A Circuit Principle and Simulation Test for Negative Group Delay

Abstract Group velocity superluminal phenomenon, also known as negative group delay or refers to a of envelope signal at the output end medium before input, in time axis, is leave appears entering medium, but this does not violate causality. Based on waveguide theory delay, paper uses transfer function, amplitude response and phase shift electronic circuit control velocity, introduces three first-order bandpass amplifier RC circuits low frequency band, which realize positive filtering functions respectively. Finally, phenomenon preliminarily realized by using simulation software, lays foundation for subsequent research. As an that can carry transmit information, study great significance improvement transmission efficiency.