Microvawe Discharge Properties in Goubau Line

In this paper, analysis from experimental results showed some regularity in microwave discharge behavior and in signal propagation along transmission line. Microwave discharge in thin (conductor diameter three times less then oscillator wave length) single conductor transmission line represents erosion discharge of torch type. Material consumption and brightness temperature of conductor sputtering is determined by conductor material properties and oscillator power. Signal propagates in single conductor transmission line at conductor surface and its energy concentrates near the air-conductor surface. Different conductor bends do not lead to signal separation from conductor surface but they increase signal losses in transmission line skin layer. Conductor surface is heated during discharge process and is coated by a cinder that makes difficult to excite discharge again.