Terahertz multi-beam double vane Slow-Wave Structure with half-period-stagger

Abstract:

A multi-beam double vane Slow-Wave Structure(SWS) with half-period-stagger is presented，which is used to generate Terahertz(THz) continuous and high power wave. By analyzing the cold dispersion characteristics and axial field distributions of the novel SWS，it indicates that increasing the number of sheet beams will increase the current of beam with the same cold dispersion characteristics，and the SWS shows a high electrical efficiency at high frequencies. The process of the beam-wave interaction of structure is simulated with PIC code at 300 GHz. The simulated results show that the power gains of adjacent channels are both 20 dB under identical operating conditions, which means this novel type of SWS can operate in parallel with multiple beams，therefore the output power of device can be increased.