Design of RF window for 42 GHz, 200kW gyrotron

Mukesh Kumar Alaria, Narugopal Nayek, S. Das, A.K. Sinha
2009 2009 IEEE International Vacuum Electronics Conference  
This paper describes the design of RF window for 42 GHz, 200 kW high power gyrotron. The simulation of RF window for 42 GHz gyrotron has been carried out using the Ansoft HFSS and CST microwave studio. In 42 GHz gyrotron double disc of diameter 85 mm and thickness 3.2 mm sapphire window and spacing (Coolant FC-75) of discs 2.5 mm has been used in the simulation. The return loss (S11) and insertion loss (S21) of the 42 GHz gyrotron window have been found -47.3 dB and -0.04 dB respectively. The
more » ... respectively. The return loss and insertion loss of the S-band single disc sapphire window have been found -27.3 dB and -0.07 dB respectively at cylindrical waveguide length 33 mm. The simulated result has been also validated through experimental results for S-band sapphire window.
doi:10.1109/ivelec.2009.5193498 fatcat:zzgxc7qorzftngh5rd6hsaetl4