Three dimensional monolithic integrated miniaturized terahertz frequency doubler based on Z-direction input and XY plane four channel output

The traditional frequency doubler structure is single input and single output. Its input and output structure is completely distributed on the XY plane. The structure is not compact, which makes the device size larger. According to the development trend of terahertz multi-channel communication system in the future, a three dimensional monolithic integrated miniaturized terahertz frequency doubler based on Z-direction input and XY plane four output is designed in this paper.The electromagnetic wave transmission direction is perpendicular to the substrate. Only two power division structures are used to realize four-way power output. Great innovation is realized in the structure, which makes the frequency multiplier more compact and ensures the consistency of phase and amplitude output from four channels. Finally, in the simulation, under the input of about 500mW, each channel has an output of more than 50mW in the bandwidth of 166GHz ~ 183GHz, with an efficiency of more than 40% and up to 42%.