TY - GEN AU - Davis, Ben AU - Grosvenor, Chriss AU - Johnk, Robert AU - Novotny, David AU - Baker-Jarvis, James AU - Janezic, Michael C2 - Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD DA - 2007-01-01 LA - en M1 - 112 PB - Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD PY - 2007 TI - Complex permittivity measurements of planar building materials using a UWB free-field antenna measurement system ER -