A high-level VHDL-AMS model design methodology for analog RF LNA and mixer

VHDL-AMS supports the time and frequency domain modeling and noise modeling which make the RF circuit and system modeling in VHDL-AMS possible, while some restrictions do exist. For instance, the parameters of (LTF attribute of a quantity must be static is a difficulty to model a flexible bandwidth specification. We represent a methodology to design and optimize the analog RF circuit in VHDL-AMS to get a RF model with flexible specification input and high fidelity to noise and nonlinearity issues. Some suggestions on the extension of VHDL-AMS simulator to better support the RF circuit and system simulation are presented.