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Calculations of the TE_(10)tapered waveguide,which will be used in the 4.6 GHzlower hybrid current drive(LHCD)launcher on the EAST,are presented.The calculations areperformed in two ways,namely by directly solving the classical coupling wave equations,and byusing the simulation code of the high frequency structure simulator(HFSS).According to thecalculations,the voltage standing wave ratio(VSWR)of the designed tapered waveguide can beless than 1.01 within a bandwidth of±100 MHz.
Calculations of the TE (10) tapered waveguide, which will be used in the 4.6 GHz lower hybrid current drive (LHCD) launcher on the EAST, are presented in these formulas are formed in two ways, namely by direct solving the classical coupling wave equations, and byusing the simulation code of the high frequency structure simulator (HFSS). Based on thecalculations, the voltage standing wave ratio (VSWR) of the designed tapered waveguide can be less than 1.01 within a bandwidth of ± 100 MHz.