Optimisation of resistive sensor for ridge waveguide

Finite-difference time-domain simulations of electromagnetic field distribution in double ridge or H-type waveguide segment with a semiconductor structure were performed. The structure serves as a resistive sensor for high power microwave pulse measurement within the working frequency range of the waveguide. As a result of the investigation, conditions for the optimal sensor with the "flattest" frequency response were determined. The best calculated sensitivity variation for the sensor was roughly ±21% for WRD-250 waveguide and ±6% – for WRD-750 waveguide.