The increasing demand for wireless communications has revolutionised the lifestyle of today’s society and one of the key components of wireless technology is antenna design. Broadband planar antennas are the newest generation of antennas boasting the attractive features required, such as broad operating bandwidth, low profile, light weight, low cost and ease of integration into arrays or Radio Frequency (RF) circuits, to make them ideal components of modern communications systems. Research into small and broadband antennas has been spurred by the rapid development of portable wireless communication devices such as cell phones, laptops and personal digital assistants.
This all-encompassing volume, Broadband Planar Antennas: Design and Applications, systematically describes the techniques for all planar antennas from microstrip patch antennas, suspended plate antennas and planar inverted-L/F antennas to planar dipole antennas. Also discussed are some of the most recent outcomes such as broadband antenna issues in promising ultra-wideband applications.
- Clearly describes the fundamentals of planar antennas and categorises them according to their radiation characteristics
- Introduces the advanced progress in broadband planar antennas for modern wireless communications
- Includes a wealth of case studies, design guidelines, figures and tables
This text is essential reading for antenna, RF and microwave engineers and manufacturers within the telecommunications industry. Its highly accessible approach will also appeal to researchers, postgraduate students and academic lecturers.
Author(s): Zhi Ning Chen, Michael Yan Wah Chia
Publisher: Wiley
Year: 2006
Language: English
Pages: 261
Broadband Planar Antennas......Page 1
Contents......Page 10
Foreword......Page 12
Preface......Page 14
Acknowledgements......Page 16
1.1 Introduction......Page 18
1.2 Bandwidth Definitions......Page 19
1.2.2 Pattern Bandwidth......Page 20
1.2.3 Polarization or Axial-ratio Bandwidth......Page 21
1.3.1 Suspended Plate Antennas......Page 22
1.3.2 Bent Plate Antennas......Page 27
1.4 Overview of this Book......Page 31
References......Page 32
2.1 Introduction......Page 34
2.2.2 Substrates......Page 37
2.2.3 Feeding Structures......Page 38
2.2.4 Example: Rectangular Microstrip Patch Antennas......Page 40
2.3.1 Lowering the Q......Page 48
2.3.2 Using an Impedance Matching Network......Page 49
2.3.3 Case Study: Microstrip Patch Antenna with Impedance Matching Stub......Page 51
2.3.4 Introducing Multiple Resonances......Page 54
2.3.5 Case Study: Microstrip Patch Antenna with Stacked Elements......Page 56
References......Page 60
3.1 Introduction......Page 64
3.2.1 Capacitive Load......Page 66
3.2.2 Slotted Plates......Page 68
3.2.3 Case Study: SPA with an W-shaped Slot......Page 69
3.2.4 Electromagnetic Coupling......Page 73
3.2.5 Nonplanar Plates......Page 76
3.2.6 Vertical Feed Sheet......Page 79
3.3 Techniques to Enhance Radiation Performance......Page 82
3.3.1 Radiation Characteristics of SPAs......Page 83
3.3.2 SPA with Dual Feed Probes......Page 89
3.3.3 Case Study: Center-concaved SPA with Dual Feed Probes......Page 92
3.3.4 SPA with Half-wavelength Probe-fed Strip......Page 94
3.3.5 SPA with Probe-fed Center Slot......Page 98
3.3.6 Case Study: Center-fed SPA with Double L-shaped Probes......Page 109
3.3.7 SPA with Slots and Shorting Strips......Page 117
3.4 Arrays with Suspended Plate Elements......Page 128
3.4.1 Mutual Coupling between Two Suspended Plate Elements......Page 129
3.4.2 Reduced-size Array above Double-tiered Ground Plane......Page 134
References......Page 148
4.1 Introduction......Page 152
4.2 The Inverted-L/F Antenna......Page 154
4.3.1 Planar Inverted-F Antenna......Page 158
4.3.2 Planar Inverted-L Antenna......Page 161
4.4.1 Handset Antennas......Page 171
4.4.2 Laptop Computer Antennas......Page 188
References......Page 191
5.1 Introduction......Page 196
5.2.2 Planar Monopoles......Page 198
5.2.3 Roll Monopoles......Page 200
5.2.4 EMC Feeding Methods......Page 209
5.3.1 Ultra-wideband Technology......Page 210
5.3.2 Considerations for UWB Antennas and Source Pulses......Page 212
5.3.3 Planar UWB Antenna and Assessment......Page 229
5.4 Case Studies......Page 235
5.4.1 Planar UWB Antenna Printed on a PCB......Page 237
5.4.2 Planar UWB Antenna Embedded into a Laptop Computer......Page 244
5.4.3 Planar Directional UWB Antenna......Page 249
References......Page 254
Index......Page 258
