady State 7
• 1.5 Time Versus Phase 7
• 1.6 Book Overview 8
• References 9
• 2 RF Signals 10
• 2.1 The Carrier and Modulation 10
• 2.2 Noise and Interference 12
• 2.3 Polarization 15
• 2.4 Signal Bandwidth 17
• Reference 18
• 3 Arrays of Point Sources 19
• 3.1 Point Sources 19
• 3.2 Far Field 20
• 3.3 Array Sampling in the Time Domain 21
• 3.4 Array Sampling in the Frequency Domain 22
• 3.5 Grating Lobes: Spatial Aliasing 23
• 3.6 Subarrays and Panels 26
• 3.7 Electronic Beam Steering 29
• 3.8 Amplitude Weighting 31
• 3.8.1 Dolph-Chebyshev Taper 32
• 3.8.2 Taylor Tapers 33
• 3.8.3 Bayliss 34
• 3.9 Thinned Arrays 36
• References 39
• 4 Elements in Timed Arrays 41
• 4.1 Element Characteristics 41
• 4.1.1 Polarization 42
• 4.1.2 Impedance 43
• 4.1.3 Phase center 44
• 4.1.4 Conformal 44
• 4.1.5 Size 44
• 4.1.6 Directivity 45
• 4.1.7 Bandwidth 45
• 4.1.8 Balun 45
• 4.2 Elements 46
• 4.2.1 Dipole Array 46
• 4.2.2 Patch Array 47
• 4.2.3 Spiral Array 50
• 4.2.4 Helical Array 52
• 4.2.5 Tapered Slot Antenna (TSA) Array 53
• 4.2.6 Tightly Coupled Arrays 55
• 4.2.7 Fragmented Arrays 62
• 4.3 Mutual Coupling 63
• 4.4 Element Dispersion 66
• 4.5 Scaled Arrays 68
• 4.6 Interleaved Arrays 70
• References 75
• 5 Array Beamforming 78
• 5.1 PCB Transmission Lines 78
• 5.2 S-parameters 81
• 5.3 Matching Circuits 82
• 5.4 Corporate Feeds 82
• 5.5 Distributed Versus Centralized Amplification 83
• 5.6 Blass Matrix 84
• 5.7 Butler Matrix 85
• 5.8 Lenses 86
• 5.9 Reflectarrays 89
• 5.10 Digital Beamforming 91
• References 93
• 6 Active Electronically Scanned Array Technology 95
• 6.1 Semiconductor Technology for T/R Modules 96
• 6.2 T/R Module Layout 98
• 6.3 Amplifiers 100
• 6.4 Switches 109
• 6.5 Phase Shifter 114
• 6.6 Attenuators 120.
• 6.7 Limiter 121
• 6.8 Circulator 121
• 6.9 Correcting Errors through Calibration and Compensation 121
• References 123
• 7 Time Delay in a Corporate-Fed Array 126
• 7.1 Pulse Dispersion 128
• 7.2 Phased Array Bandwidth 130
• 7.3 Time Delay Steering Calculations 133
• 7.4 Time Delay Units 135
• 7.5 Unit Cell Constraints 138
• 7.6 Time Delay Bit Distribution at the Subarray Level 141
• References 147
• 8 Adaptive Arrays 149
• 8.1 Signal Correlation Matrix 150
• 8.2 Optimum Array Weights 152
• 8.3 Adaptive Weights Without Inverting the Correlation Matrix 154
• 8.4 Algorithms for Nondigital Beamformers 155
• 8.4.1 Partial Adaptive Nulling 156
• 8.4.2 Adaptive Nulling with Weight Constraints 158
• 8.4.3 Adaptive Nulling with Cancellation Beams 159
• 8.5 Reconfigurable Arrays 160
• 8.6 Reconfigurable Elements 165
• 8.7 Time-Modulated Arrays 167
• 8.8 Adaptive Thinning 172
• 8.9 Other Adaptive Array Alternatives 177
• 8.9.1 Beam Switching 178
• 8.9.2 Direction Finding 178
• 8.9.3 Retrodirective Array 181
• 8.9.4 MIMO 181
• References 184
• List of Symbols and Abbreviations 188
• Index 194.