Resistive sensor for high power millimetre wave pulse measurement

A high power millimetre wave pulse sensor for 78-118 GHz frequency range has been developed. A finite difference time domain method was applied to optimise the sensor´s frequency response. Two groups of sensors were manufactured and tested experimentally. A voltage standing wave ratio and dependence of the output signal on pulsed power have been measured. The sensor has been tested up to 2 kW pulse power. Dependences of sensitivity on frequency were measured and reasonable agreement between the measured and calculated values has been obtained, once the finite thickness of upper metal contacts of sensing elements and the air gap between them is taken into account.