[eBook Code] Circularly Polarized Antennas (eBook Code, 1st)

Preface ix

Acknowledgements xi

Abbreviations and Acronyms xiii

1 Introduction to Circularly Polarized Antennas 1

1.1 Introduction 1

1.2 Antenna Parameters 2

1.3 Basic CP Antenna Types 7

1.4 Antenna Modelling Techniques 23

1.5 Typical Requirements and Challenges in CP Antenna Designs 24

1.6 Summary 25

References 25

2 Small Circularly Polarized Antenna 29

2.1 Introduction 29

2.2 Basic Theory of Antenna Size Reduction 29

2.3 Small CP Patch Antennas 30

2.4 Small Helix, QHAs and PQHAs 46

2.5 Small CP Slot Antennas 53

2.6 Small CP DRAs 59

2.7 Other Small CP Antennas 63

2.8 Summary 66

References 69

3 Broadband Circularly Polarized Antennas 73

3.1 Introduction 73

3.2 Broadband CP Microstrip Patch Antennas 73

3.3 Broadband Helix, QHAs and PQHAs 93

3.4 Spiral Antennas 103

3.5 Broadband CP Slot Antennas 106

3.6 Broadband CP DRAs 116

3.7 Broadband CP Loop Antennas 120

3.8 Other Broadband CP Antennas 123

3.9 Summary 124

References 126

4 Multi-Band Circularly Polarized Antennas 131

4.1 Introduction 131

4.2 Multi-Band CP Microstrip Patch Antennas 131

4.3 Multi-Band QHAs and PQHAs 150

4.4 Multi-Band CP Slot Antennas 158

4.5 Multi-Band CP DRAs 171

4.6 Multi-Band CP Loop Antennas 175

4.7 Other Multi-Band CP Antennas 177

4.8 Summary 186

References 187

5 Circularly Polarized Arrays 191

5.1 Introduction 191

5.2 CP Patch Antenna Arrays 191

5.3 CP Dielectric Resonator Antenna Arrays 203

5.4 CP Slot Array Antenna 210

5.5 CP Printed Reflectarrays 222

5.6 Integrated CP Array and Active CP Array 234

5.7 CP Array with Reconfigurable Beams 243

5.8 Other CP Arrays 252

5.9 Summary 258

References 258

6 Case Studies 263

6.1 Introduction 263

6.2 Dual-Band CP Patch Array for GNSS Reflectometry Receiver on Board Small Satellites 263

6.3 Small Printed Quadrifilar Helix Antenna for Mobile Terminals in Satellite communications 271

6.4 Printed Broadband CP Rectangular Bi-Loop Antenna for RFID Readers 278

6.5 CP Reflectarray for Ka Band Satellite Communications 284

6.6 Circularly Polarized Logarithmic Spiral Antenna with a Wideband Balun 293

6.7 Summary 301

References 303

Index 305