Research On 330 GHz Multiplier Based On Planar Schottky Diode

Terahertz as the only resource in the spectrum has not been fully exploited,terahertz technology has important application value and research significance,and has become a hot field of scientific research in recent years.Terahertz signal source is widely used in communication,imaging,radar terahertz system etc.,which is obtained by frequency multiplier.Especially the solid-state multiplier technology based on planar Schottky diodes has become the main way to obtain terahertz signal source,which has the advantages of high integration,stable operation,appropriate cost and so on.As one of the atmospheric windows in terahertz band,the frequency near 330 GHz has potential application value in terahertz communication.In this paper,a 330 GHz balanced no-bias tripler based on planar Schottky diodes technique has been designed,using the method of co-simulation with HFSS and ADS software.The whole multiplier circuit is divided into the input and output probe transition,impedance matching suspended microstrip,low-pass filter and other circuit modules.Completing the simulation in the HFSS and exporting the S parameter file to the ADS software,and combined with the diode 3D electromagnetic model which is based on the physical structure and the intrinsic nonlinear SPICE model.Using the method of harmonic balance simulation and the iterative optimization between software to complete the design of frequency multiplier.The 330 GHz multiplier has been designed,processed,assembed and tested.The maximum output power is 149?W,and the minimum conversion loss is 22.9dB.The frequency multiplier can obtain better performance in the case of useing a larger drive signal source.A 170 GHz balanced frequency doubler with voltage bias has been designed to provide the front drive module for the 330 GHz two frequency multiplier.The simulation result shows that the maximum output power is 42 mW,and the minimum conversion loss is 6.8dB.The method and experience of the software co-design of the frequency multiplier circuit,and the modeling of the planar Schottky diode,which can provide reference for the further research and design.