Comments on “Theory of Optimum Taper for Distortionless Pulse Transmission”

In the above paper, Chatterjee and De proposed a theory to design an optimum impedance taper for distortion-less Gaussian pulse transmission. In general, the impedance tapers are designed to maximize the power transmission over a wide frequency range between two lines of different impedances. However, it is impossible to match two different impedance lines around dc or zero frequency. As most of the energy of a Gaussian pulse is concentrated around zero frequency, it is impossible to send a Gaussian pulse through an impedance taper without any distortion. The design proposed by Chatterjee and De compromised the matching over a wide frequency range for distortion-less pulse transmission. In this comment paper, we have demonstrated the problem in detail.