R. Mittra, “Challenges in Antenna Designs and Some Novel Techniques for Meeting Them", Antennas and Propagation Conference, 2007, Loughborough, 2-3 April 2007 Page(s): 1-4

The publication is available to download from http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=4218444&isYear=2007