Nonlinear Effect on Antennas




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Nonlinear effects on antennas: by Igor Grigorov, RK3ZK

TVI and RFI appeared suddenly when my transceiver worked on amateur ranges of 10-20 meters. Earlier the transceiver worked everywhere without TV and FM radio interferences. I did not do anything either to the transceiver or the antennas. For search of the cause of interferences the transceiver was switched off from the outside antenna and loaded to a dummy load. No interferences! The transceiver was switched on to the indoor magnetic loop. Again, no interferences! Interferences appeared when the transceiver was switched on to the outside antenna. An additional low-pass filter at transceiver output did not influence the level of arising interferences. So, located on a roof antenna was the source of interferences.

PDF file, 300 KB (ANTENTOP-01-2003, pp.: 23- 28)




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Last Updated:

February 26, 2018 22:28