Miniaturized Metamaterial-based Sheet Beam Radiation Sources

In this paper, we investigate the transmission characteristics of metamaterial (MTM) -based slow-wave structure (SWS) with two waveguide couplers by using the frequency domain solver in CST 2016 Microwave Studio. The radiation source is also presented here based on the above structure to study the beam-wave interaction verified by the particle-in-cell (PIC) in CST 2016 Particle Studio. The simulation results show that the MTM-based SWS has a pass band near 3 GHz. Meanwhile, the radiation source has electronic efficiency of 26.7% and its peak output power is 61.6 kW at 2.83 GHz when the beam voltage and beam current are 38.5 kV and 6 A, respectively. The characteristic of miniaturization is shown by the fact that the transverse dimension of the MTM-based SWS is approximately 1/7 to 3/7 of the corresponding S band conventional structure.