Here is the teaching vedio of class E by keysight using CGH60030D hemt model on youtube.
Here is the datasheet of CGH60030D hemt. from cree, https://cms.wolfspeed.com/app/uploads/2020/12/CGH60030D.pdf
Recently, i started my university research on RF power amplifier, while I was trying to find some data for the GaN hemt applied on the class E power amplifier. I found that most of the GaN hemt used on the power amplifier is depletion mode with negative Vgs. I wonder what might cause this and the advantages of this design comparing to using enhancement mode GaN hemt, since firstly i need to do simulations on ads. So i am just very comfused about this. What will the results be if i use enhancement mode GaN hemt.
Here is the datasheet of CGH60030D hemt. from cree, https://cms.wolfspeed.com/app/uploads/2020/12/CGH60030D.pdf
Recently, i started my university research on RF power amplifier, while I was trying to find some data for the GaN hemt applied on the class E power amplifier. I found that most of the GaN hemt used on the power amplifier is depletion mode with negative Vgs. I wonder what might cause this and the advantages of this design comparing to using enhancement mode GaN hemt, since firstly i need to do simulations on ads. So i am just very comfused about this. What will the results be if i use enhancement mode GaN hemt.