Dual-Band Magnetically Insulated Line Oscillator Realized With Ridged-Disk-Loaded Vanes

Abstract

In this article, a dual-band magnetically insulated line oscillator (DBMILO) incorporated with the ridged disk-loaded vanes rather than a conventional disk-loaded vane is examined to improve the interaction efficiency. Both, cold (beam absent) and hot (beam present) simulations have been carried out to examine the impact of ridged slow wave-structure (RSWS) on the performance of ridged DBMILO (RDBMILO). Cold simulations have been performed to investigate the impact of RSWS on the electromagnetic (EM) characteristics of the RDBMILO. The RF performance of the RDBMILO has been evaluated using the CST particle-in-cell (PIC) simulation. A collective peak RF power of 4.6 GW is obtained at 3.30 and 9.85 GHz frequencies. The peak power conversion efficiency of the RDBMILO was found to be <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sim$</tex-math> </inline-formula> 16.4%. Compared to the conventional DBMILO (CDBMILO), an enhancement of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sim$</tex-math> </inline-formula> 28% in both RF power and efficiency is detected with the RDBMILO.