Ridge-Loaded staggered single-slot rectangular coupled-cavity structure for X-band traveling-wave tube

The analysis of the novel coupled-cavity traveling-wave tube(CC-TWT) operating at X-band is presented for the purpose of gaining higher power with a smaller size compared with the existing coupled cavity circuit. The electromagnetic characteristics, and the beamwave interaction based on the ridge-loaded staggered single-slot rectangular coupled-cavity slow-wave structure(SWS) are investigated. Compared with the existing staggered single-slot rectangular coupled cavity TWT, our designed TWT has the advantage in coupled impedance and electron efficiency, which makes it has the potential of miniaturization in CC-TWT. The calculation results reveal that it can produce saturated output power over 23 kilowatts from 8.6 to 9.5GHz when the cathode voltage are set from 25.9kV to 26.9kV and beam current is 5A, respectively. The corresponding saturated gain and electron efficiency can reach over 39dB and 17.4%.