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Analysis Of Rectangular Dielectric Resonator Antennas Excited Through A Slot Over A Finite Ground Plane
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Book Synopsis Analysis of Rectangular Dielectric Resonator Antennas Excited Through a Slot Over a Finite Ground Plane by :
Download or read book Analysis of Rectangular Dielectric Resonator Antennas Excited Through a Slot Over a Finite Ground Plane written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, the Dielectric Resonator Antenna (DRA) radiating element has been the subject of considerable interest due to its small size and high efficiency. The rigorous analysis of DRA elements, however, has been largely restricted to rotationally symmetric shapes. Other shapes have been analyzed, however, often based on an infinite ground plane assumption which restricts the use of the DRA as a single element for some applications that require finite size ground plane. Various numerical techniques have been used in the analysis of the DRA. The spherical mode expansion was used to analyze a hemispherical DRA. The Surface Integral Equation with the Method of Moments (SIE/MoM) has been used to analyze a rotationally symmetric DRA. The modal expansion method with some approximation was used in to analyze the rectangular DRA, and the Finite Difference Time Domain (FDTD) method has been used to analyze a rectangular DRA and cylindrical DRA with a staircased cell approximation. Here the rectangular DRA is considered over a finite ground plane with a microstrip slot excitation. The SIE/MoM is used with the RWG triangle basis function expansion. Using the triangle basis functions allows modeling of arbitrarily shaped objects. Also, the FDTD method is used to analyze the same problem for the purpose of verifying both methods. The effect of the ground plane size and the dielectric substrate truncation is studied.
Book Synopsis Rectangular Dielectric Resonator Antennas by : Rajveer S. Yaduvanshi
Download or read book Rectangular Dielectric Resonator Antennas written by Rajveer S. Yaduvanshi and published by Springer. This book was released on 2015-09-24 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers resonating modes inside device and gives insights into antenna design, impedance and radiation patterns. It discusses how higher-order modes generation and control impact bandwidth and antenna gain. The text covers new approaches in antenna design by investigation hybrid modes, H_Z and E_Z fields available simultaneously, and analysis and modelling on modes with practical applications in antenna design. The book will be prove useful to students, researchers and professionals alike.
Book Synopsis Topics From EPR Research by : Ahmed M. Maghraby
Download or read book Topics From EPR Research written by Ahmed M. Maghraby and published by BoD – Books on Demand. This book was released on 2019-02-13 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron paramagnetic resonance (EPR) spectroscopy has become one of the leading spectroscopic techniques. It targets materials containing unpaired electrons and possesses many applications. Since it was discovered more than 70 years ago, EPR spectroscopy is subjected to uninterrupted development and comprehensive studies. This book represents some of recent topics from EPR research.
Book Synopsis Dielectric Resonator Antenna Handbook by : Aldo Petosa
Download or read book Dielectric Resonator Antenna Handbook written by Aldo Petosa and published by Artech House Publishers. This book was released on 2007 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, more and more antenna engineers are viewing the Dielectric Resonator Antenna (DRA) as a preferable alternative to conventional low-gain designs because of several attractive features, including high radiation, light weight, small size and low profile. This practical resource presents complete, up-to-date details on DRAs in a single volume. The book provides professionals with clear guidance on the mode of operation and radiation behavior of DRAs, the main methods of excitation, and the major advances in DRA technology. This hands-on reference equips engineers with simple equations and graphs that help them rapidly design DRAs, without the need for complex analytical or numerical calculations. Numerous design examples are included to give practitioners a sense of the versatility that DRAs afford.
Book Synopsis Rectangular Dielectric Resonator Antennas Fed by Dielectric Image Guide by : Asem S. Al-Zoubi
Download or read book Rectangular Dielectric Resonator Antennas Fed by Dielectric Image Guide written by Asem S. Al-Zoubi and published by . This book was released on 2008 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: A linear array of rectangular dielectric resonator antenna (DRA) is studied. The array is excited by a dielectric image guide. The advantages of using the dielectric image guide (DIG) are the low losses at high frequencies, and wideband performance. Two different methods of coupling between the dielectric resonator elements and the image guide are investigated. The first method of coupling is to couple the image guide to narrow apertures (slots) that are in turn exciting the dielectric resonator elements. Two problems are found in this design. First, this design causes high return losses around the slot resonances. This problem is resolved by adding a reflection cancelling slot near each main slot. The second problem is the high back radiation. This problem is resolved also by using a conducting reflector on the DIG feeding side of the antenna. The second method of excitation is the proximity coupling method between the dielectric resonator antennas and the DIG. Coupling analysis and design of single element and two different arrays are performed. It is found that this design achieve low back radiation, but high cross polarization. The cross polarization is reduced by suppressing some high order modes that are excited in the DRA elements. This suppression of these modes is performed by wrapping the middle of each DRA by a conducting strip. The coupling between the DRA and the DIG is controlled by the separation distance between them. A Dolph-Chebyshev amplitude distribution is used to control the sidelobe level of the far field radiation patterns. A prototype was build for each design from a 7-element array. The measured and computed results are in good agreement. Two 15-elemet arrays are studied numerically and show that to improve the antenna efficiency, and a reasonable number of elements must be used to couple most of the input power to the radiating elements.
Book Synopsis Dielectric Resonator Antennas by : Kwai Man Luk
Download or read book Dielectric Resonator Antennas written by Kwai Man Luk and published by Research Studies Press Limited. This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of dielectric resonator as a resonant antenna was proposed in 1983. Due to the absence of metallic loss, the dielectric resonator antenna (DRA) is highly efficient when operated at millimetre wave frequencies. With the use of high dielectric constant material, the DRA can also be used as a small and low profile antenna operated at low microwave frequencies. Low cost dielectric materials are now easily available commercially, encouraging more antenna engineers to design communication systems with DRAs.
Book Synopsis 2000 IEEE Antennas and Propagation Society International Symposium by : IEEE Antennas and Propagation Society. International Symposium
Download or read book 2000 IEEE Antennas and Propagation Society International Symposium written by IEEE Antennas and Propagation Society. International Symposium and published by . This book was released on 2000 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Networks, Security and Communications: Reviews, Vol. 2 by : Sergey Yurish
Download or read book Advances in Networks, Security and Communications: Reviews, Vol. 2 written by Sergey Yurish and published by Lulu.com. This book was released on 2020-02-04 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by 31 contributors from academy and industry from 12 countries (Austria, Bulgaria, China, Croatia, Germany, India, Iran, Singapore, South Korea, Taiwan, UK and USA) the book contains 14 chapters divided into three main parts: Networks (six chapters), Communications (seven chapters) and Security (one chapter). With this unique combination of information in each volume, the 'Advances in Networks, Security and Communications: Reviews' Book Series will be of value for scientists and engineers in industry and universities. Like the first volume of this book Series, the second volume also has been organized by topics of high nterest. In order to offer a fast and easy reading of the state of the art of each topic, every chapter in this book is independent and self-contained. This book ensures that our readers will stay at the cutting edge of the field and get the right and effective start point and road map for the further researches and developments.
Book Synopsis Analysis of Dielectric Resonator Antennas Excited by a Coaxial Probe Or Narrow Slot Aperture by : Gregory Paul Junker
Download or read book Analysis of Dielectric Resonator Antennas Excited by a Coaxial Probe Or Narrow Slot Aperture written by Gregory Paul Junker and published by . This book was released on 1994 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of a Hemispherical Dielectric Resonator Antenna (DRA) Excited by a Coaxial Probe Or a Narrow Slot by : Guanqun Zhou
Download or read book Analysis of a Hemispherical Dielectric Resonator Antenna (DRA) Excited by a Coaxial Probe Or a Narrow Slot written by Guanqun Zhou and published by . This book was released on 1993 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Waveguide and Metaguide Excitation of Dielectric Resonator Antenna Arrays Using Slots and Probes by : Islam A. Eshrah
Download or read book Waveguide and Metaguide Excitation of Dielectric Resonator Antenna Arrays Using Slots and Probes written by Islam A. Eshrah and published by . This book was released on 2005 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this work is to study the excitation of dielectric resonator antennas using rectangular waveguide slots and probes. Thus, the advantages of waveguides as feeding structures having low losses at high frequencies and the inherent wideband nature of dielectric resonator antennas are combined, which increases the system efficiency in the microwave range.
Book Synopsis Circularly Polarized Dielectric Resonator Antennas by : Raghvendra Kumar Chaudhary
Download or read book Circularly Polarized Dielectric Resonator Antennas written by Raghvendra Kumar Chaudhary and published by Artech House. This book was released on 2021-08-31 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Waveguide and Metaguide Excitation of Dielectric Resonator Antennas by : Islam Eshrah
Download or read book Waveguide and Metaguide Excitation of Dielectric Resonator Antennas written by Islam Eshrah and published by LAP Lambert Academic Publishing. This book was released on 2011-09 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique features of dielectric resonators and their potential advantages as radiating structures have encouraged researchers over the past two decades to devise various feeding mechanisms or structures suitable for dielectric resonator antennas. Among such structures are microstrip lines, coplanar waveguides, coaxial probes, image lines, and slotted cavities. Also, various geometries of dielectric resonator antennas were investigated, with the goal of introducing antenna geometries that have wide matching bandwidth, stable radiation patterns, and low cross-polarization levels. The aim of this work is to study the excitation of dielectric resonator antennas using rectangular waveguide slots and probes. Thus, the advantages of waveguides as feeding structures having low losses at high frequencies and the inherent wideband nature of dielectric resonator antennas are combined, which increases the system efficiency in the microwave range.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microstrip Patch Antennas by : Kai Fong Lee
Download or read book Microstrip Patch Antennas written by Kai Fong Lee and published by World Scientific. This book was released on 2011 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstrip patch antennas have become the favorite of antenna designers because of its versatility and advantages of planar profile, ease of fabrication, compatibility with integrated circuit technology, and conformability with a shaped surface. As there is currently an urgent need for graduate students and practicing engineers to gain an in-depth understanding of this subject, this book was written with this purpose in mind. The authors are IEEE Fellows who have made significant contributions to their fields of expertise. Professor K F Lee was the recipient of the 2009 John Kraus Antenna Award of the IEEE Antennas and Propagation Society.
Book Synopsis Radiation Pattern of Aperture Coupled Prolate Hemispheroidal Dielectric Resonator Antenna by : Yunpeng Song
Download or read book Radiation Pattern of Aperture Coupled Prolate Hemispheroidal Dielectric Resonator Antenna written by Yunpeng Song and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed analysis and study of a prolate hemispheroidal dielectric resonator antenna (DRA) excited by a rectangular slot aperture are developed. The method used is based on the dyadic Green's function technique in the spheroidal coordinates. In this work, the dyadic Green's functions pertaining to a magnetic-current source located in a dielectric spheroid is derived and expressed in a form convenient for numerical computations. The dyadic Green's functions are then employed to formulate the electromagnetic fields radiated by the DRA. The electromagnetic far field is expressed analytically in a compact form. The antenna radiation patterns and directivities are computed for different design parameters. The accuracy of the solution is attested by both comparing with HFSS simulation results and with published data for the corresponding hemispherical dielectric resonator antenna. Furthermore, efficient algorithms for calculating the prolate spheroidal wave functions are developed using the software package MATLAB. The algorithm developed here for calculating the prolate spheroidal function is compact, fast, and efficient, and compared well with other results in the literature.
Book Synopsis Analysis of Circularly and Linearly Polarized U-slot-excited Hemispherical Dielectric Resonator Antennas with a Backing Cavity by : Hang Yee Lam
Download or read book Analysis of Circularly and Linearly Polarized U-slot-excited Hemispherical Dielectric Resonator Antennas with a Backing Cavity written by Hang Yee Lam and published by . This book was released on 2005 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
