Radar and communications antenna-siting for low-angle radiation at high frequencies

It is shown that good low-angle radio transmission and reception at high frequencies can be obtained not only by using vertical polarization in the presence of an extensive horizontal highly conducting background (such as an ocean surface or an enormous ground screen), but also by using inland sites having a sloping background combined with distant level terrain (such as a fresh water surface). Numerical examples are used to show that the dimensions of such a sloping site are quite reasonable at the high end of the high-frequency band.