W-band Broadband Frequency Multiplier

The W-band frequency range has garnered considerable attention among researchers, necessitating the development of efficient frequency doubling techniques. This paper introduces a novel W-band broadband frequency doubler employing a Schottky diode-based approach. A varactor diode, specifically the M4AE1310 model, serves as the crucial nonlinear element in the frequency doubler design. To streamline the model structure, the biased DC ground structure is eliminated. The frequency doubler comprises a waveguide-microstrip probe, a ground-matched direct, a CMRC (compact microstrip resonant cell) low-pass filter, and an input-output matching section. The modeling simulation is conducted using a combined ADS and HFSS. The simulation results demonstrate exceptional frequency doubling efficiency, yielding an output power of approximately 10 dBm when driven with a power of 20 dBm within the W-band frequency range.