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We propose new support rod material in helix TWTs to improve the heat dissipation performance of the tubes, which is the cubic Boron Nitride (CBN) crystal with the second highest thermal conductivity and relatively low dielectric constant. The high frequency characteristics and the beam-wave interaction of helix slow wave structure with CBN and BeO support rods are simulated and analyzed, respectively...
In order to obtain the temperature distribution along inner helix of working TWTs, fiber Bragg grating array (FBGA) can be considered to be used in testing the temperature. Two testing methods based on FBGA embedded on/in support rod helix structure are proposed. The influence of the FBGA on beam-wave interaction is analyzed through CST. The results show that the structure with FBGA embedded in support...
S-type microstrip meander-line slow wave structure was designed and simulated. The effects of different structural parameters on the new structure were analyzed. The simulation results show that this microstrip meander-line slow wave structure has a similar dispersion characteristic with the traditional structure, and the center frequency expands to the higher frequency. The transmission loss and...
A high space resolution platform has been built to measure the cold test parameters of Electromagnetic Band Gap (EBG) waveguide. The space resolution of this platform can be reached to 4μm and controlled by FPGA and computer through LABVIEW. An EBG waveguide is fabricated for measurement. The mode field of cross section and propagate constants have been simulated by our coding and tested by this platform...
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