Wave polarisation and its influence on the power available from a radio signal propagated through the ionosphere. Part 2

The fractions of power available from linearly polarised receiving aerials responding to the horizontally polarised or normally polarised components of downcoming single-hop skywaves are examined for a number of sample paths. These include long and short circuits in different directions at selected midpoints taken as representative of propagation in various regions of the world. Calculations are presented for a frequency of 3MHz, where it is assumed that there is no absorption by night, but that, by day, the extraordinary wave is heavily absorbed. The conditions under which the choice of aerial polarisation is important for minimum transmission loss are summarised.