re outdoor fm antennas in article beerb ccmail dayton saic com beerb ccmail dayton saic com bradlee beer writes i m interested in buying or building an omnidirectional antenna for the commercial fm band mhz the commonly sold ones are a folded dipole bent in an s shape and one with a pair of crossed dipoles i don t see either of these designs as exhibiting any gain and they probably aren t truely omnidirectional i m intrigued by the discone antenna does anyone have detailed information on how to design one for the fm band with ohm impedence is one commercially available are there other designs that have gain i already own a element fm yagi it works great but requires frequent rotation for those distant stations brad beer castle gate drive beavercreek oh brad for an antenna gain is synonymous with directionality the only way to get gain out of an antenna is to design in directionality the gain of an antenna is defined as the signal increase for a preferred direction over the signal obtained by an isotropic antenna bob sciamanda edinboro univ of pa
