Numerical simulation of gyromagnetic nonlinear transmission line excitation by a bipolar voltage pulse of nanosecond duration
摘要
The article presents results of simulating excitation of oscillations by a nanosecond bipolar voltage pulse in nonlinear transmission lines (NLTLs) with saturated ferrite filling. The use of a bipolar pulse allows the energy efficiency of radiation sources based on the NLTLs to be increased by radiating both excited high-frequency oscillations and the bipolar pulse itself. The dynamics of bipolar pulse propagation along the NLTL operating in L‑, S‑, and C‑bands are considered. The influence of the bipolar pulse voltage and axial bias magnetic field on the spectral characteristics of the generated pulses is analyzed. Key physical limitations defining the length of the NLTL and the duration of the bipolar pulse for efficient device operation are identified.