Performance Improvement of Bifrequency Magnetically Insulated Line Oscillator Using Metamaterial

In this study, a metamaterial (MTM)-assisted bifrequency magnetically insulated line oscillator (BFMILO) has been proposed in order to enhance the device performance. Beam-free (cold) simulations have been carried out to investigate the effect of metamaterial, i.e., complimentary electric split ring resonator (CeSRR) disks on the dispersion curve, transmission characteristics, and the coupling impedance of the device. A CeSRR disk -loaded radio frequency (RF) interaction structure showed promising coupling impedance compared with the conventional one, improving overall device efficiency. The RF performance of the proposed device has been obtained by particle-in-cell (PIC) simulation. The simulation results demonstrate the performance of a high-power microwave (HPM) system operating at two different frequencies in the same band of frequencies, i.e., at 3.39 and 3.64 GHz. The collective RF peak power is ~7.2 GW with an efficiency of ~24.24% when an input dc potential of 550 kV and a beam current of 54 kA are employed.