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Wireless communications have advanced significantly over the past two decades. The multiple-input-multiple-output (MIMO) technology was proposed in the 1990's as a viable solution that can overcome the data rate limit experienced by single-input-single-output (SISO) systems. This resource is fo...

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor principal: Sharawi, Mohammad S.
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Boston : Artech House, [2014]
Temas:
MIMO systems.
Antennas (Electronics)
Systèmes à entrées multiples et à sorties multiples.
Antennes (Électronique)
TECHNOLOGY & ENGINEERING / Mechanical
Acceso en línea:Texto completo
Tabla de Contenidos:
  • 1 Introduction 1
  • 1.1 Wireless Technology Evolution 1
  • 1.2 Multiple-Input-Multiple-Output (MIMO) Technology 5
  • 1.3 Market Forecasts 8
  • 1.4 Conclusions 8
  • References 9
  • 2 Antenna Fundamentals 11
  • 2.1 Radiation Mechanism 11
  • 2.2 Single Antenna Parameters 15
  • 2.2.1 Resonance 15
  • 2.2.2 Radiation Patterns 18
  • 2.2.3 Directivity 18
  • 2.2.4 Efficiency 19
  • 2.2.5 Gain 21
  • 2.2.6 Polarization 21
  • 2.3 MIMO Antenna Parameters 23
  • 2.3.1 Total Active Reflection Coefficient 23
  • 2.3.2 Isolation 25
  • 2.3.3 Correlation Coefficient 25
  • 2.3.4 Mean Effective Gain 27
  • 2.3.5 Diversity Gain 30
  • 2.3.6 Branch Power Ratio 32
  • 2.3.7 System Capacity 32
  • 2.4 Printed Antenna Types 36
  • 2.4.1 Printed Dipole Antennas 37
  • 2.4.2 Printed Monopole Antennas 42
  • 2.4.3 Printed Loop Antennas 42
  • 2.4.4 Printed Patch Antennas 46
  • 2.4.5 Printed Inverted-F Antenna 53
  • 2.4.6 Other Primed Antenna Structures 57
  • 2.5 Antenna Integration Effects 58
  • 2.5.1 Effect of PCB Ground Plane 58
  • 2.5.2 Effect of Mobile Terminal Casing 60
  • 2.5.3 Effect of the Presence of User's Hand and Head 60
  • 2.6 Antenna Arrays 63
  • 2.7 Conclusion 69
  • References 69
  • 3 Electrically Small Printed Antennas 17
  • 3.1 Features of Electrically Small Antennas 77
  • 3.1.1 The Quality Factor (Q) 78
  • 3.1.2 Maximum Gain (Gmax) 82
  • 3.1.3 Efficiency 84
  • 3.1.4 Radiation Patterns 85
  • 3.2 ESA Examples 85
  • 3.2.1 Meander Line ESAs 85
  • 3.2.2 Loop and Spiral ESAs 89
  • 3.2.3 Other Printed Geometries for ESAs 91
  • 3.3 Conclusions 96
  • References 100
  • 4 Printed Single-Band MIMO Antenna Systems 103
  • 4.1 MIMO Antennas for Access Points and General Applications 103
  • 4.2 MIMO Antennas for Cellular and Smartphones 111
  • 4.3 MEMO Antennas for Large PCs and Tablets 122
  • 4.4 MIMO Antennas for USB Dongles 134
  • 4.5 Conclusions 140
  • References 144
  • 5 Multiband Printed MIMO Antenna Systems 151
  • 5.1 Printed Multiband MIMO Antenna Systems for Wireless Access Points and Generic Applications 152
  • 5.2 Printed Multiband MIMO Antennas for Mobile Phones 163
  • 5.3 Muitiband Printed MIMO Antennas for Portable Computers 185
  • 5.4 Mulriband MIMO Antennas for USB Dongle Applications 191
  • 5.5 Design Guidelines for Muitiband Printed MIMO Antennas 196
  • 5.6 Conclusions 205
  • References 207
  • 6 Isolation Enhancement Techniques for Printed MIMO Antenna Systems 215
  • 6.1 Antenna Placement and Orientation 216
  • 6.2 Decoupling Networks 224
  • 6.3 Parasitic Elements 234
  • 6.4 Defected Ground Structures 243
  • 6.5 Neutralization Lines 253
  • 6.6 Metamarerial-Based Isolation Enhancement Structures 259
  • 6.7 Conclusions 266
  • References 270
  • 7 MIMO Antenna Performance Measurements 273
  • 7.1 Conventional Antenna Measurement Methods 273
  • 7.1.1 S-Parameter Measurements 274
  • 7.1.2 Antenna Radiation Pattern Measurements 274
  • 7.2 MIMO Antenna Performance Measurement Technique 277
  • 7.2.1 The Anechoic Chamber Multiprobe OTA Method 278
  • 7.2.2 The Two-Stage OTA Method 279
  • 7.2.3 Reverberation Chamber OTA Method 281
  • 7.3 Remarks on MIMO OTA Testing 283
  • 7.4 Conclusions 285
  • References 285.

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