Comparative studies of various types of transmission lines in the frequency range 70 GHz 1 THz for ITER ECE diagnosticRavinder Kumar, S. Danani, H.K.B. Pandya, P. Vaghashiya, V.S. Udintsev, G. Taylor, M.E. Austin and Vinay KumarEPJ Web Conf., 203 (2019) 04009DOI: https://doi.org/10.1051/epjconf/201920304009