Slow Sawtooth Voltage in a Stroboscopic Converter of a Georadar Receiver. Effect of Its Nonlinearity on Signal Distortions

For a stroboscopic converter, which is a receiver of an ultra-wideband pulsed georadar, the effect of the nonlinearity of the “slow” sawtooth voltage on the uniformity of the input signal sampling during its conversion has been considered. It has been shown that due to the exponential nonlinearity of the specified voltage characteristic of the equivalent RC circuit, the order of the sampling pulses of the stroboscopic receiver obeys the law that is based on the Lambert function. The distortions of the converted pulse signal arising due to the nonlinearity of the “slow” sawtooth voltage have been estimated.