Antenna Page 4

Antenna X For those interested in antenna experimentation, the magazine AntenneX is now an on-line monthly subscription publication. It appeals to both new and experienced antenna experimenters and builders.

David Robbins, K1TTT, has developed a most useful collection of technical notes that include important items on antenna and related antenna system elements. These notes include his own analyses as well as hard-to-find items drawn from internet sources. (The partial photo is just the tip of one tree in his antenna farm.) Among other items, you will find W3LPL's long Yagi designs (until Frank establishes his own web site).

David Jefferies, has placed on line a large number of very useful papers on fundamental aspects of antennas, ranging from Maxwell's Laws to Yagi-Uda antennas to transmission lines to radiation impedance to the basics of arrays. . .. This is just a sampling of the topics covered. The items appear aimed toward his E.E. students, but the papers are useful to all who wish another look at some of the basics ideas behind antennas.

Ian White, G3SEK, maintains an excellent "Technical Notebook" site. Information focuses on VHF/UHF and contains important antenna, filter, moonbounce, and circuitry data. The information on Yagi stacking and construction is especially interesting to me, but you may find his other notes to be just what you need. Ian writes the highly respected monthly RadCom "In Practice" column.

John Reynolds, G3PTO, provides another fine British antenna web site. Actually, antennas are only one portion (but an important portion) of John's collection of useful information for QRPers and other operators.

Kevin Schmidt, W9CF, has placed at his site a consider number of papers on tuners, baluns, networks, antennas, and related topics, along with some interesting and instructive applets for users to download. The material is advanced, with a strong mathematical element throughout.

Aaron Schmitz, KB0YKI, maintains several pages of good basic construction information on some useful antennas for VHF/FM work.

Phil Karras, KE3FL, maintains a diverse set of web pages which include some very useful, downloadable software on power output, SWR bandwidth, J-poles, and other subjects.

Mike Banz, AA3RL, has some interesting studies of dipoles, both vertical and and horizontal, at his site, along with the results of tests with a commercial multi-band vertical antenna. Also featured is a spreadsheet transmission line calculator that you can down load without cost.

Cecil Moore, W6RCA, has produceded an interesting page that focuses on techniques of matching parallel line fed antennas to station equipment, the G5RV antenna, and a variety of loop antennas.

John Tait, EI7BA gives excellent detail about the construction of his multi-band quad (exact number of bands keeps growing). Also included are details of the feed system and its rationale, along with many photos, drawings, and tables.

VK1BRH Ralph Holland, VK1BRH, shares my interest in antenna modeling. He specializes in low band short or compact vertical antennas, but his work covers a wide range of antenna simulation experiments.

Dan Warren Dan Warren, an Air Force antenna engineer, has developed (and continues to develop) one of the very best compact treatments of antenna fundamentals under the title "How to Become an Antenna Guru." Besides providing a technically sound introduction to an array of arrays (and basic antennas, too), Dan illustrates the long web entry with excellent color 3-D antenna patterns.

The G3YCC QRP site contains a wealth of information on a large number of topics of interest to QRP operator, including a variety of articles on antenna and related system items for both home and portable use. The site is related to (but not directly sponsored by) the GQRP club, a long-standing organization of QRP operators world-wide and publisher of SPRAT, a highly respected journal of QRP techjnical information and ideas. Only the antenna index page is linked here, but you can back up to the home page for the array of other QRP topics that George has provided.

The Nordic Shortwave Center has a collection of shortwave receiving antenna ideas and construction notes, including details on the T2FD broadband receiving antenna, hidden and invisible antenna notes, and a variety of other information useful to hams as well as short wave listeners.

A good site for learning antenna basics and designing basic antennas.

Ken Harker is developing new ways to present visualizations of antenna patterns. Although in the early development stages, this project bears watching and may one day find its way into commercial antenna modeling software.

Commercial Antenna Manufacturers and Vendors: A collection on known sources, offered because these pages often contain educational as well as commercial information.

Other Amateur Radio Links: A collection of links to organizations and linkage sites to help you find other good sources of information.