ARRL Antenna Book 21st EdARRL Antenna Book 21st Ed, Krótkofalarstwo
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Since the first edition in September 1939, radio amateurs and professional engineers have turned to The ARRL Antenna Book as THE source of current antenna theory and a wealth of practical how-to construction projects. Use this book to discover even the most basic antenna designs— wire and loop antennas, verticals, and Yagis—and for advanced antenna theory and applications. Many of the antennas in this edition benefit directly from advances in sophisticated computer modeling. This 21st edition has been extensively revised to include information you can use to build highly optimized or specialized antennas. The book includes new content on Near Vertical Incidence Skywave (NVIS) techniques, phased arrays, S-parameters as used in modern vector network analyzers (VNA), Beverage receiving antennas, mobile “screwdriver” antennas, ionospheric area-coverage maps, and much…much more. Fully searchable CD-ROM included! Bundled with this book is a CD-ROM containing The ARRL Antenna Book in its entirety, using the popular Adobe ® Reader ® software for Microsoft ® Windows ® and Macintosh ® systems. View, search and print from the entire text, including images, photographs, drawings… everything! The CD-ROM contains additional utility programs, including: • YW —Yagi for Windows • TLW —Transmission Line for Windows • HFTA —HF Terrain Assessment for Windows • Range-Bearing — compute range/bearing or latitude/longitude • Arrayfeed1 — designing phased-array feed systems • EZNEC-ARRL — antenna modeling for Windows PLUS propagation forecast tables for more than 170 locations around the world for all portions of the solar cycle! CONTENTS Safety First Antenna Fundamentals The Effects of Ground Antenna Modeling and System Planning Loop Antennas Low-Frequency Antennas Multiband Antennas Multielement Arrays Broadband Antenna Matching Log Periodic Arrays HF Yagi Arrays Quad Arrays Long-Wire and Traveling-Wave Antennas Direction Finding Antennas Portable Antennas Mobile and Maritime Antennas Repeater Antenna Systems VHF and UHF Antenna Systems Antenna Systems for Space Communications Antenna Materials and Accessories Antenna Products Suppliers Antenna Supports Radio Wave Propagation Transmission Lines Coupling the Transmitter to the Line Coupling the Line to the Antenna Antenna and Transmission-Line Measurements Smith Chart Calculations Includes a comprehensive glossary and index Antenna Book Editor R. Dean Straw, N6BV Contributing Editors L. B. Cebik, W4RNL Dave Hallidy, K2DH Dick Jansson, WD4FAB Roy Lewallen, W7EL Rudy Severns, N6LF Frank Witt, AI1H Software Beta Testers Ahti Aintila, OH2RZ Alan Bloom, N1AL L. B. Cebik, W4RNL Loney Duncan, WØGZV Chuck Hutchinson, K8CH Steve London, N2IC Dan Maguire, AC6LA Steve Miller, N8SM (SK) Bob Neece, KØKR, Danny Richardson, K6MHE Rudy Severns, N6LF Jim Tabor, KU5S Bill Tippett, W4ZV Don Toman, K2KQ Pete Smith, N4ZR Scott Tuthill, K7ZO Frank Witt, AI1H. Production Michelle Bloom, WB1ENT Sue Fagan, KB1OKW—Cover Art Jodi Morin, KA1JPA David Pingree, N1NAS Kathy Ford The Covers: Tower photo at sunset (front and back): Tower and beam at the station of Francisco R.F. Aragao, PT2TD, in Brasilia, Brazil. Center image: Kurt Andress, K7NV, working on 40-meter Yagi at N6RO in Oakley, CA. Photo by Dean Straw, N6BV. Upper right image: UHF antenna. Photo credit: ShutterStock.com. Lower right image: Some of the members of the C5Z contest DXpedition near Banjul, The Gambia. Photo by Henryk Kotowski, SMØJHF. i Copyright © 2007 by The ARRL, Inc. Copyright secured under the Pan-American Convention International Copyright secured This work is publication No. 15 of the Radio Amateur’s Library, published by the ARRL. All rights reserved. No part of this work may be reproduced in any form except by written permission of the publisher. All rights of translation are reserved. Printed in USA Quedan reservados todos los derechos 21 st Edition First Printing ISBN: 0-87259-987-6 We strive to produce books without errors. Sometimes mistakes do occur, however. When we become aware of problems in our books (other than obvious typographical errors that should not cause our readers any problems) we post an Adobe Portable Document Format (PDF) file on ARRLWeb. If you think you have found an error, please check www.arrl.org/notes for corrections. If you don't find a correction there, please let us know, either using the Feedback Form in the back of this book or by sending an e-mail to pubsfdbk@arrl.org . ii upfront.pmd 2 3/20/2007, 2:58 PM Foreword We are pleased to offer the 21st edition of The ARRL Antenna Book . Since the first edition in September 1939, each new Antenna Book has provided more and better information about the fascinating subject of radio antennas. We’ve sold more than a million Antenna Books over the years to amateurs and professionals alike, making it one of the most successful books in our extensive lineup of publications. Fundamentals about antennas rarely change from edition to edition, but modern application of these fundamentals can result in more highly optimized or specialized antennas. For example, many of the antennas in this new edition benefit directly from ad- vances in sophisticated computer modeling. We usually update at least 20% of the material in a new edition, and this book is no exception. There have been major revisions in the following chapters: Chapter 2: Updated information the concept of “gain.” Chapter 6: Further insights into the importance of low elevation angles for the lower frequencies, plus a whole new section on NVIS (Near Vertical Incidence Skywave) operation. Chapter 8: Completely new section on feeding of phased arrays by W7EL. Chapter 13: Updates on Beverage receiving antennas. Chapter 14: New “tape-measure” portable Yagi for fox hunting. Chapter 16: New information on mobile “screwdriver” antennas. Chapter 23: Expanded section on ionospheric area-coverage maps. Chapter 27: New section on S-parameters, as used in Vector Network Analyzers (VNAs) We are fortunate to have the expertise of some well-known and highly talented authorities, who either wrote or reviewed a number of chapters for technical accuracy: Rudy Severns, N6LF, and Roy Lewallen, W7EL—low-frequency antennas. LB Cebik, W4RNL—Modeling antennas. Dick Jansson, WD4FAB—satellite antennas. Dave Hallidy, K2DH—EME arrays. Bob Hunsucker, AB7VP, and Carl Luetzelschwab, K9LA—HF propagation. In addition, some exceptional software writers have contributed programs and data for the Antenna Book . Roy Lewallen, the author of EZNEC , has created a special EZNEC ARRL program, just for the Antenna Book . EZNEC ARRL uses the multitude of specialized modeling files also included on the CD-ROM. These models were used in almost every chapter in the book. W7EL has also supplied Arrayfeed1.exe , a program to design feed systems for phased-arrays. Dr Peter Guth and the US Naval Academy have again graciously allowed ARRL to include the versatile MicroDEM mapping program on the CD-ROM. MicroDEM can easily and quickly generate customized terrain files for the HFTA terrain-assessment program, as well as map terrain all around the country using free US topographic data files from the Internet. Jim Tabor, NU5S, wrote GeoAlert-ARRL , a wonderful freeware program to track propagation trends and to keep tabs on the latest Internet propagation bulletins. Dean Straw, N6BV, editor of The ARRL Antenna Book has updated and upgraded his YW (Yagi for Windows), TLW (Transmis- sion Line for Windows) and HFTA (HF Terrain Assessment) programs from the 20th edition. A large number of statistical eleva- tion-angle files for QTHs all around the world are included as well. N6BV has also written a new Range-Bearing program that is included on the CD-ROM. Also included on the CD-ROM are DOS-based utility programs by several authors that analyze antenna tuners, design mobile antennas and LPDAs, and that scale Yagis for YW . Are you planning on going on a DXpedition to somewhere you’ve never been before? The CD-ROM now includes both Simpli- fied and Detailed propagation prediction tables for more than 150 QTHs all around the world. Even if you don’t journey to distant lands, these tables will give you plenty of insight on planning contesting or DXing strategies—They can also help you set up that Saturday afternoon schedule with your uncle Harry in Cleveland! You now have in one place the information you need to design your own complete antenna system scientifically—the eleva- tion angles to aim for from your part of the world and the effects of your own local terrain. As usual, in a publishing effort of this magnitude, errors creep into the process, despite our best efforts. We appreciate hearing from you, our readers, about errors or about suggestions on how future editions might be made even more useful to you. A form for mailing your comments is included at the back of the book, or you can e-mail us at: pubsfdbk@arrl.org . David Sumner, K1ZZ Executive Vice President Newington, Connecticut February 2007 iii upfront.pmd 3 3/20/2007, 2:58 PM [ Pobierz całość w formacie PDF ] |
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