> RDF is the key point to improve signal noise, not gain. Vertical or low dipole has very or none directivity, so low RDF or directivity does not improve signal noise.
In general, this is the case, but it is not always true. Consider that you can have an antenna with a high RDF number, but at the same time has a pattern where rear lobe positions favor the optimum elevation angles for arriving propagated atmospheric noise. If you look at some of the various Low Band receive antennas and vary their parameters around, you can end up with high RDF number with significant lobes off the back that are only 10 dB down from the main signal. The pattern is always a compromise and a good RDF number is a great tool to have in the box, but it is not the only consideration. Jim, KR9U _______________________________________________ Topband reflector - [email protected]
