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Showing posts with the label Improving The Super-J.

Simple Ham Radio Antennas--Improving the Super-J. Post #967.

Improving The Super J (http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=32360) Author:   John Higgins . Please click the title link or insert the title URL into your browser search box to read the full article. Comment: Fascinating article from antenna engineer John Higgins.  In this richly documented article, Higgins show us how to improve the already excellent performance of a VHF/UHF J-Pole antenna . According to Higgins, the collinear J-Pole antenna, commonly referred to as the "Super-J", improves the efficiency and performance of a regular J-Pole.  Higgins says the key to successful "Super-J" design is "the phasing stub with a simple coil."  This stub allows for only a small separation between the two half-wave radiators in this antenna. Mr. Higgins backs up his design with photos, SWR curves, impedance charts, radiation patterns , and actual on-air experience.  The "Super-J" antenna is easily made from locally available material