The source impedance of the power circuit in the x-ray machine is analyzed in the paperand based on the voltage drop generated by the impedance,the cross-sectional area of the cable is calculated.

In order to compare the filter characteristics of different hybrid shunt active power filter(HSAPF) and the influence of the source impedance to filter performance,four typical topology of the hybrid shunt active power filter(HSAPF) are selected in this paper,of which the operating principles are analyzed.

Current Mode Z-source Inverter-fed ASDs;

Based on transmission line theory and extraction method of active impedance of waveguide slot,a simplified computation method for the leaky-wall ridge waveguide filter is presented in this paper.