Download or read book A Flexible Dielectric Leaky wave Antenna at 160 GHz written by Martin Geiger and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Dielectric loaded Leaky Wave Antenna written by Jorgen Aasted and published by . This book was released on 1961 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and the measured performance are described of a flat, leaky-wave antenna in which the inductive, leaky surface is backed with a slab of dielectric. The analysis is based on a transverse resonance analysis which determines the physical dimensions of the antenna for a certain specified aperture distribution. An antenna was built to compare the theoretical behavior with the measured performance. Two ways of forming the dielectric to the antenna were tested. When the dielectric was molded in place the radiation pattern agreed very well with the theoretically predicted pattern, but high losses in the casting resin gave a lower gain for the antenna than anticipated. For a machined piece of dielectric, the radiation pattern was not as close to the predicted pattern as for the molded sample, but the gain was close to the predicted value. The antenna consists of a 28-by-18-inch through filled with a dielectric material over which a sheet of parallel wires is strung. At the design frequency, 4.75 gc, the antenna radiates a pencil beam 9.4 by 8.3 degrees wide at an angle of 54 degrees measured from the normal to the inductive surface. The beam can be scanned from approximately 75 degrees down to 12 degrees from the normal to the aperture by changing the frequency from 5.25 gc to 4.20 gc. (Author).

Download or read book A Dielectric Lens Antenna Fed by a Flexible Dielectric Waveguide at 160 GHz written by Martin Geiger and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Millimeter wave Frequency Scannable Dielectric Leaky wave Antenna written by John Yao-An Liao and published by . This book was released on 1995 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Trough Leaky wave Antenna written by Carlos Alberto Jaramillo and published by . This book was released on 2009 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dielectric Leaky wave Antennas for Millimeter wave Applications written by Scott Lee Ray and published by . This book was released on 1981 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dielectric and Dielectric Loaded Antennas written by Rajeswari Chatterjee and published by John Wiley & Sons. This book was released on 1985-11-07 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive survey of research on dielectric and dielectric-loaded antennas, providing a critical review of work carried out over the past thirty-five years. Covers a wide range of antenna shapes, types, and practical applications at microwave and millimetre wave frequencies.

Download or read book Antenna Handbook written by Y.T. Lo and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 2282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques based on the method of modal expansions, the Rayleigh-Stevenson expansion in inverse powers of the wavelength, and also the method of moments solution of integral equations are essentially restricted to the analysis of electromagnetic radiating structures which are small in terms of the wavelength. It therefore becomes necessary to employ approximations based on "high-frequency techniques" for performing an efficient analysis of electromagnetic radiating systems that are large in terms of the wavelength. One of the most versatile and useful high-frequency techniques is the geometrical theory of diffraction (GTD), which was developed around 1951 by J. B. Keller [1,2,3]. A class of diffracted rays are introduced systematically in the GTD via a generalization of the concepts of classical geometrical optics (GO). According to the GTD these diffracted rays exist in addition to the usual incident, reflected, and transmitted rays of GO. The diffracted rays in the GTD originate from certain "localized" regions on the surface of a radiating structure, such as at discontinuities in the geometrical and electrical properties of a surface, and at points of grazing incidence on a smooth convex surface as illustrated in Fig. 1. In particular, the diffracted rays can enter into the GO shadow as well as the lit regions. Consequently, the diffracted rays entirely account for the fields in the shadow region where the GO rays cannot exist.

Download or read book A Study of Dielectric Rod Leaky wave Antennas written by Roy Josef Paleta and published by . This book was released on 1981 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dielectric Antennas for Millimeter wave Applications written by Satoshi Kobayashi and published by . This book was released on 1980 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the results of an investigation of dielectric-based antennas for millimeter wavelengths. Two types of antennas have been studied, viz., Uniform and tapered dielectric rod antennas of rectangular cross-section which radiate in the endfire direction; and dielectric rods with discontinuities which perform as frequency scannable leaky-wave antennas. Experimental and theoretic design information and measured data on radiation pattern of both types of antennas are provided in the paper. (Author).

Download or read book Dielectric Coated Meandering Leaky wave Long Slot Antennas written by Frank Leon Whetten and published by . This book was released on 1993 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dielectric Waveguides and Leaky wave Antennas written by Ananjan Basu and published by . This book was released on 1998 with total page 220 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 1985 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lumped Element and Leaky Wave Antennas for Millimeter Waves written by A. A. Oliner and published by . This book was released on 1986 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some millimeter wave antennas can be scaled from their microwave frequency counterparts, but others cannot because of two main problems; the small wavelengths, which require small waveguide dimensions and pose fabrication difficulties, and higher metal loss. This contract was concerned with those antennas that cannot be scaled successfully, and it concentrated on novel leaky wave antennas. Two such waveguides were selected: the groove guide, and nonradiative dielectric (NRD) guide. Six different leaky wave antennas were analyzed on this program, with two treated in special detail. Three different leaky wave antennas were analyzed on this program, with two treated in special detail. Three different mechanisms for producing leakage were employed: asymmetry, foreshortening the structure's cross section, and using leaky higher modes. The different mechanisms also lead to different polarizations of the radiated fields. Accurate theoretical analyses were conducted for each of the antenna structures. Transverse equivalent networks were established, the elements of which were derived in closed form, so that the dispersion relations were also. Numerical values for the propagation characteristics were obtained as a function of various geometric parameters, to aid in the design of antennas based on these leaky structures. Special design considerations, including optimization procedures, were also developed when possible. In the case of the foreshortened top antenna based on NRD guide, detailed measurements were also taken, which showed very good agreement with our theory.

Download or read book A Study on Dielectric Waveguides and Leaky wave Dielectric Antennas at Millimeter Wave Frequencies written by Siey-mun Wong and published by . This book was released on 1996 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Analysis of Inset Dielectric Guide and Its Application in Leaky Wave Antennas written by Lizhuang Ma and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fixed frequency Beam steerable Leaky wave Antennas microform written by Karam M. (Karam Michel) Noujeim and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1998 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: