Reduction Technique of Differential Propagation Delay with Negative Group Delay Function

This paper deals with an innovative technique of propagation delay reduction. The technique is based on the use of bandpass negative group delay (NGD) function. The principle of the propagation delay reduction is introduced by considering a simple scenario of Tx multi-wireless sensors communicating with a single Rx sensor. With the consideration of bandpass NGD function, it is shown that the differential between the propagation delay can be reduced considerably. The feasibility of the technique is confirmed with group delay diagram by considering microstrip NGD prototype measured S-parameters.