W Band Ridge Waveguide Loaded Twists And Turns And Abnormal Structure Research Of Traveling Wave Tube

Traveling Wave Tube(TWT) is widely used in radar, communications, electronic countermeasures, remote sensing and plasma diagnostics. Millimeter-wave TWT working in the frequency range between the microwave and infrared, has advantages of wide absolute-band, narrow wave, ability of all-weather working and large output power. Slow wave system is the important component for traveling wave tube to get interactions in note wave energy exchange, its quality directly affect the performance of the traveling wave tube. The folded waveguide(FW) has advantages of moderate bandwidth, large output power and easy processing. So it is a potential high frequency system working in the millimeter-waveband.In this dissertations, FW and its modified structures are simulated. Some important and valuable results are listed as the followings:1The dimensions of slow-wave structure (SWS) and interim waveguide structures are designed. The research methods of high frequency characteristics are introduced preparing for the study of novel FW.2Linear gradient ridge-loaded FW is developed and investigated. The high frequency characteristics of this structure is simulated and the beam-wave large signal interaction is simulated and investigated. The investigation reveals that:It has similar high frequency characteristics as normal ridge-loaded FW at35GHz. But its reflection is very low.3Ladder gradient ridge-loaded FW is developed and investigated. The high frequency characteristics of this structure is simulated. The beam-wave large signal interaction is simulated and investigated. The reflection of this structure which is simulated is lower than the reflection of normal ridge-loaded FW.4The experimental study of W band ridge-loaded FW TWT. Experimental methods and experimental principle is introduced. The data which is got from the experiment is analyzed. The experimental data agrees with the simulation results.