TY - CONF AU - Wittmann, Ronald AU - Alpert, Bradley AU - Francis, Michael C2 - Proc., ESTEC Antenna Workshop, Noordwijk, 1, NL DA - 1999-05-01 00:05:00 LA - en PB - Proc., ESTEC Antenna Workshop, Noordwijk, 1, NL PY - 1999 TI - Planar Near-Field Measurements Using Nonideal Measurement Points ER -