Fixed and Mobile Terminal Antennas

By: A. Kumar

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Hardcover | 1 September 1991

At a Glance

Hardcover
372 Pages

Dimensions(cm)
24.13 x 16.51 x 2.54

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$368.75

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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.

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Non-Fiction Engineering & Technology Electronics & Communications Engineering Communications Engineering & Telecommunications Satellite Communication Technology in General

Preface	p. xi
Introduction	p. 1
Background	p. 1
Demand and Market Overview	p. 3
System Concept	p. 8
Frequency Band	p. 11
Services and Applications	p. 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 Applications	p. 18
Space Segment	p. 18
General Description	p. 18
Service Area	p. 22
Possible Antenna Configurations and L-Band Antenna Beams	p. 23
References	p. 24
Mobile Satellite Antennas	p. 27
Introduction	p. 27
Directly Radiating Array Antennas	p. 27
Computed Results and Description	p. 31
Advantages and Disadvantages of Directly Radiating Arrays	p. 35
Imaging Single-Reflector Antenna	p. 37
Application of a Single-Reflector Antenna for MSAT	p. 43
Deployable Reflectors	p. 49
Feed Array for MSAT Reflector Antennas	p. 50
Advantages and Disadvantages of a Single-Aperture Imaging Reflector Antenna over a Directly Radiating Array	p. 60
Imaging Dual-Reflector System	p. 60
Short Description of Analysis Methods	p. 62
Computed Results	p. 66
Discussions on Imaging Dual-Reflector Systems	p. 73
Advantages and Disadvantages	p. 73
References	p. 74
Antenna Specifications and Fixed Terminal Antennas	p. 77
Introduction	p. 77
Low-Gain Antennas and Specifications for Data Communication Applications	p. 77
Medium- and High-Gain Antennas for Mobile Voice Terminals	p. 81
Medium-and High-Gain Antennas and Specifications for Fixed Terminals	p. 82
Helical Antennas	p. 83
Introduction	p. 83
Geometry of the Helix	p. 84
Radiation Pattern Calculations	p. 86
Axial Ratio Calculations	p. 87
Design and Results	p. 87
Cavity-Backed Antennas	p. 95
Cup Crossed-Dipole Radiator	p. 96
General Description	p. 96
Crossed-Dipole Optimization	p. 97
Short Backfire Antennas (SBFA)	p. 102
General Description	p. 102
Application of SBFA as INMARSAT-M Terminal Antenna	p. 104
References	p. 113
Propagation in the Land Mobile Satellite Service	p. 117
Introduction	p. 117
Why Linear Polarization is not Used	p. 118
Reflection From Ground, Terrain, and Utility Poles	p. 120
Power Level and Interference under Various Ground Conditions	p. 123
Measured Results	p. 124
Prairie Location	p. 126
Utility Poles	p. 128
Roadside Rocky Wall or Mountain	p. 130
Effect of Trees on Mobile Terminals	p. 136
Effect of Elevation Angle	p. 138
Roadside Buildings	p. 149
Bandwidth Considerations	p. 152
Comparison of Results	p. 154
System Performance at Different Sites	p. 159
References	p. 159
Low-Gain Mobile Data-Link Antennas	p. 163
Introduction	p. 163
Quadrifilar Helices	p. 163
General	p. 163
Classification of Quadrifilar Helix Antenna	p. 164
Feeding Arrangement of Helices	p. 166
Bifilar Helix to Quadrifilar	p. 166
Analysis of Quadrifilar Helix	p. 172
Comparison between Measured and Theoretical Results	p. 182
Development of Low-Gain Quadrifilar Helical Antennas	p. 183
Crossed-Drooping Dipole	p. 194
Design of the Antenna	p. 194
Classification of the Drooping Dipole Antenna	p. 198
Curved-Shaped Type Crossed-Dipole Antenna	p. 198
Inverted V-Type Drooping Dipoles	p. 207
Inverted U-Type Drooping Dipoles	p. 210
Spiral Antennas	p. 212
Microstrip Antennas	p. 216
Microstrip Disk Antenna Element	p. 216
Resonant Frequencies	p. 217
Radiation Patterns	p. 218
Microstrip Stacked Radiators	p. 223
References	p. 232
Medium-Gain Mobile Voice-Link Antennas	p. 237
Introduction	p. 237
Mechanically Steered Tracking Antennas	p. 237
Tilted Linear Array	p. 238
Mechanism for Mechanically Steering the Vehicle Antenna	p. 241
Reduced Height Tilted Linear Array	p. 244
Planar Yagi-Uda Array	p. 247
Hybrid Mechanically and Electronically Steered Planar Array	p. 251
Anserlin Antenna Array	p. 255
Electronic Beam Squint (EBS) Technique	p. 258
Electronically Steered Arrays	p. 259
Lens-Fed Antennas	p. 260
Introduction	p. 260
Geometry of RKR Lens	p. 264
Description of RKR Array	p. 265
RKR Lens Array Analysis	p. 267
Array Performance and Tracking Mechanism	p. 267
Electronically Steered Parasitic Elements Adaptive Array	p. 273
Introduction	p. 273
Analysis of a Parasitic Dipole Array	p. 275
Results	p. 277
Microstrip Adaptive Array	p. 281
Analysis of Microstrip Adaptive Array	p. 281
Theoretical and Experimental Results	p. 283
Monopole Element Adaptive Array	p. 288
Performance of Monopole Adaptive Array	p. 293
Electronically Steered Phased-Array Antennas	p. 308
Ball Design	p. 309
Beam-Steering Control Circuitry and Performance	p. 311
Teledyne Ryan Design	p. 311
Antenna Performance	p. 312
Other Electronically Steered Planar Phased-Array Antennas	p. 314
Electronically Steerable Spherical Array Antenna	p. 317
Antenna Performance	p. 319
References	p. 322
Noise Temperature and G/T of Mobile Antennas	p. 327
Introduction	p. 327
Sources of Noise Temperature	p. 327
Measurement Techniques for Antenna Noise Temperature	p. 330
Hot-Cold Technique	p. 330
Deep Space Network Technique	p. 332
Comparison of Hot-Cold and DSN Techniques	p. 333
MSAT-X Technique	p. 334
Error Analysis	p. 336
Comparison of DSN and MSAT-X Techniques	p. 336
Antenna Noise Temperature Results	p. 337
G/T Values of Mobile Antennas	p. 344
References	p. 345
Author Index	p. 347
Subject Index	p. 353
Table of Contents provided by Syndetics. All Rights Reserved.

Fixed and Mobile Terminal Antennas

At a Glance

Hardcover

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