Download or read book Scattering from Arbitrarily Shaped Microstrip Patch Antennas written by David G. Shively and published by . This book was released on 1992 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scattering from Arbitrarily Shaped Microstrip Patch Antennas written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-17 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scattering properties of arbitrarily shaped microstrip patch antennas are examined. The electric field integral equation for a current element on a grounded dielectric slab is developed for a rectangular geometry based on Galerkin's technique with subdomain rooftop basis functions. A shape function is introduced that allows a rectangular grid approximation to the arbitrarily shaped patch. The incident field on the patch is expressed as a function of incidence angle theta(i), phi(i). The resulting system of equations is then solved for the unknown current modes on the patch, and the electromagnetic scattering is calculated for a given angle. Comparisons are made with other calculated results as well as with measurements. Shively, David G. and Deshpande, Manohar D. and Cockrell, Capers R. Langley Research Center DA PROJ. 1L1-61102-AH-45; RTOP 505-64-52-60...
Download or read book Radiation Scattering and Guidance of Electromagnetic Fields by Arbitrarily Shaped Structures Embedded in Layered Dielectric Media written by K. A. Michalski and published by . This book was released on 1991 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study has been completed for an aperture-coupled microstrip patch antennas with uniaxial substrates. In particular, by a rigorous spectral domain approach-a circular microstrip antenna excited by a fundamental microstrip line mode is analyzed through a rectangular aperture in a ground plane. A more efficient, but approximate, reciprocity theorem based method, has also been implemented. Finally, a mixed, spectral and space domain approach has been developed to analyze an arbitrarily shaped microstrip patch antenna coupled to a microstrip transmission line through an arbitrarily shaped aperture. The space domain method is used to model the arbitrarily shaped patch and aperture, and the semiinfinite transmission line is modeled in spectral domain. To corroborate the validity of the analysis, we have built a circular patch test antenna coupled to the transmission line through a rectangular aperture and measured its input impedance over a broad frequency range.
Download or read book Edge Field Analysis of Arbitrarily Shaped Microstrip Patch Antennas written by Thomas M. Martinson and published by . This book was released on 1988 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Scattering and Guidance of Electromagnetic Fields by Arbitrarily Shaped Structures Embedded in Layered Media written by and published by . This book was released on 1993 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integral equation approach based on the mixed-potential formulation is developed for the analysis of radiation, scattering and guidance of electromagnetic waves by arbitrarily shaped conducting objects in layered uniaxial media. This method is successfully applied to rigorously analyze coax- and waveguide-fed microstrip patch antennas of various shapes, as well as multiconductor transmission lines with conductors of various cross-section profiles, embedded in multilayered media. With the approach developed here, microstrip structures of various, possibly irregular shapes, embedded in multilayered isotropic or uniaxial substrates, may be investigated within one theoretical framework and using the same computer program.
Download or read book Modeling Antennas and Scatterers of Arbitrary Shape Embedded in Layered Dielectric Media written by Krzysztof A. Michalski and published by . This book was released on 1989 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: A general approach is developed for the rigorous analysis of radiation, scattering, and guidance of electromagnetic fields by conducting objects for arbitrary shape embedded in layered dielectric media. This approach is based on the mixed-potential form of the electric field integral equation, which is amenable to the existing, well-established numerical solution procedures, originally developed for objects in homogeneous space. Numerical results are presented for surfaces and wires that penetrate an interface between dissimilar media and for open microstrip transmission lines of finite thickness. Computed and measured data are also given for coax-fed rectangular and triangular microstrip patch antennas. (RRH).
Download or read book Rigorous Analysis of a Waveguide excited Microstrip Patch Antennas of Arbitrary Shape written by Min-Hua Ho and published by . This book was released on 1993 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moment Method Solutions for Radiation and Scattering from Arbitrarily Shaped Surfaces written by Pravit Tulyathan and published by . This book was released on 1981 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: General quadrilateral surface-patch, thin-wire, and wire/plate attachment modes are developed for the moment method solution of electromagnetic scattering and antenna problems. The basic theory along with the techniques for accurate and efficient evaluation of the impedance elements are described. The methods to automatically set up the surface-patch modes for a polygonal plate are given. Numerical results for various antennas and scatterers are compared with other theoretical results and measurements. Using techniques developed in this work, the microstrip antenna is analyzed and the numerical results are also presented.
Download or read book Analysis of Microstrip Patch Antennas with Nonzero Surface Resistance written by David G. Shively and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resonant Frequencies of Irregularly Shaped Microstrip Antennas Using Method of Moments written by Manohar D. Deshpande and published by . This book was released on 1993 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ELECTROMAGNETIC SCATTERING AND RADIATION FROM MICROSTRIP PATCH ANTENNAS ARRAYS RESIDING IN A CAITY written by J. M. JIN, J. L. VOLAKIS, A. ALEXANIAN and published by . This book was released on 1992 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstrip Antenna Design Handbook written by Ramesh Garg and published by Artech House. This book was released on 2001 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on Bahl and Bhartia's popular 1980 classic, Microstrip Antennas, this all new book provides the detail antenna engineers and designers need to design any type of microstrip antenna. After addressing essential microchip antenna theory, the authors highlight current design and engineering practices, emphasizing the most pressing issues in this area, including broadbanding, circular polarization, and active microstrip antennas in particular. Special design challenges, ranging from dual polarization, high bandwidth, and surface wave mitigation, to choosing the proper substrate, and shaping an antenna to achieve desired results are all covered.
Download or read book Analysis of Microstrip Patch Antennas with Nonzero Surface Resistance written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scattering properties of a microstrip patch antenna with nonzero surface impedance are examined. The electric field integral equation for a current element on a grounded dielectric slab is developed for a rectangular geometry by using Galerkin's technique with subdomain piecewise linear basis functions. The integral equation includes a resistive boundary condition on the surface of the patch. The incident field on the patch is expressed as a function of incidence angle. The resulting system of equations is then solved for the unknown current modes on the patch, and the radar cross section is calculated for a given scattering angle. Theoretical results in the form of radar cross section as a function of frequency are compared with results measured at the NASA Langley Research Center. Shively, David G. and Bailey, M. C. Langley Research Center NASA-TP-3362, CECOM-TR-93-E-2, L-17219, NAS 1.60:3362 RTOP 505-64-20-54...
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Time Domain Computational Electromagnetic Methods written by Qiang Ren and published by John Wiley & Sons. This book was released on 2022-11-15 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Time-Domain Computational Electromagnetic Methods Discover state-of-the-art time domain electromagnetic modeling and simulation algorithms Advances in Time-Domain Computational Electromagnetic Methods delivers a thorough exploration of recent developments in time domain computational methods for solving complex electromagnetic problems. The book discusses the main time domain computational electromagnetics techniques, including finite-difference time domain (FDTD), finite-element time domain (FETD), discontinuous Galerkin time domain (DGTD), time domain integral equation (TDIE), and other methods in electromagnetic, multiphysics modeling and simulation, and antenna designs. The book bridges the gap between academic research and real engineering applications by comprehensively surveying the full picture of current state-of-the-art time domain electromagnetic simulation techniques. Among other topics, it offers readers discussions of automatic load balancing schemes for DG-FETD/SETD methods and convolution quadrature time domain integral equation methods for electromagnetic scattering. Advances in Time-Domain Computational Electromagnetic Methods also includes: Introductions to cylindrical, spherical, and symplectic FDTD, as well as FDTD for metasurfaces with GSTC and FDTD for nonlinear metasurfaces Explorations of FETD for dispersive and nonlinear media and SETD-DDM for periodic/ quasi-periodic arrays Discussions of TDIE, including explicit marching-on-in-time solvers for second-kind time domain integral equations, TD-SIE DDM, and convolution quadrature time domain integral equation methods for electromagnetic scattering Treatments of deep learning, including time domain electromagnetic forward and inverse modeling using a differentiable programming platform Ideal for undergraduate and graduate students studying the design and development of various kinds of communication systems, as well as professionals working in these fields, Advances in Time-Domain Computational Electromagnetic Methods is also an invaluable resource for those taking advanced graduate courses in computational electromagnetic methods and simulation techniques.
Download or read book Mutual Coupling Between Antennas written by Trevor S. Bird and published by John Wiley & Sons. This book was released on 2021-06-28 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mutual Coupling Between Antennas A guide to mutual coupling between various types of antennas in arrays such as wires, apertures and microstrip patches or antennas co-sited on platforms Mutual Coupling Between Antennas explores the theoretical underpinnings of mutual coupling, offers an up-to-date description of the physical effects of mutual coupling for a variety of antennas, and contains techniques for analysing and assessing its effects. The book puts the topic in historical context, presents an integral equation approach, includes the current techniques, measurement methods, and discusses the most recent advances in the field. With contributions from noted experts on the topic, the book reviews practical aspects of mutual coupling and examines applications that clearly demonstrate where the performance is impacted both positively and negatively. Mutual Coupling Between Antennas contains information on how mutual coupling can be analysed with a wide range of methods from direct computer software using discrete methods, to integral equations and Greens function methods as well as approximate asymptotic methods. This important text: Provides a theoretical background for understanding mutual coupling between various types of antennas Describes the interaction that occurs between antennas, both planned and unplanned Explores a key aspect of arrays in any wireless, radar or sensing system operating at radio frequencies Offers a groundbreaking book on antenna mutual coupling Written for antenna engineers, technical specialists, researchers and students, Mutual Coupling Between Antennas is the first book to examine mutual coupling between various types of antennas including wires, horns, microstrip patches, MIMO antennas, co-sited antennas and arrays in planar or conformal configurations.
Download or read book Review of Radio Science written by W. Ross Stone and published by John Wiley & Sons. This book was released on 2002-08-12 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: A triennial summation of the state of the art in radio science This book is the fourth in the modern series of triennial reviews prepared by the International Union of Radio Science to further communication and understanding of the status and future of radio science, both for those working in the field, and for those who want to know what is of current importance in this area. The International Union of Radio Science, URSI (Union Radio-Scientifique Internationale), has divided the subject of "Radio Science" according to the ten topics of the Scientific Commissions that make up URSI. This volume consists of thirty-eight original, peer-reviewed papers. Each paper provides a critical, in-depth review of–and, in many cases, tutorial on–advances and research that have been of significant importance within the area of interest of the Commissions during the past three to four years. Among the topics covered are: Electromagnetic metrology Fields and waves Signals and systems Electronics and photonics Electromagnetic noise and interference Wave propagation and remote sensing Ionospheric radio and propagation Waves in plasmas Radio astronomy Electromagnetics in biology and medicine With an included CD-ROM of the full book text, allowing the user to do full-text searching of all the papers, the Review of Radio Science: 1999—2002 is a resource of vital importance to anyone working in, or with an interest in, radio science.
