While going through some of the past antenna geometries I came across log-periodic antennas. What type of antennas are they?
Hi - Log-periodic antennas can be any class of antennas having a structural geometry which has its electrical characteristics repeat periodically as the logarithm of the frequency. For example an antenna structure with a group of dipole antennas of varying sizes strung together and fed alternately through a common transmission line. See image shown here:
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