TY - JOUR AU - Leonardo Ranzani AU - Lafe Spietz AU - Jose Aumentado AU - Zoya Popovic C2 - IEEE Transactions on Applied Superconductivity DA - 2012-10-01 DO - https://doi.org/10.1109/TASC.2012.2202116 LA - en M1 - 22 PB - IEEE Transactions on Applied Superconductivity PY - 2012 TI - A 4:1 transmission-line impedance transformer for broadband superconducting circuits ER -