RF HEMT SPICE model

Phil Hobbs did a model for the MiniCircuits SAV-551, which LT Spice treats as a mesfet on a schematic. I modified it a bit for the SAV-541. These models seem useful as regards DC and capacitance, but didn't include wirebond inductance. I can dig those models up if it would help. I think that Phil posted his 551 model here.

The RF boys avoid supplying Spice models. They are mostly stuck in the ancient S-parameter tradition... useless for biasing and wideband/nonlinear applications. Nobody specs Rds-on for RF transistors!

Mini-Circuits was emphatic that they would NEVER have Spice models. Dinosaurs.

Are you working classic RF or switching or something? We use them very off-label in time domain.

I work with RF amplifiers, filters etc., We do a LOT of Spice simulations, and so far the VBIC-BJT transistors have served us well. However, resently there has been a lot of buzz about GaN RF transistors, and we would like to try them out. I have Spice behavorial models of GaN RG transistors tht allow creating Yds vs. Vgs curves and so forth, but we are after the real large signa; models that will allow the simulayoon of amplifiers, etc., A good friend of mine, who works in the Dallas Telecom Alley area tells me that a number of GaN RF trasistor manufacturers(Cree, Triquint, Qorvo etc.,) have joined the CMC)Compact Modelling Consortium) and have teamed up with the CAD tool manufacturers as Microwave Office AWR and ADS to get a choke hold on this market. Consequently, the useless small signal S parameters are available, not the key large signal Spice models. That is why I asked here.

The EPC bga GaN fets are intended for wall-wart type stuff, but they are cheap and crazy fast so should be good for modest levels of RF power. We use them as fast pulse generator output stages. EPC has a Spice library and some LT Spice examples.