Modelling parasitic effects of plastic encapsulated microwave devices

This paper shows a new and accurate electrical modelling technique for low cost active plastic microwave encapsulated devices. The method employs analytically derived expressions, and is based on the analysis of measured S-parameters over an appropriate frequency range. The approach produces a good fit between measured and simulated S-parameters for plastic packaged devices, as demonstrated in the results for PHEMT devices up to 26.5GHz and for low-cost LNAs up to 6GHz.