The Influence of Temperature on Microstrip Transmission Line Characteristics

A mathematical temperature model of propagation characteristics is presented and its study is performed on the example of a microstrip transmission line. It was found that the maximum change of line characteristics with the separate influence of a temperature change from minus 50°C to 150°C on each of the cross-section parameters of the line does not exceed 1%, and with a simultaneous influence on all parameters 10.76%. It was revealed that the maximum influence on the change of line characteristics is exerted by the change of the substrate relative dielectric permittivity, at which the maximum change in per-unit-length parameters is up to 10%.