%0 Journal Article %J IEEE Transactions on Antennas and Propagation %D 2014 %T Transmission- Line Model and Propagation in a Negative-Index, Parallel-Plate Metamaterial to Boost Electron-Beam Interaction %A N. A. Estep %A A. N. Askarpour %A S. Trendafilov %A Shvets, G. %A A. Alu %B IEEE Transactions on Antennas and Propagation %V 62 %G eng %U http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=6758351 %N 3212