High-Power Frequency Multiplier Using MIS Varactors (Short Papers)

The experiment described demonstrates the applicability of MIS varactors in microwave power circuits. A frequency doubler with 55-percent overall efficiency and pulsed output power of 5.5 W at 5.4 GHz with a duty cycle of 50 percent has been built by using two MIS varactors in parallel. The multiplier has a coaxial low-pass filter at the input and a waveguide output, allowing a 3-dB bandwidth of 8 percent.