Download or read book Electromagnetic Scattering and Radiation from Microstrip Patch Antennas and Spirals Residing in a Cavity written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new hybrid method is presented for the analysis of the scattering and radiation by conformal antennas and arrays comprised of circular or rectangular elements. In addition, calculations for cavity-backed spiral antennas are given. The method employs a finite element formulation within the cavity and the boundary integral (exact boundary condition) for terminating the mesh. By virtue of the finite element discretization, the method has no restrictions on the geometry and composition of the cavity or its termination. Furthermore, because of the convolutional nature of the boundary integral and the inherent sparseness of the finite element matrix, the storage requirement is kept very low at O(n). These unique features of the method have already been exploited in other scattering applications and have permitted the analysis of large-size structures with remarkable efficiency. In this report, we describe the method's formulation and implementation for circular and rectangular patch antennas in different superstrate and substrate configurations which may also include the presence of lumped loads and resistive sheets/cards. Also, various modelling approaches are investigated and implemented for characterizing a variety of feed structures to permit the computation of the input impedance and radiation pattern. Many computational examples for rectangular and circular patch configurations are presented which demonstrate the method's versatility, modeling capability and accuracy. Volakis, J. L. and Gong, J. and Alexanian, A. and Woo, A. Unspecified Center NCA2-653...

Download or read book Electromagnetic Scattering and Radiation from Microstrip Patch Antennas and Spirals Residing in a Cavity written by John L. Volakis and published by . This book was released on with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electromagnetic Scattering and Radiation from Microstrip Patch Antennas and Arrays Residing in a Cavity written by Jianming Jin and published by . This book was released on with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electromagnetic Scattering and Radiation from Microstrip Patch Antennas and Arrays Residing in a Cavity written by Jian-Ming Jin and published by . This book was released on 1992 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electromagnetic Scattering and Radiation from Microstrip Patch Antennas and Arrays Residing in a Cavity written by Jian-Ming Jin and John L. Volakis and published by . This book was released on 1990 with total page 38 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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scattering and Radiation from Microstrip Patch Antennas and Arrays Residing in a Cavity by Jian Ming Jin and John L Volakis written by Jianming Jin and published by . This book was released on with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book written by and published by . This book was released on 1992 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scattering and Radiation from Cylindrically Conformal Antennas written by Leo C. Kempel and published by . This book was released on 1994 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book radiation and scatering analysis of microstrip antennas via a hybrid finite element method written by jian-ming -jin and john l. volakis and published by . This book was released on 1991 with total page 49 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 Microwave Journal written by and published by . This book was released on 1993 with total page 1138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Finite Element Analysis of Conformal Antennas written by Tayfun Özdemir and published by . This book was released on 1998 with total page 256 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 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 Modeling of conformal antennas on doubly curved platforms and their interactions with aircraft platforms written by T. Ozdemir, J. gong, S. Legault, J. volakis, t. senior, j. berrie, r. kipp, h. wang and published by . This book was released on 1995 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Engineered Magnetic Materials for Antenna Applications written by Kevin Buell and published by . This book was released on 2005 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: