Waveguide DC breaks for TE01 and HE11 microwave transmission lines D. I. Sobolev, A. P. Gashturi, G. G. Denisov, G. I. Kalynova and D. A. Lukovnikov EPJ Web Conf., 187 (2018) 01026 Published online: 03 September 2018 DOI: 10.1051/epjconf/201818701026