Abnormal filtering property based on the divergence of the impedance in ladder-shape network consisting of inductors and capacitors
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The total impedance of a ladder-shape network consisting of inductors and capacitors does not converge to a certain value when the steps of the network increased. In this paper, we analyze this effect in frequency domain. We find that in some band the impedance converge to a limit value while in other band it doesn't. Based on this property in frequency, we propose a filter that exhibits excellent performance both in amplitude and phase response. As a validation of our result, the simulation of this filter was carried out on the EDA software Multisim with respect to a practical circuit.