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.
Download or read book Dielectric Resonator Antennas written by Biswajeet Mukherjee and published by Artech House. This book was released on 2021-11-30 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the understanding of the Cylindrical Dielectric Resonator Antennas (CDRA). The book introduces the fundamentals of DRA, CDRA, identifying the modes in a CDRA, excitation techniques and recent advancements pertaining to the research of the CDRAs. The latest trends in the field are discussed, including wide bandwidth of operation, high gain, modal stability, mode and impedance matching techniques, Circularly Polarized CDRAs, beam forming and MIMO applications for modern wireless systems. The experimental validation, testing, fabrication methods and machining to achieve cylindrical and its reformed shapes are also presented.
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.
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.
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.
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.
Download or read book 9th International Conference on Robotic Vision Signal Processing and Power Applications written by Haidi Ibrahim and published by Springer. This book was released on 2016-09-29 with total page 821 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceeding is a collection of research papers presented, at the 9th International Conference on Robotics, Vision, Signal Processing & Power Applications (ROVISP 2016), by researchers, scientists, engineers, academicians as well as industrial professionals from all around the globe to present their research results and development activities for oral or poster presentations. The topics of interest are as follows but are not limited to: • Robotics, Control, Mechatronics and Automation • Vision, Image, and Signal Processing • Artificial Intelligence and Computer Applications • Electronic Design and Applications • Telecommunication Systems and Applications • Power System and Industrial Applications • Engineering Education
Download or read book Dielectric Resonator Antennas written by Zhijiao Chen and published by John Wiley & Sons. This book was released on 2023-12-19 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric Resonator Antennas A detailed guide to dielectric-based techniques for antenna array design and construction Dielectric designs, which transmit electricity without conducting it, have in recent decades been increasingly incorporated into antenna arrays. The resulting Dielectric Resonator Antennas (DRAs) provide significant benefits over metal antennas, avoiding conduction loss and increasing efficiency. Dielectric elements can also be incorporated into metal antennas to improve performance. Dielectric Resonator Antennas provides an introduction to dielectric-based techniques for manufacturing antenna arrays. It supplies guidelines for identifying dielectric antenna designs (as opposed to metal ones), describes recent developments in dielectric antenna technology, and points toward potential areas of future growth and development. Readers will also find: Cutting-edge DRA applications in microwave and millimeter-wave communications Detailed discussion of array types including wideband, high-gain, high efficiency, and more Instructions for fabricating dielectric antenna arrays and assessing tolerance levels Dielectric Resonator Antennas is ideal for researchers and students in electrical engineering, as well as for engineers and others working in wireless communications.
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.
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.
Download or read book Active Rectangular Dielectric Resonator Antennas written by Mustiko O. M. Cahyo and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Modelling and Application Studies of Rectangular Dielectric Resonator Antennas written by Mohammad H. Neshati and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Millimeter Wave Optical Dielectric Integrated Guides and Circuits written by Shiban K. Koul and published by Wiley-Interscience. This book was released on 1997-04-04 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: This much-needed reference equips electrical engineers, designers, and researchers in the microwave industry with comprehensive, up-to-date information on the theoretical principles and practical applications of dielectric integrated guides and circuits.
Download or read book Dielectric Resonator Antenna written by Biswaranjan Barik and published by . This book was released on 2020-11-22 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this Book, a clear description of Design and analysis of Dielectric Resonator Antenna has given with Simulated Results which will help the researcher, scientist, and engineer to get a clear idea on this area. More concern has given to hemispherical and Rectangular Dielectric Resonator antenna.
Download or read book Circularly Polarized Rectangular Dielectric Resonator Antennas for Personal Communications written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Linearly and Circularly Polarised Rectangular Dielectric Resonator Antennas written by Shok Theng Low and published by . This book was released on 2006 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rectangular Dielectric Resonator Antenna written by M. W. McAllister and published by . This book was released on 1983 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
