A novel double V-shaped winding microstrip meander-line slow wave structure for millimeter-wave TWTs

We present a novel double V-shaped winding microstrip meander-line slow-wave structure (SWS) for traveling-wave tubes (TWTs) in this paper. The proposed structure evolves from a V-shaped winding microstrip meander-line. The radio-frequency characteristics of the above-mentioned structures are calculated. Numerical results from high frequency characteristics calculation are given and analyzed. It has been illustrated that, compared with the V-shaped winding microstrip meander-line, the novel structure proposed in this paper has higher interaction impedance and the same cold bandwidth over the working frequency band.