Download or read book On the Design of Rhombic Antennas written by Neil Ignatius Heenan and published by Hassell Street Press. This book was released on 2021-09-09 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book A Study of Possibilities for Improving Space Utilization and Performance of Rhombic Antennas written by Angel M. Martin-Caloto and published by . This book was released on 1959 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scaled model Measurements on a Nested tandem Array of Four Rhombic Antennas written by E. L. Kilpatrick and published by . This book was released on 1969 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antenna with high gains at low elevation angles are important to long distance HF communication. With application to an 11,070-km circuit between Washington, D.C. and Asmara, Ethiopia, in view, a design for an antenna consisting of four rhombic elements in a nested-tandem configuration was proposed. The overall length of the antenna was 442.8 m (1452.6 ft), the maximum height, 73.2 m (240 ft). Its nominal operating frequency range was from 6 to 19 MHz. Power gain was computed as a function of frequency, elevation angle, and azimuthal direction. Scaled-model measurements, using 200:1 scaling factor, were carried out to verify the computations. Calculations showed the maximum gain to be 26.5 dB at 14.5 MHz at an angle of about 4.5°. The computed performance deteriorated markedly above 18 MHz. The measurements confirmed the computations at the lower frequencies and showed the deterioration in the performance near the upper frequency end to begin at a lower frequency than computer.
Download or read book Rhombic antenna design written by and published by . This book was released on 1941 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimum Phasing of Nested Rhombic Antennas Connected in Parallel written by E. L. Kilpatrick and published by . This book was released on 1968 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rhombic Antenna Design Criteria written by and published by . This book was released on 1956 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Construction of a Rhombic Antenna for Tv written by Meng Leang Kan and published by . This book was released on 1976 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vertical Rhombic Antenna Design written by Robert Eugene Heller and published by . This book was released on 1946 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Chart for Rhombic Antenna Design written by W. G. Baker and published by . This book was released on 1943 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A chart has been prepared for the design of rhombic antennae to solve simply such problems as the following: the best proportions, the angle of maximum radiation at any wave length, and the wave length of maximum radiation at any angle of elevation. The results apply only in the vertical plane contaning the principal diagonal.
Download or read book The Design of Rhombic and V Type Antennas for Radiating Ultra short Waves written by Melvyn Harvey McCoy and published by . This book was released on 1937 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Television Antennas written by Donald A. Nelson and published by . This book was released on 1951 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimum Phasing of Nested Rhombic Antennas Connected in Parallel written by E. L. Kilpatrick and published by . This book was released on 1968 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radiation Characteristics of Two Phased Rhombic Antennas written by William C. Kidd and published by . This book was released on 1954 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Practical Guide to the Design of Rhombic Aerials written by J. N. Tyler and published by . This book was released on 1985 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Memorandum meets the need for practical advice on the design and assessment of the likely performance of the rhombic aerial. No new theoretical approach has been made but basic principles of the rhombic are explained and design charts of a new type are presented. These, compiled using two simple computer programs, offer a considerable time saving over design procedures used until now. Examples of aerials design used these charts are given together with polar diagrams of their theoretical performance. Keywords: Aerials; Radio antennas; Antenna radiation patterns; Great Britain.
Download or read book Interactions Between Nested Rhombic Antennas written by Peter P. Viezbicke and published by . This book was released on 1961 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consideration was given to the operation of antennas in close proximity to one another. Mutual coupling between 2 nested rhombics and the effect of one rhombic on the radiation pattern of the other were measured. For a ratio of antenna sizes of 2 to 1, the presence of either a coplanar or non-coplanar antenna had no influence on the gain and radiation pattern of the reference rhombic. To determine the maximum acceptable separation, measurements were extended to include rhombics almost equal in size and as close as practicable to each other. For wire separations of 0.5 lambda, the gain of the reference rhombic was reduced by 0.5 db. For 0.2 lambda separation the gain was reduced by 1 db, and for 0.04 lambda, by approximately 4 db. Except for very close spacings, the radiation patterns remained substantially unchanged. (Author).
Download or read book Experimental Investigation of Models of the closed rosette Array of Rhombic Antennas written by Herbert Preston Neff and published by . This book was released on 1956 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Logarithmically Periodic Rhombic Antenna written by Frank B Harris (Jr) and published by . This book was released on 1962 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The possibility of using a logarithmically periodic, concentric, rhombic antenna array for ionospheric sounding in the HF region is considered, both theoretically and experimentally. In particular, the feasibility of simultaneous excitation of n elements within a larger, m-element array is examined in detail. For a logarithmically periodic array, the group of any n neighboring elements forms a module whose properties are identical with those of any other similar module, except for a scale factor in frequency. A mathematical representation is developed which describes the behavior of such an n-element module independently of rhombic angle and height-to-leg length ratio. The important parameters of the calculation are the number and relative sizes of the elements within the module. It is shown, on the basis of the theory, that a module of three elements having a size ratio of 1.5 to 1 between successive elements should give a considerably lower side -lobe level over a larger frequency range than is typical of the single-element rhombic antenna. A design procedure is described for arrays intended for operation over large frequency ranges. This procedure is applied to a specific case, leading to a five-element, three-module array for operation over the range 4-36 Mc. The results of radiation pattern measurements on two different antenna models are presented. (Author).
