Effect of Dielectric Substrate and Substrate Selection at Microwave Frequencies

Designing of planar RF circuits needs an appropriate dielectric substrate to accommodate the required design in a specified area to exhibit required performance for intended application. Substrate plays an important role when it is employed at microwave and millimetre wave frequencies and good electrical as well as thermal stability is expected. The substrate parameter which may affect the overall RF circuit performance and those are very critical for selecting a substrate especially for space application is explained in this article.