Influence of Dispersion of Magnetic Permeability of Ferrite on Characteristics of UWB Pulse Receiving Antenna

Abstract

The properties of a ferrite antenna as an element of a radio system for receiving UWB (ultra-wide-band) electromagnetic pulses of the nanosecond duration range have been considered. The influence of the relaxation time of magnetic moments of the ferrite domains and the load resistance on the after-pulse oscillations of the signals received by the antenna has been studied. It is shown that the use of ferrite with an increased relaxation time of magnetic moments of domains as well as reducing the load resistance can prevent after-pulse oscillations in the received signal. The method of finite differences in the time domain was used. The dispersion properties of ferrite are described by the Debye condition of the 1st order.