Investigation on four‐port mono‐capacitor circuit with high‐pass negative group delay behavior

Most of the recent studies on unfamiliar negative group delay (NGD) circuit were focused classes low-pass (LP) and bandpass (BP) topologies. So far, few research works are currently available in literature high-pass (HP) NGD class. This paper introduces an original HP-NGD theory four-port passive topology constituted by a single lumped capacitor. The S-matrix equivalent model innovative is established from admittance matrix. basic analytical frequency-dependent responses expressed. Then, GD derived function It was analytically found that mono-capacitor susceptible to behave as class function. An analysis explored addition expression synthesis design equation expected cut-off frequency which linked optimal value. validity verified with proof concept (POC) circuit. As expected, POC enables behavior show good correlation between confirmed simulation.