Timed Arrays : Wideband and Time Varying Antenna Arrays.
Title:
Timed Arrays : Wideband and Time Varying Antenna Arrays.
Author:
Haupt, Randy L.
ISBN:
9781119072096
Personal Author:
Edition:
1st ed.
Physical Description:
1 online resource (221 pages)
Contents:
Title Page -- Copyright Page -- Contents -- List of Figures -- Preface -- Chapter 1 Timed and Phased Array Antennas -- 1.1 Large Antennas -- 1.2 Collection of Elements -- 1.3 Overview of an Array Architecture -- 1.4 Transient Versus Steady State -- 1.5 Time Versus Phase -- 1.6 Book Overview -- References -- Chapter 2 RF Signals -- 2.1 The Carrier and Modulation -- 2.2 Noise and Interference -- 2.3 Polarization -- 2.4 Signal Bandwidth -- Reference -- Chapter 3 Arrays of Point Sources -- 3.1 Point Sources -- 3.2 Far Field -- 3.3 Array Sampling in the Time Domain -- 3.4 Array Sampling in the Frequency Domain -- 3.5 Grating Lobes: Spatial Aliasing -- 3.6 Subarrays and Panels -- 3.7 Electronic Beam Steering -- 3.8 Amplitude Weighting -- 3.8.1 Dolph-Chebyshev Taper -- 3.8.2 Taylor Tapers -- 3.8.3 Bayliss -- 3.9 Thinned Arrays -- References -- Chapter 4 Elements in Timed Arrays -- 4.1 Element Characteristics -- 4.1.1 Polarization -- 4.1.2 Impedance -- 4.1.3 Phase center -- 4.1.4 Conformal -- 4.1.5 Size -- 4.1.6 Directivity -- 4.1.7 Bandwidth -- 4.1.8 Balun -- 4.2 Elements -- 4.2.1 Dipole Array -- 4.2.2 Patch Array -- 4.2.3 Spiral Array -- 4.2.4 Helical Array -- 4.2.5 Tapered Slot Antenna (TSA) Array -- 4.2.6 Tightly Coupled Arrays -- 4.2.7 Fragmented Arrays -- 4.3 Mutual Coupling -- 4.4 Element Dispersion -- 4.5 Scaled Arrays -- 4.6 Interleaved Arrays -- References -- Chapter 5 Array Beamforming -- 5.1 PCB Transmission Lines -- 5.2 S-parameters -- 5.3 Matching Circuits -- 5.4 Corporate Feeds -- 5.5 Distributed Versus Centralized Amplification -- 5.6 Blass Matrix -- 5.7 Butler Matrix -- 5.8 Lenses -- 5.9 Reflectarrays -- 5.10 Digital Beamforming -- References -- Chapter 6 Active Electronically Scanned Array Technology -- 6.1 Semiconductor Technology for T/R Modules -- 6.2 T/R Module Layout -- 6.3 Amplifiers -- 6.4 Switches -- 6.5 Phase Shifter.
6.6 Attenuators -- 6.7 Limiter -- 6.8 Circulator -- 6.9 Correcting Errors through Calibration and Compensation -- References -- Chapter 7 Time Delay in a Corporate-Fed Array -- 7.1 Pulse Dispersion -- 7.2 Phased Array Bandwidth -- 7.3 Time Delay Steering Calculations -- 7.4 Time Delay Units -- 7.5 Unit Cell Constraints -- 7.6 Time Delay Bit Distribution at the Subarray Level -- References -- Chapter 8 Adaptive Arrays -- 8.1 Signal Correlation Matrix -- 8.2 Optimum Array Weights -- 8.3 Adaptive Weights Without Inverting the Correlation Matrix -- 8.4 Algorithms for Nondigital Beamformers -- 8.4.1 Partial Adaptive Nulling -- 8.4.2 Adaptive Nulling with Weight Constraints -- 8.4.3 Adaptive Nulling with Cancellation Beams -- 8.5 Reconfigurable Arrays -- 8.6 Reconfigurable Elements -- 8.7 Time-Modulated Arrays -- 8.8 Adaptive Thinning -- 8.9 Other Adaptive Array Alternatives -- 8.9.1 Beam Switching -- 8.9.2 Direction Finding -- 8.9.3 Retrodirective Array -- 8.9.4 MIMO -- References -- List of Symbols and Abbreviations -- Index -- EULA.
Abstract:
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 arrays. Since timed arrays are designed for realistic time-varying signals and scenarios, the book also reviews wideband signals, baseband and passband RF signals, polarization and signal bandwidth. Other topics covered include time domain, mutual coupling, wideband elements, and dispersion. The author also presents a number of analog and digital beamforming networks for creating and manipulating beams. The book concludes with an overview of the methods to integrate time delay into the array design and of several other adaptive arrays that prove useful in many different systems. Examines RF signal concepts such as polarization and signal bandwidth and their applications to timed antenna arrays Covers arrays of point source, elements in timed antenna arrays, active electronically scanned array technology, and time delay in corporate fed arrays Includes complete design examples for placing time delay in arrays Timed Arrays: Wideband and Time Varying Antenna Arrays is written for practicing engineers and scientists in wireless communication, radar, and remote sensing as well as graduate students and professors interested in advanced antenna topics.
Local Note:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
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Electronic Access:
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