Theoretical design of an improved shunt-type AAN

Abstract

The conventional shunt-type asymmetric artificial network (AAN) has a critical drawback in that the measuring receiver reading is not proportional to the common-mode disturbance current flowing in the network cable of the equipment under test. To cope with this defect, the present paper theoretically proposes an improvement to the shunt-type AAN. First, circuit analysis is performed to express the AAN common-mode impedance and LCL in terms of the circuit parameters. Then, on the basis of this analysis, an improved shunt-type AAN that satisfies the fundamental requirements is designed and proposed. SPICE simulation demonstrates that the characteristics of the proposed AAN show extremely good agreement with the CISPR specifications.