Abstract
It is proposed to set up a surface wave resonator consisting of a length of smooth bare wire acting as the guide and short-circuited at both ends by large flat conducting plates mounted at right angles with the guide. Energy would be supplied to the resonator at a frequency between 1000 and 40 000 Mc/s using either a coaxial or loop coupling and a similar device would be employed for the detector. From a knowledge of the guide wavelength, the frequency and the radial propagation coefficient of the wave in the air surrounding the guide, the corresponding T.E.M. wave velocity can be determined and thence c deduced for vacuum conditions. Attention is drawn to certain helpful features of the method but no attempt is made to assess its ultimate accuracy in comparison with other techniques whose value has been established for this purpose.