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Multirange Trap Antennas
Multirange Trap Antennas: by Igor Grigorov, RK3ZK
Recently multirange trap antennas are widespread among radioamateurs. As matter of fact, the type of antennas was invented in the USA by H. K. Morgan, US patent # 2229856, 1938 (by reference [1]). Probably the first article about a trap antenna was published in reference [2] at 1940. So, what is the antenna and how is it work? Let's see it on the example of a ham vertical trap antenna in order to simplify a problem. Figure 1 shows us a schematic of such antenna.
PDF file, 520 KB (ANTENTOP-02-2004)
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Last Updated: December 6, 2007 22:17