Analysis and Design of Class E Frequency Multiplier With Shunt Linear and Nonlinear Capacitances at Any Duty Cycle

The theoretical efficiency of the class E frequency multiplier with arbitrary output frequency can reach 100% by controlling the phase of the output current to satisfy the ZVS/ZVDS condition. It is necessary to select the appropriate value of the shunt capacitance of the frequency multiplier for satisfying these two conditions. In general, the shunt capacitance of the transistor consists of the linear external capacitance and the nonlinear parasitic capacitance. Therefore, the conventional design method of treating shunt capacitance as purely linear is not accurate enough. In this brief, a class E frequency multiplier with shunt linear and nonlinear capacitances at any duty cycle is analyzed and designed, and the design curve is given in detail. The simulation and experimental results show high agreement with the theoretical analysis result.