They differ only in the resolution and quality of the photographs. The first three chapters discuss the specification and design of large antenna systems, broken down by the frequency ranges they serve: low frequency, medium frequency, and high frequency. Next Steps: After completing this course, consider taking other courses in our or certificate program to continue learning. Under the laws then in effect, this renewal was not automatic - the renewal had to be registered by the copyright holder in a timely manner. I'd heard about it ever since shortly after I got my amateur-radio license. Prerequisites: Students are expected to have basic knowledge of Electromagnetics Theory, complex numbers, differential and intregal equations.
Antenna Theory and Design Encompassing the principles of electromagnetic radiators, this course will review the general properties of the radiation fields of given sources and design them as required in order to achieve a given radiation field pattern. If you think you can make an honest dollar by selling printed or electronic copies of this book, you're free to do as I did - find a printed copy, scan it, and clean it up. The Book Radio Antenna Engineering was published in 1952, and presents an excellent overview of the state of commercial antenna system engineering as practiced in the first half of the 20th century. See below for a discussion of the copyright issues involved. Radio Antenna Engineering is noteworthy for its collection of photographs of early and mid-20th-century radio transmission facilities and construction practices.
Nor does it apply to electronic versions created independently by someone else. We are providing the link to download the demo version of. I've actually created two different electronic versions. Ely Levine, Afeka College of Engineering, Tel Aviv, Israel. Small Antenna Design describes the theory behind effective small antenna design and give design techniques and examples for small antennas for different operating frequencies.
Contact: For more information about this course, please email. As such, it qualifies for its own independent copyright protection under United States law, and I am choosing to copyright it in order to control the terms of its use and distribution. Design techniques are given for the entire radio spectrum, from a very hundred kilohertz to the gigahertz range. Radio Antenna Engineering Radio Antenna Engineering I'm pleased to announce that Edmund A. The price you pay Lulu is for the printing and binding of the book and cover - I'm not collecting a royalty and they're waiving their commission. The copyright could be renewed in the last year of this initial term for a second term of 67 years.
The upshot of all of the above, is that I believe that the copyright on Radio Antenna Engineering expired at the end of its original 28-year term, and that the book passed into the public domain on December 31st, 1980. Then, the thought struck me - I have a flatbed scanner. Most people won't notice the difference in image quality. Unlike other antenna books which are heavily mathematical and theoretical, Douglas Miron keeps mathematics to the absolute minimum required to explain design techniques. Laport's textbook Radio Antenna Engineering is now available in electronic form. . If you do mis-use my version for commercial purposes, then may you have a conscience-twinging encounter with a Rettysnitch in the near future! Ground planes, essential for operation of many antenna designs, are extensively discussed.
Even though I already have a dozen antenna books in my personal library, I like this one as it adds another dimension. Low-visibility antennas have many attractive features, such as being low-profile, flexible, lightweight, small-volume, and low-cost. While each aspect must be separately developed, the final design must be an integration of the three, with a minimum of compromise and within reasonable economic limits. Under the laws of that era, this initial copyright was valid for a term of 28 years, and expired in 1980. Radio Antenna Engineering is certainly of significant historical interest, and may be of practical use as well. Upon checking with my city library, I found that although they didn't have a copy, there were several universities and colleges in the state which did, and that I could check out a copy for three weeks via a inter-library loan. The first pertains to radiant energy in space around an antenna system, as well as the current distributions that produce the radiation pattern.
Series Title: Responsibility: by Douglas B. As its name implies, it's not solely about electromagnetic or radio or antenna theory although these issues are certainly a part of what it talks about. As wireless devices and systems get both smaller and more ubiquitous, the demand for effective but small antennas is rapidly increasing. The second pertains to antenna circuitry and involves such matters as self- and mutual impedances, currents, potentials, insulation, and feeder systems that will yield the desired current distributions. Low-Visibility Antennas for Communication Systems provides explicit guidelines for the development of these antennas.
I figured I'd never be able to buy a copy of Radio Antenna Engineering. As Laport writes, There are three basic aspects of antenna engineering. And, in one of those marvelous cosmic moments of irony, it turned out to be unnecessary at least for me. Each chapter is well supported by drawings, charts, photographs, and an extensive bibliography of references. I could even give this electronic version to other people.
It is heavy on the math, but none of it is overly exotic and all of it is easily dealt with. I hope you do, as well. After I finished scanning the library's copy and returned it, and before I got started on the image processing, I won an eBay auction for a copy of the McGraw-Hill printed edition in mint condition. I've searched the Library of Congress online database of copyright registrations and actions for 1976 and onwards, and have found no evidence that McGraw-Hill, Laport, or anyone else ever renewed the copyright on this book. Three additional chapters discuss transmission lines, impedance matching techniques, and logarithmic potential theory. Third there is the structural engineering which has to do with all the mechanical details of supports, rigging, materials, strengths, weights, hardware, assembly, adjustability, stability, and maintenance. Based on all I've been able to find out, I believe that the copyright was not renewed.
Topics covered include: wave equation and its solution; antenna fundamentals; various antennas i. The E-mail message field is required. If I found the book to be interesting enough, I could scan the book and have an electronic record of the book that I could consult. As long as you don't use my version commercially, it's cool. Copyright and distribution issues Radio Antenna Engineering was published in 1952, and bears a copyright in the name of McGraw-Hill the publisher.