a new type of antenna that uses the magnetic component of the wave instead of the electrical wave, but its not a small loop, its a vertical. yahoo groups has a group on it and google now brings up several sites, there was little on it a couple months ago but now alot of amateurs are building them for 160 meters with fantastic results in a very small package. ive not tried to build one yet but its an interesting antenna, with a narrow bandwidth from what ive read. some people say it will replace the marconi antenna types very quickly, time will tell