Two-Port Vector Network Analyzer Measurements Up to 508 GHz. - Andy Fung; Lorene Samoska; Goutam Chattopadhyay; Todd Gaier; Pekka Kangaslahti; D. Pukala; C. Oleson; A. Denning; Yuenie Lau (IEEE Trans. Instrum. Meas., 2008)