Post #4065069

@gilesgoat@toot.wales @RobeeShepherd@mastodon.art Not quite. There are three main distinguishing characteristics: • The elements change length significantly - a Yagi-Uda’s elements are all almost the same length • The elements are all connected - in a Yagi-Uda, the driven elements are connected to the feed, but the reflector and director elements are electrically isolated • The alternating directions of the elements - Yagi-Uda antennas are symmetrical across the antenna’s axis Log-periodic antennas change element length dramatically over the length of the antenna, the elements are connected into two groups, and the groups alternate with each element (core-up-shield-down, core-down-shield-up).