Radio Technique and Apparatus for the Study of Centimetre-wave Propagation

The paper describes the apparatus and associated techniques developed early in the war for the study of the propagation of centimetre-wave energy through the troposphere. The point-to-point method is employed in which a measured power is transmitted along the path under observation and the signal received at a distant point is recorded by a receiver which is calibrated with a signal generator. The transmitting, receiving, monitoring and calibrating apparatus for the three wavelengths used (9, 6 and 3 cm) is described in some detail, and an outline is given of the method employed to record the signal strength continuously. A short account is given of operating experience, the setting up and maintenance of the equipment and the editing of records. Finally an estimate is made of the probable accuracy of measurement and this is compared with observed results.