Design issues for a solid-state power amplifier integrated with a planar antenna

This article presents design and analysis related issues for a solid-state power amplifier (SSPA) integrated with a planar antenna. It discusses the suitability of different planar antenna structures to minimize EM interaction between the radiator and the associated matching circuitry of the solid-state power amplifier. The design and simulation of an S SPA integrated with an antenna is presented, using harmonic balance analysis and an EM simulator simultaneously, to take care of the coupling between antenna and matching circuitry and to address out-of-band instability and nonlinear analysis of the power amplifier