International comparison for RF power in the frequency range up to 18 GHz. - Jan P. M. de Vreede; Willemien Korfage; Patrik Persson; Luciano Brunetti; Valentin Lopez; Ivan Petras; Pierre Morard; Frantisek Hejsek; Andras Török; Jürgen Rühaak; John Ascroft; Erik DressLer; et al. (IEEE Trans. Instrum. Meas., 2001)