Antenna Article Site
Note: The W4RNL antenna article website, in the link above, generates a pop-up ad for the free web hosting service it uses, which is www.000webhost.com. The web host is free, but uses pop-ups to advertise itself. A pop-up will occur each time a new page is entered. To deal with the pop-up, just close the pop-up by clicking the "x" in the pop-up ad. Also, a pop-up blocker program may help your browser block the pop-up. Another alternative is to not visit the W4RNL site. However, the articles are excellent. You will be missing out on some great antenna information if you do not visit the site.