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Direction Finding Antennas

February 10th Fact-of-the-Day

A wide variety of radio direction finding antennas have been developed, including a loop, Adcock, Doppler, Quasi-Doppler, and various other multiple-element arrays. They all work rather well under ideal conditions where there is no significant noise, no significant interference from another station, a clear line-of-sight signal transmission path, and nothing for a signal of interest to reflect or reradiate from. Of course, ideal conditions rarely exist in real-world radio direction finding applications. Under typical real-world conditions there are big differences in performance between the various antenna types, primarily because some types are affected much less than others by signals other than a directly-arriving signal of interest. ©2005 Martek International All rights reserved.


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