TY - JOUR AU - Darren Williams AU - Bradley Alpert C2 - IEEE Transactions on Microwave Theory and Techniques DA - 2001-04-01 00:04:00 DO - https://doi.org/10.1109/22.915434 LA - en M1 - 49 PB - IEEE Transactions on Microwave Theory and Techniques PY - 2001 TI - Causality and Waveguide Circuit Theory UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=150829 ER -