Patent ID: 6388512
Filing Date: 2002-05-14
Classification: G06F

Abstract:
A process for providing a High Efficiency Microwave Power Amplifier (HEMPA) which propagates a microwave frequency square wave, wherein said method utilizes a circuit simulation program for simulating Field Effect Transistors (FETs) at high DC-to-RF efficiencies, and comprises the steps of:(a) analyzing response data of linear elements of a plurality of selected FETs in a frequency domain; (b) analyzing response data of non-linear elements of the plurality of selected FETs in a time domain; (c) converting the non-linear response data from the time domain obtained in step (b) into the frequency domain by using a Discrete Fourier Transform (DFT) of time domain values; (d) performing a series of DC and S-parameter simulated measurements based on predefined data specific to each one of the selected FETs contained in the simulation program and from values obtained in steps (a) and (c); (e) extracting and isolating individual device parameters of the selected FETs by converting the S-parameters to one of admittance and impedance parameters to derive FET models for each of the selected FETs; (f) employing the FET models derived in step (e) in a simulated amplification circuit of the simulation program to provide a HEMPA circuit based on iterative simulations of the amplification circuit utilizing microwave topology at microwave frequencies, wherein the iterative simulations of the amplification circuit include analyzing output values of a plurality of cascaded stages of the selected FETs, and said cascaded stages including at least an input stage and an output stage of FETs, with each stage having FETs arranged in a push-pull configuration; and (g) receiving the final output of the HEMPA circuit from the simulation program after the iterative simulations provided in step (f) are a sufficient quantity to provide values of components for connection with the cascaded stages of FETs to provide said HEMPA circuit.