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Theory and design of microwave fet frequency triplers

Bozkurt, İsmail
Microwave frequency multipliers are very useful and advantageous components in microwave systems, especially, where the generation of high frequency sinusoidal signals is very difficult because of degrading performance of the solid state oscillators with increasing frequency. These components are frequently employed in diverse applications such as commercial wireless communication systems, microwave transmitters and receivers, and military systems. In the following work the basic principles of microwave FET frequency multipliers, specifically concentrated on triplers, are studied presenting theoretical concept and utilizing computerized simulation of piecewise linear FET (PLF) model. The use of PLF model which neglects nonlinear reactances and relies on resistive nonlinearities allows for the theoretical concept and, consequently, the multiplication mechanism in a frequency multiplier to be clearly and easily identified. At the end of this study, after presenting basic considerations on FET frequency multipliers a practical microwave frequency tripler design is presented.