A new configuration of a virtual cathode oscillator (VCO), i.e., a quasi-optical cavity VCO, is proposed for high-power microwave generation. The analysis and simulation are carried out to investigate the characterist...A new configuration of a virtual cathode oscillator (VCO), i.e., a quasi-optical cavity VCO, is proposed for high-power microwave generation. The analysis and simulation are carried out to investigate the characteristics of thisconfiguration. In the numerical simulation, the microwave output power of 2.93 GW is obtained with an electronbeam of 610 keV in electron energy and 26.7kA in the beam current. The beam-to-microwave power efficiency is18%. The frequency is 17.5 GHz, and the output microwave mode is TEM10.展开更多
The measurements and calculations (coupled mode equations) on the conversion of the transverse magnetic TM_(01) vircator (virtual cathode oscillator) mode at 4 GHz to the linearly polarized TE11 mode are presented by ...The measurements and calculations (coupled mode equations) on the conversion of the transverse magnetic TM_(01) vircator (virtual cathode oscillator) mode at 4 GHz to the linearly polarized TE11 mode are presented by means of mode converter systems using a circular waveguide with curvature. The mode converter is composed of the 38.78°bend with 39.07cm curvature and of the 50.78° inverse bend with 25.24cm curvature in the circular waveguide of 9cm internal diameter. The efficiency of conversion from TM_(01) to TE_(11) at 4 GHz exceeds 90%, and the overall etfficiency from TM_(01) to TE_(11) exceeds 90% in the calculated range from 3.72 to 4.8 GHz.展开更多
文摘A new configuration of a virtual cathode oscillator (VCO), i.e., a quasi-optical cavity VCO, is proposed for high-power microwave generation. The analysis and simulation are carried out to investigate the characteristics of thisconfiguration. In the numerical simulation, the microwave output power of 2.93 GW is obtained with an electronbeam of 610 keV in electron energy and 26.7kA in the beam current. The beam-to-microwave power efficiency is18%. The frequency is 17.5 GHz, and the output microwave mode is TEM10.
文摘The measurements and calculations (coupled mode equations) on the conversion of the transverse magnetic TM_(01) vircator (virtual cathode oscillator) mode at 4 GHz to the linearly polarized TE11 mode are presented by means of mode converter systems using a circular waveguide with curvature. The mode converter is composed of the 38.78°bend with 39.07cm curvature and of the 50.78° inverse bend with 25.24cm curvature in the circular waveguide of 9cm internal diameter. The efficiency of conversion from TM_(01) to TE_(11) at 4 GHz exceeds 90%, and the overall etfficiency from TM_(01) to TE_(11) exceeds 90% in the calculated range from 3.72 to 4.8 GHz.
