Broadband planar antennas: design and applications

Zhi Ning Chen, Michael Yan Wah Chia0470871741, 9780470871744

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.

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Table of contents :
Broadband Planar Antennas……Page 3
Contents……Page 9
Foreword……Page 11
Preface……Page 13
Acknowledgements……Page 15
1.1 Introduction……Page 17
1.2 Bandwidth Definitions……Page 18
1.2.2 Pattern Bandwidth……Page 19
1.2.3 Polarization or Axial-ratio Bandwidth……Page 20
1.3.1 Suspended Plate Antennas……Page 21
1.3.2 Bent Plate Antennas……Page 26
1.4 Overview of this Book……Page 30
References……Page 31
2.1 Introduction……Page 33
2.2.2 Substrates……Page 36
2.2.3 Feeding Structures……Page 37
2.2.4 Example: Rectangular Microstrip Patch Antennas……Page 39
2.3.1 Lowering the Q……Page 47
2.3.2 Using an Impedance Matching Network……Page 48
2.3.3 Case Study: Microstrip Patch Antenna with Impedance Matching Stub……Page 50
2.3.4 Introducing Multiple Resonances……Page 53
2.3.5 Case Study: Microstrip Patch Antenna with Stacked Elements……Page 55
References……Page 59
3.1 Introduction……Page 63
3.2.1 Capacitive Load……Page 65
3.2.2 Slotted Plates……Page 67
3.2.3 Case Study: SPA with an W-shaped Slot……Page 68
3.2.4 Electromagnetic Coupling……Page 72
3.2.5 Nonplanar Plates……Page 75
3.2.6 Vertical Feed Sheet……Page 78
3.3 Techniques to Enhance Radiation Performance……Page 81
3.3.1 Radiation Characteristics of SPAs……Page 82
3.3.2 SPA with Dual Feed Probes……Page 88
3.3.3 Case Study: Center-concaved SPA with Dual Feed Probes……Page 91
3.3.4 SPA with Half-wavelength Probe-fed Strip……Page 93
3.3.5 SPA with Probe-fed Center Slot……Page 97
3.3.6 Case Study: Center-fed SPA with Double L-shaped Probes……Page 108
3.3.7 SPA with Slots and Shorting Strips……Page 116
3.4 Arrays with Suspended Plate Elements……Page 127
3.4.1 Mutual Coupling between Two Suspended Plate Elements……Page 128
3.4.2 Reduced-size Array above Double-tiered Ground Plane……Page 133
References……Page 147
4.1 Introduction……Page 151
4.2 The Inverted-L/F Antenna……Page 153
4.3.1 Planar Inverted-F Antenna……Page 157
4.3.2 Planar Inverted-L Antenna……Page 160
4.4.1 Handset Antennas……Page 170
4.4.2 Laptop Computer Antennas……Page 187
References……Page 190
5.1 Introduction……Page 195
5.2.2 Planar Monopoles……Page 197
5.2.3 Roll Monopoles……Page 199
5.2.4 EMC Feeding Methods……Page 208
5.3.1 Ultra-wideband Technology……Page 209
5.3.2 Considerations for UWB Antennas and Source Pulses……Page 211
5.3.3 Planar UWB Antenna and Assessment……Page 228
5.4 Case Studies……Page 234
5.4.1 Planar UWB Antenna Printed on a PCB……Page 236
5.4.2 Planar UWB Antenna Embedded into a Laptop Computer……Page 243
5.4.3 Planar Directional UWB Antenna……Page 248
References……Page 253
Index……Page 257