S.J. Erickson

Time-domain measurement of negative group delay in negative-refractive-index transmission-line metamaterials

M. Mojahedi, M. Mojahedi, G. Eleftheriades, 2004, IEEE Transactions on Microwave Theory and Techniques.

Time- and frequency-domain measurements for an active negative group delay circuit

M. Mojahedi, M. Mojahedi, S.J. Erickson, 2005, 2005 IEEE Antennas and Propagation Society International Symposium.