Download or read book Successful Wire Antennas written by Ian Poole and published by . This book was released on 2012-10-01 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Packed with the very latest wire antenna designs and developments from around the world. Covers a vast array of wire antenna designs including dipoles, doublets, verticals, loops and end-fed wires, as well a subjects such as impedance matching, TTUs, baluns, feeders, antenna masts and rigging, there is even an introductory chapter covering the antenna basics.--Cover.
Download or read book Practical Wire Antennas written by John D. Heys and published by . This book was released on 1989 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How to Build Effective Wire Antennas written by Edward Bearly and published by CreateSpace. This book was released on 2011-02-21 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: How to Build Effective Wire Antennas was written to fill the gap between building an antenna from a pattern which includes all the dimensions and those very dry fully technical books which tell you how to design an antenna from scratch with all the details but doesn't tell you how. There is sufficient technical detail, where required, for you to be able to design your own wire antenna for any frequency you like and have it work as designed. There is practical information about materials to use with a focus on keeping costs down. These are simple designs that anyone with basic tools can build and have working in a couple of hours.
Download or read book Building Successful HF Antennas written by Peter Dodd and published by . This book was released on 2008-10-01 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Explains what makes an effective HF antenna, how to build one and how to measure its performance. The book deals with real locations, such as small gardens, apartment blocks, lofts, etc. and how to obtain optimum performance within the constraints of your location"--Publisher's description.
Download or read book Optimisation of Wire Antennas written by F. M. Landstorfer and published by . This book was released on 1985 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: After discussing the phenomenon of wave detachment and radiation within the nearfield of wire antennas in terms of fieldlines, instantaneous and time-average energy flow and Poynting vector ellipses, a new equivalent circuit is introduced which helps to describe and optimize short radiators. Numerical methods for shaping wire antennas for maximum performance are given. Parameters to be optimized are, for example, directivity and effective length. Numerous results for single and split-wire antennas with and without reflector, offering directivities ranging from 7 to 16 db, are presented. The results are also discussed in terms of nearfield properties. Methods for optimizing a combination of performance parameters such as directivity, sidelobe level and impedance are then presented, and results given. Arrays of these optimally shaped elements are combined in new backfire, Yagi-uda and LP antennas which offer surprising properties.
Download or read book More Wire Antenna Classics written by C. L. Hutchinson and published by American Radio Relay League (ARRL). This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: So many wire antenna designs have proven to be first class performers! Here are two volumes devoted to wire antennas, from the simple to the complex. Includes articles on dipoles, loops, rhombics, wire beams and receive antennas--and some time-proven classics! An ideal book for Field Day planners or the next wire antenna project at your home station.
Download or read book Automated Design and Optimization of Wire Antennas Using Genetic Algorithms written by Derek Scott Linden and published by . This book was released on 1997 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Genetic Algorithm (GA) has been used in conjunction with the Numerical Electromagnetics Code, Version 2 (NEC2) to create and optimize atypical wire antenna designs with impressive characteristics. Antenna design parameters are encoded into an ordered series of numbers and/or symbols analogous to a biological chromosome. A cost function that quantifies how well a design meets the engineer's specifications is created. The GA uses these to generate and evaluate a population of designs. The most successful designs are then promoted and mixed through mating and mutation, while poor designs are removed. This process, difficult to trap in local minima, continues until convergence criteria are met, generally yielding excellent designs with no user intervention or initial guesses. Three antennas have been optimized: a monopole loaded with a modified folded dipole, the Yagi antenna, and the crooked-wire genetic antenna. Prior study of the loaded monopole had shown hemispherical coverage was possible. The GA found an asymmetric loaded monopole with an average variation in gain over the hemisphere of only 0.4dB, confirmed by measurement. GA-optimized Yagi antennas surpassed the gain of conventional Yagis by about 1dB, improvement also confirmed by measurement. The GA designed a Yagi with a beamwidth of 50 deg -60 deg, sidelobes nearly 25dB down, and a 14% bandwidth-specifications difficult to achieve using conventional techniques. The crooked-wire genetic antenna is several wires joined in series; locations and lengths are determined by the GA. Optimization for hemispherical coverage with right-hand circular polarization (RHCP) produced highly unusual shapes unrealizable using a conventional approach. RHCP hemispherical coverage was achieved with less than 4dB variation. Measurements verify the results.
Download or read book 73 Dipole and Long wire Antennas written by Edward M. Noll and published by . This book was released on 1969 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Wire Antennas written by John D. Heys and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CAD of Wire Antennas and Related Radiating Structures written by Branko D. Popović and published by Taylor & Francis Group. This book was released on 1991 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: A discourse on the computer-aided design of wire antennas, which provides numerous examples of the scope of CAD processes, including descriptions of the WireZeus-based CAD of antennas and related radiating structures, along with their matching networks.
Download or read book Portable Wire Antennas written by John W. Hill and published by Clear Springs Press. This book was released on 2015-04-15 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is not a book on antenna theory. It does provide clear easily understood explanations on the principles of antenna operation, transmission line considerations, impedance matching, baluns, tuners, and the pros and cons of different types and configurations of wire antennas. This book is written with the intention of enabling a new comer to amateur radio to understand the theory and practical considerations of this subject without getting lost in mathematics and complex theory. Portable, reliable HF communication is required for emergency management, expedition communications and recreational uses. This book is about selecting and constructing portable HF wire antennas that will provide maximum performance with low power, light weight and low bulk. All the information required to assemble antennas and antenna kits that can be deployed in multiple configurations is provided. Special attention is given to wire antennas deployed at low heights above ground, a situation confronted by operators on the move. Special attention is also given to NVIS (Near Vertical Incident Skywave) communications, which is also optimum with low antenna elevation. NVIS propagation enables communications in the 50-500 mile range regardless of terrain and independent of repeaters. With two or three low suspension points (8-20 ft.), one can deploy wire antennas that cover the 160-30 meter bands (those capable of NVIS propagation) with performance optimized for NVIS communication. With a single high suspension point that can be improvised from one or two tall trees, buildings or cliff faces and one of the antenna launch systems described here, one can deploy multiple antenna options that can be configured from the modular antenna kit. These include inverted V resonant or random wire dipoles, long wire antennas, sloper dipoles and inverted L antennas for efficient all-band regional use. It also covers terminated V beam and inverted half rhombic beam antennas optimized for 20-10 meters while being broad band (no tuner required), low noise gain equal to or greater than a high dipole. With two medium to high suspension points (15-80 ft. depending on the band), one can install half square wire antennas that produce high gain low angle radiation that is optimum for DX operation. Dropping one of the wire curtains converts the same antenna into a general coverage multi-band inverted L. With the versatility of the modular antenna components described here, one can quickly assemble, deploy and dis-assemble and roll up high performance wire antennas that are adaptable to nearly any operating environment and communications objective.
Download or read book Analysis and Synthesis of Wire antennas written by Branko D. Popović and published by John Wiley & Sons. This book was released on 1982 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antenna Toolkit written by Joseph Carr and published by Elsevier. This book was released on 2001-09-11 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Joe Carr has provided radio amateurs and short-wave listeners with the definitive design guide for sending and receiving radio signals with Antenna Toolkit 2nd edition.Together with the powerful suite of CD software, the reader will have a complete solution for constructing or using an antenna - bar the actual hardware! The software provides a simple Windows-based aid to carrying out the design calculations at the heart of successful antenna design. All the user needs to do is select the antenna type and set the frequency - a much more fun and less error prone method than using a conventional calculator to solve formulae. The new edition has been revised to include further cases of propagation, additional antennas and also two new chapters - Small Loop Antennas (a topic of considerable interest, which has been the subject of much recent debate in the amateur radio press); and Yagi Beam Antennas (widely used at HF and VHF). The CD software has also been updated.Joe Carr's expertise in the area of antenna design is legendary. Antenna designers, whether hobbyist or technician, can be assured they need look no further than Antenna Toolkit for the complete guide to understanding the practicalities of using and designing antennas today. A complete solution for antenna design in one package.Includes free CD-ROM with state of the art software for all design calculations.The definitive guide to antenna design for radio amateurs and short-wave listeners.
Download or read book Simple Low cost Wire Antennas for Radio Amateurs written by William Ittner Orr and published by Radio Publications, Incorporated. This book was released on 1972-01-01 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Wire Antennas 2 written by Radio Society of Great Britain and published by . This book was released on 2005-04-01 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ARRL s Even More Wire Antenna Classics written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long Wire Antennas written by Frank P. Hughes and published by . This book was released on 1994-01-01 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
