A Stepwise Nicolson-Ross-Weir-Based Material Parameter Extraction Method Luukkonen, Olli ; Maslovski, Stanislav I. ; Tretyakov, Sergei A. Abstract Publication: IEEE Antennas and Wireless Propagation Letters Pub Date: 2011 DOI: 10.1109/LAWP.2011.2175897 Bibcode: 2011IAWPL..10.1295L