Multipath interference in television transmission

This paper deals with television interference caused by reflections from buildings. Expressions are derived for the loci on which buildings must lie to give rise to interference having a given delay on the main presentation. The field strength of reflections from idealized buildings is calculated for various wavelengths of transmision and various distances between the transmitter and receiver. It is concluded that, although the interference increases with frequency, most of it could be eliminated by a simple directive antenna.