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Fixed and Mobile Terminal Antennas : Antennas & Propagation Library - A. Kumar

Fixed and Mobile Terminal Antennas

Antennas & Propagation Library

By: A. Kumar

Hardcover

Published: 19th September 1991
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This critical review looks at state-of-the-art mobile and fixed antennas, combining theory and practical design data. The text examines the subject of mobile terminals from the perspectives of market demand, systems concepts, services, applications and space service areas, including possible MSAT antenna configurations and L-band beam coverage for North America. This book should appeal to senior engineers, managers, designers and scientists in the field of mobile satellite communication.

Prefacep. xi
Introductionp. 1
Backgroundp. 1
Demand and Market Overviewp. 3
System Conceptp. 8
Frequency Bandp. 11
Services and Applicationsp. 12
Mobile Radio Service (MRS)p. 13
Mobile Data Service (MDS)p. 14
Mobile Telephone Service (MTS)p. 14
Vehicle Location Service (VLS)p. 16
Vehicle Location and Information Service (VLIS)p. 17
Mobile Aeronautical Service (MAS)p. 17
Typical End-User Applicationsp. 18
Space Segmentp. 18
General Descriptionp. 18
Service Areap. 22
Possible Antenna Configurations and L-Band Antenna Beamsp. 23
Referencesp. 24
Mobile Satellite Antennasp. 27
Introductionp. 27
Directly Radiating Array Antennasp. 27
Computed Results and Descriptionp. 31
Advantages and Disadvantages of Directly Radiating Arraysp. 35
Imaging Single-Reflector Antennap. 37
Application of a Single-Reflector Antenna for MSATp. 43
Deployable Reflectorsp. 49
Feed Array for MSAT Reflector Antennasp. 50
Advantages and Disadvantages of a Single-Aperture Imaging Reflector Antenna over a Directly Radiating Arrayp. 60
Imaging Dual-Reflector Systemp. 60
Short Description of Analysis Methodsp. 62
Computed Resultsp. 66
Discussions on Imaging Dual-Reflector Systemsp. 73
Advantages and Disadvantagesp. 73
Referencesp. 74
Antenna Specifications and Fixed Terminal Antennasp. 77
Introductionp. 77
Low-Gain Antennas and Specifications for Data Communication Applicationsp. 77
Medium- and High-Gain Antennas for Mobile Voice Terminalsp. 81
Medium-and High-Gain Antennas and Specifications for Fixed Terminalsp. 82
Helical Antennasp. 83
Introductionp. 83
Geometry of the Helixp. 84
Radiation Pattern Calculationsp. 86
Axial Ratio Calculationsp. 87
Design and Resultsp. 87
Cavity-Backed Antennasp. 95
Cup Crossed-Dipole Radiatorp. 96
General Descriptionp. 96
Crossed-Dipole Optimizationp. 97
Short Backfire Antennas (SBFA)p. 102
General Descriptionp. 102
Application of SBFA as INMARSAT-M Terminal Antennap. 104
Referencesp. 113
Propagation in the Land Mobile Satellite Servicep. 117
Introductionp. 117
Why Linear Polarization is not Usedp. 118
Reflection From Ground, Terrain, and Utility Polesp. 120
Power Level and Interference under Various Ground Conditionsp. 123
Measured Resultsp. 124
Prairie Locationp. 126
Utility Polesp. 128
Roadside Rocky Wall or Mountainp. 130
Effect of Trees on Mobile Terminalsp. 136
Effect of Elevation Anglep. 138
Roadside Buildingsp. 149
Bandwidth Considerationsp. 152
Comparison of Resultsp. 154
System Performance at Different Sitesp. 159
Referencesp. 159
Low-Gain Mobile Data-Link Antennasp. 163
Introductionp. 163
Quadrifilar Helicesp. 163
Generalp. 163
Classification of Quadrifilar Helix Antennap. 164
Feeding Arrangement of Helicesp. 166
Bifilar Helix to Quadrifilarp. 166
Analysis of Quadrifilar Helixp. 172
Comparison between Measured and Theoretical Resultsp. 182
Development of Low-Gain Quadrifilar Helical Antennasp. 183
Crossed-Drooping Dipolep. 194
Design of the Antennap. 194
Classification of the Drooping Dipole Antennap. 198
Curved-Shaped Type Crossed-Dipole Antennap. 198
Inverted V-Type Drooping Dipolesp. 207
Inverted U-Type Drooping Dipolesp. 210
Spiral Antennasp. 212
Microstrip Antennasp. 216
Microstrip Disk Antenna Elementp. 216
Resonant Frequenciesp. 217
Radiation Patternsp. 218
Microstrip Stacked Radiatorsp. 223
Referencesp. 232
Medium-Gain Mobile Voice-Link Antennasp. 237
Introductionp. 237
Mechanically Steered Tracking Antennasp. 237
Tilted Linear Arrayp. 238
Mechanism for Mechanically Steering the Vehicle Antennap. 241
Reduced Height Tilted Linear Arrayp. 244
Planar Yagi-Uda Arrayp. 247
Hybrid Mechanically and Electronically Steered Planar Arrayp. 251
Anserlin Antenna Arrayp. 255
Electronic Beam Squint (EBS) Techniquep. 258
Electronically Steered Arraysp. 259
Lens-Fed Antennasp. 260
Introductionp. 260
Geometry of RKR Lensp. 264
Description of RKR Arrayp. 265
RKR Lens Array Analysisp. 267
Array Performance and Tracking Mechanismp. 267
Electronically Steered Parasitic Elements Adaptive Arrayp. 273
Introductionp. 273
Analysis of a Parasitic Dipole Arrayp. 275
Resultsp. 277
Microstrip Adaptive Arrayp. 281
Analysis of Microstrip Adaptive Arrayp. 281
Theoretical and Experimental Resultsp. 283
Monopole Element Adaptive Arrayp. 288
Performance of Monopole Adaptive Arrayp. 293
Electronically Steered Phased-Array Antennasp. 308
Ball Designp. 309
Beam-Steering Control Circuitry and Performancep. 311
Teledyne Ryan Designp. 311
Antenna Performancep. 312
Other Electronically Steered Planar Phased-Array Antennasp. 314
Electronically Steerable Spherical Array Antennap. 317
Antenna Performancep. 319
Referencesp. 322
Noise Temperature and G/T of Mobile Antennasp. 327
Introductionp. 327
Sources of Noise Temperaturep. 327
Measurement Techniques for Antenna Noise Temperaturep. 330
Hot-Cold Techniquep. 330
Deep Space Network Techniquep. 332
Comparison of Hot-Cold and DSN Techniquesp. 333
MSAT-X Techniquep. 334
Error Analysisp. 336
Comparison of DSN and MSAT-X Techniquesp. 336
Antenna Noise Temperature Resultsp. 337
G/T Values of Mobile Antennasp. 344
Referencesp. 345
Author Indexp. 347
Subject Indexp. 353
Table of Contents provided by Syndetics. All Rights Reserved.

ISBN: 9780890064382
ISBN-10: 0890064385
Series: Antennas & Propagation Library
Audience: General
Format: Hardcover
Language: English
Number Of Pages: 372
Published: 19th September 1991
Publisher: Artech House Publishers
Country of Publication: US
Dimensions (cm): 22.9 x 15.2  x 2.5
Weight (kg): 0.72