Wideband Radiation Pattern Simulation and Measurement of a Photodiode-Based Continuous-Wave THz Emitter

In this paper, the radiation characteristics of a PIN photodiode-based terahertz emitter are simulated using the finite-difference time-domain (FDTD) method. The simulation results are validated by measurements from 100 to 400 GHz. Azimuth and elevation radiation patterns are compared and investigated in terms of beamwidth and sidelobes.