Elimination of beam squint in serially fed arrays with negative group delay circuits incorporating antenna elements

A novel design technique for a serially fed antenna array employing a negative group delay (NGD) circuit is reported. The NGD is generated using an antenna and a T-junction power divider. To the best of the authors' knowledge, this is the first demonstration of employing an antenna to generate NGD. The NGD circuit cancels out the positive group delay caused by the feed lines within the array. This results in beam squint elimination over the entire antenna operation bandwidth.