Experimental data on X band surface waveguides and launchers

The paper describes some investigations which have been carried out into the behaviour of dielectric-coated wires used as surface waveguides at Xband frequencies. The decay coefficient of the radial external field strength has been determined for several wires, and the corresponding attenuation coefficient has been calculated. The design of a suitable surface-wave launcher is also discussed, and the performance of such a launcher in the frequency band 8.6¿9.84Gc/s is described. All investigations were carried out in laboratory conditions.