Ultra-wideband short-pulse electric-field standard device with mirror monoconical structure

A standard device based on a monocone has been proposed for calibration of ultra-wideband short-pulse electromagnetic field sensors. The distribution of electromagnetic field in the monocone can be computed in analytical form by the Maxwell equations, the source and the dimensions of the monocone. The finite-difference time-domain method has been used to design and optimize the device structure. The standard device has been manufactured and tested. The test results indicate that the electric field waveforms in the monocone and the source are consistent with each other, with the voltage reflection coefficient at the feed point less than 4% and the amplitude of the electric field deviating from the analytical value less than 6%.