Dielectric Resonator Antennas
[...]... 207 208 Low-Profile Dielectric Resonator Antennas By Karu Esselle Introduction Linearly polarised rectangular DR antennas Aperture-coupled rectangular DR antennas Co-planar waveguide-fed rectangular DR antennas Circularly polarised rectangular DR antennas Linearly polarised circular disk DR antennas Circularly polarised dielectric disk antennas Linearly polarised triangular DR antennas Circularly polarised... 7.5.1 7.5.2 7.5.3 7.6 240 241 Compact Circular Sector and Annular Sector Dielectric Resonator Antennas For Wireless Communication Handsets By R D Murch and T K K Tam Introduction Challenges Approaches Section Summary Dielectric resonator antennas Features Geometries Resonant modes Circular cylindrical DRAs Excitation schemes Dielectric resonator antenna modelling Compact circular sector and annular sector... conclusions References CHAPTER 10 Leaky-Wave Dielectric Resonator Antennas Based on NRD Guides By K M Luk and M T Lee 10.1 Introduction 10.1.1 Antennas based on NRD guides 10.1.1.1 Feeding methods 10.1.1.2 Generation of leaky waves 10.1.2 Leaky-wave antennas using asymmetric NRD guide 10.1.2.1 Principle of operation 10.1.2.2 Applications 10.2 Leaky-wave dielectric resonator antennas based on symmetric image NRD... ratio cross dielectric resonator antenna cross-polarisation impedance 1 CHAPTER 1 Overview of the Dielectric Resonator Antenna Kowk Wa Leung* and Stuart A Long+ * Department of Electronic Engineering City University of Hong Kong Kowloon, Hong Kong SAR + Department of Electrical and Computer Engineering University of Houston TX 77204-4005, USA 1.1 INTRODUCTION For many years, the dielectric resonator. .. leaky-wave DRA 10.2.2.1 Experimental results 10.2.2.2 Discussion 10.2.3 Summary 10.3 Leaky-wave dielectric resonator antennas based on asymmetric NRD guides 10.3.1 Using asymmetric inverted T-shaped dielectric slab 10.3.1.1 Experimental results 10.3.1.2 Summary and discussion 10.3.2 Using staircase-shaped dielectric slab 10.3.2.1 Experimental results 10.3.2.2 Discussion 10.4 Conclusion Acknowledgement... GTD H HE HEM HFSS array factor axial ratio body of revolution bandwidth circular polarisation co-planar waveguide co-polarisation decibel diffraction coefficient dielectric body of revolution direction of arrival dielectric resonator dielectric resonator antenna electric field frequency normalised frequency finite-difference time-domain finite-element method geometric optics global positioning system... antenna with a dielectric coating Green’s-function formulation Numerical results and discussion A slot-coupled DR antenna with a dielectric coating Theoretical formulation Numerical results and discussion References CHAPTER 4 60 61 64 67 67 69 70 72 72 73 74 76 77 81 88 89 93 94 94 100 101 104 106 108 112 112 120 124 Body of Revolution (BOR) - Analysis of Cylindrical Dielectric Resonator Antennas By Ahmed... original paper on the cylindrical dielectric resonator antenna (DRA) [5] was published in 1983 At that time, it was observed that the frequency range of interest for many systems had gradually progressed upward to the millimeter and near-millimeter range (100-300 GHz) At these frequencies, the conductor loss of metallic antennas becomes severe and the efficiency of the antennas is reduced significantly... Acknowledgement References Miscellaneous references CHAPTER 5 5.1 5.2 5.3 5.3.1 5.3.2 5.3.3 5.4 5.4.1 5.4.2 5.4.3 5.4.4 5.5 5.5.1 5.5.2 5.6 6.1 6.2 6.2.1 6.2.2 6.3 6.4 6.5 6.6 6.7 Broadband Dielectric Resonator Antennas By Aldo Petosa, Apisak Ittipiboon, Yahia Antar Introduction Bandwidth of rectangular and cylindrical DRAs Bandwidth enhancement with single DRAs Probe-fed rectangular DRA with air gap... circular polarisation low-noise amplifier longitudinal section electric xvi LSM ME MoM MSDRA NRD Pn (x) longitudinal section magnetic modal expansion method of moments multi-segment dielectric resonator antenna non-radiative dielectric Lengendre polynominal of order n Pnm (x) associated Lengendre function of the first kind of order m and PCS PD PMWM PWS Q-factor RF RHCP SDM SWR TE TEM TLM TM VSWR XDRA . 11. Dielectric Resonator Antennas Edited by K. M. Luk and K. W. Leung 12. Antennas for Information Super-Skyways P. S. Neelakanta and R. Chatterjee Dielectric Resonator Antennas. Data Dielectric resonator antennas / edited by K.M. Luk and K.W. Leung. p. cm. Includes bibliographical references and index. ISBN 0-86380-263-X 1. Microwave antennas. 2. Dielectric resonators would attract more system engineers to choose dielectric resonator antennas when designing their wireless products. Although dielectric resonator antennas are so promising in practical applications,