ASM-HEMT Embedding Model for Accelerated Design of PAs

A nonlinear embedding model for a body-grounded version of the industry standard ASM-HEMT model is presented in this paper for accelerated power amplifier (PA) design. This embedding model is able to simulate any PA mode of operation at its intrinsic reference planes and predict the impedances and harmonic terminations required at the extrinsic reference planes to sustain that targeted mode for the modeled transistor. The ASM-HEMT embedding model is further extended to account for the transistor's manifold using six-port ABCD parameters, enabling more accurate design of MMIC PAs.