Interference of ultra-wideband short electromagnetic pulses of high repetition frequency to GPS receiver

As the frequency spectrum of ultra-wideband(UWB) short electromagnetic pulses can cover the GPS frequency band, it can make threat to GPS receiver. The relationships between interference effects and parameters of UWB short electromagnetic pulses of high pulse repetition frequency(PRF) are studied from the aspects of theoretical analysis, numerical simulation and experimentation. The results show that if an integer multiple of PRF can fall into the GPS frequency band, the UWB short electromagnetic pulses will make strong interference effects on GPS receivers, and the pulse amplitude required to achieve the same interference effects is reducing in proportion to the PRF increasing, namely the product of pulse amplitude and PRF is constant；otherwise the interference effects will be unconspicuous.