Help for Mosfet for class A amplifier at 3 GHz in ADS

Hello
I want to design a class A RF amplifier at 3 GHZ by ADS , but i can not decide to choose a MOSFET for this design. Pls help.

Thanks

If you intend to build a A-Class MOSFet amplifier with discrete transistor, please be adivsed that you can not find discrete MOS transistors-to my knowledge- for that frequency.
Instead, you should use pHEMT/GaAs/Biploar discrete transistors.Look at www.avagotech.com

The LDMOS transistors BLS6G2731-6G or BLS6G2735L-30 from NXP are specified for Class-AB pulsed RF operation in 2.7GHz - 3.1GHz range.
Most probably if you back-off the output power (and losing efficiency) you can use the transistors for a Class-A PA design.

http://www.nxp.com/documents/data_sh...S6G2731-6G.pdf
http://www.nxp.com/documents/data_sh...G2735LS-30.pdf

Finding free ADS models for those transistors would be a problem. Check Modelithics site.

Thanks Friend
If it is possible for 1 GHz in class A , Pls guide.

It depends from the gain and P1. Typically PHEMTs for instance as Excelice EPA 018-70 to EPA080-70.
http://www.alldatasheet.com/datashee...PA018A-70.html