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Multirange Trap Antennas




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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.


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Contents for AntenTop 02- 2004






Lightning Links to Open Book
Antenna Theory Helical Antennas Useful Pieces Simple Keys
Antenna Practice TV Antennas Propagation QRO HF Tube Amplifiers
136 kHz- Antennas Coaxial cables LDE QRO HF Transistor Amplifiers
HF- Antennas Two wire lines Interferences QRP
HF- RX Antennas Feeder's Toolkit Filters TVI/RFI QRP PA
50- MHz Antennas HF ATU Homebrew Receivers Radio and Ham History
VHF- Antennas ATU for the 6- meters Homebrew Transmitters Old Russian/USSR Radio Equipment
UHF -Antennas Antenna Parts Matching Circuit for P.A Amateurs Awards
EH- Antennas Antenna Towers QRP Transceivers Free Radio and Electronics e- Books
TV Channels and Frequencies Reception of Weather Stations Useful Data FM Radio Channels and Frequencies
MagLoop Antennas Home-Brew Technics in Antenna Tools PSU for Amateur Radio from Computer Free Programme and Utility





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Last Updated:

March 29, 2016 8:19