Abstract :
Power transmission by microwaves is today beyond a state of mere speculation. Two concurring factors are responsible : general interest in improving the state of the art of microwave power generation, and the evolution of new techniques1 with which to accomplish the desired improvement. Fig. 1 indicates the great growth rate of microwave power at wavelengths suitable for microwave power transmissions. The recent growth rate at both X and S bands has been such that the power has nearly doubled every year since 1958. The power level at S band, for example, has risen by a factor of 25 over the period of the last five years to a level of 400 kW of CW power.
