UID:
almafu_9961448768102883
Format:
1 online resource (271 pages)
Edition:
1st ed.
ISBN:
1-63081-818-6
Content:
This book introduces 5 key feeding techniques such as coaxial probe, microstrip, conformal strip, aperture, and coplanar waveguide and covers different shapes of dielectric resonator antennas leading to improvement in circularly polarized (CP) performance. It introduces advancements in the field of dielectric resonator antennas and dilectric resonator antennas (DRAs). Five different types of feeding techniques (i.e. coaxial probe, microstrip, conformal strip, aperture, and coplanar waveguide) are described for obtaining CP followed by two modified shaped DRA (sector DRAs). Throughout this book, rectangular and circular with their modified shapes of the dielectric resonator are utilized, providing differing degrees of freedom as well as different variable parameters, including length, width, height, radius, aspect ratio and dielectric constant, which are tuned to obtain the desired antenna parameters.
Note:
Intro -- Circularly Polarized DielectricResonator Antennas -- Contents -- 1 Introductory Remarks -- 1.1 Introduction to Circular Polarization -- 1.2 Brief Overview of Different Polarization States -- 1.3 History of Dielectric Resonators -- 1.4 Basic Features of Dielectric Resonator Antennas -- 1.5 Circular Polarization in Dielectric Resonator Antennas -- 1.6 Agenda of the Book -- References -- 2 Dielectric Resonator Antenna Theory -- 2.1 Dielectric Resonator as Circuit Element -- 2.2 Dielectric Resonators as Antenna Element -- 2.3 Mode Classification in Dielectric Resonators -- 2.4 Shapes of Dielectric Resonators -- 2.4.1 Hemispherical DRA -- 2.4.2 Cylindrical DRA -- 2.4.3 Rectangular DRA -- 2.5 Coupling Mechanism of Dielectric Resonator Antenna -- 2.5.1 Coaxial Probe Coupling -- 2.5.2 Microstrip Coupling -- 2.5.3 Conformal Coupling -- 2.5.4 Aperture Coupling -- 2.5.5 Coplanar Waveguide Feed Coupling -- 2.6 Circular Polarization Generation Approaches in DRAs -- References -- 3 Circular Polarization Analysis in Dielectric Resonator Antennas Using the Microstrip Coupling Technique -- 3.1 Introduction to the Microstrip Coupling Technique -- 3.2 Design Example Using Microstrip Coupling for CP Generation -- 3.2.1 Antenna Configuration -- 3.2.2 Operating Mechanism -- 3.2.3 Electric-Field Distributions in the Rectangular DRA -- 3.2.4 The Role of Partial Ground Plane -- 3.2.5 Analysis of Simulated Results -- 3.3 CP Generation in Conventional DRA Configurations -- 3.3.1 Single-Point-Fed -- 3.3.2 Single-Point-Fed with Shorted/Open-Ended Stubs -- 3.3.3 Single-Point-Fed along with Parasitic Metallic Plates/Strip -- 3.4 CP Generation in Nonconventional DRA Configurations -- 3.4.1 Single-Point-Fed -- 3.4.2 Dual-Point-Fed -- 3.5 CP Generation in Multiple DRA Configurations -- 3.5.1 Single-Point-Fed -- 3.5.2 Dual-/Multiple-Point-Fed.
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3.6 Microstrip Coupling in MIMO-DRA Configurations for CP -- 3.7 Microstrip Coupling in Array Configurations for CP -- 3.8 Microstrip Coupling in Filtering DRA Configurations -- 3.9 Summary -- References -- 4 Circular Polarization Analysis in Dielectric Resonator Antenna Using Conformal Coupling Technique -- 4.1 Introduction to the Conformal Coupling Technique -- 4.2 Design Methodology of Conformal Coupling Technique CP-DRAs -- 4.2.1 Antenna Element Configuration -- 4.2.2 Operating Mechanism -- 4.2.3 E-field Distributions of the Cylindrical DRA -- 4.2.4 Key Parameter-Feeding Network -- 4.2.5 Simulated Near- and Far-Field Results Analysis -- 4.3 Conformal Coupling in a Conventional DRA -- 4.3.1 Single-Point Conformal-Fed Convention Single DRA -- 4.3.2 Single-Point Conformal-Fed along with Shorted/Open-Ended Stubs on a Single DRA -- 4.3.3 Dual-/Multiple-Point Conformal-Fed on a Single DRA -- 4.4 Conformal Coupling in a Modified DRA for CP Configuration -- 4.4.1 Single-Point Conformal-Fed with a Modified DRA -- 4.4.2 Dual-Point Conformal Fed with a Modified Single DRA -- 4.5 Conformal Coupling in Multiple DRAs for CP Configuration -- 4.5.1 Single-Point Conformal-Fed Multiple DRA -- 4.5.2 Dual-/Multiple-Point Conformal-Fed Multiple DRA -- 4.6 Conformal Strip Coupling in MIMO CP-DRA Configuration -- 4.7 Conformal Coupling Array and Filtering CP-DRA Configuration -- 4.7.1 Conformal Strip-Fed Circularly Polarized DRA Array -- 4.7.2 Conformal Strip-Fed Circularly Polarized DRA Filter -- 4.8 Summary -- References -- 5 Coplanar Waveguide-Fed Dielectric Resonator Antenna for Circular Polarization -- 5.1 Introduction to Coplanar Waveguide Feeding Technique -- 5.2 CP Generation Techniques in DRAs Using CPW Feeding -- 5.3 Design Example for a CPW-Fed Circularly Polarized DRA -- 5.3.1 Antenna Design Methodology and Discussion -- 5.4 Summary -- References.
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6 Aperture-Fed Dielectric Resonator Antennas for Circular Polarization -- 6.1 Introduction to the Aperture Coupling Technique -- 6.2 CP Generation Using Rectangular Slot Coupling -- 6.2.1 Dual-Point Slot-Fed DRAs for Circular Polarization -- 6.2.2 Single-Point Slot-Fed Conventional DRAs for Circular Polarization -- 6.2.3 Single-Point-Fed Multielement Conventional DRAs for CP -- 6.2.4 Single-Point-Fed Nonconventional DRAs for Circular Polarization -- 6.3 CP Generation Using Cross Slot Coupling -- 6.4 CP Generation Using the Annular Slot Coupling Technique -- 6.5 Different Shapes of DRAs Coupled with Modified Slot -- 6.6 Design Example of a Cross-Slot DRA for CP Generation -- 6.7 Circular Polarization in Different Applications of DRAs -- 6.8 Comparison between Various Aperture-Fed Methods -- 6.9 Summary -- References -- 7 Coaxial Probe-Fed Dielectric Resonator Antennas for Circular Polarization -- 7.1 Introduction to the Coaxial Probe-Feeding Technique -- 7.2 CP Generation in Conventional DRAs -- 7.2.1 Dual-Feed Technique -- 7.2.2 Single-Feed Technique -- 7.2.3 Design Example for CP Generation in a Conventional DRA -- 7.3 CP Generation in Nonconventional DRAs -- 7.4 CP Generation in Multielement DRAs -- 7.5 Probe-Fed Circularly Polarized DRAs for Other Applications -- 7.6 Summary -- References -- 8 Sectorization Approach in Dielectric Resonator Antennas for Circular Polarization -- 8.1 Introduction to the Sectorization Technique -- 8.2 The Sectorization Technique in Cylindrical DRAs -- 8.2.1 Mode Nomenclature in Sectored CDRAs -- 8.2.2 Analysis of Circular Polarization in Sectored Cylindrical DRAs -- 8.3 The Sectorization Technique in Hemispherical DRAs -- 8.3.1 Past Research on Sectorization Techniques in Hemispherical DRAs -- 8.3.2 Analysis of Circular Polarization in Sectored HDRAs -- 8.4 A New CP Generation Approach in DRAs Using Sectorization.
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8.4.1 Analysis of Circular Polarization in Modified Geometry -- 8.5 The Sectorization Technique in CP-MIMO Antennas -- 8.6 Summary -- References -- 9 The State of the Art in Circularly Polarized Dielectric Resonator Antennas -- 9.1 Circularly Polarized DRAs in Substrate Integrated Waveguide Technology -- 9.2 Techniques Using Circularly Polarized Liquid DRAs -- 9.3 Miscellaneous Research Areas in Circularly Polarized DRAs -- 9.4 Concluding Remarks -- References -- About the Authors -- Index.
Additional Edition:
ISBN 1-63081-817-8
Language:
English
Keywords:
Electronic books.
