PT Journal AU Tong, CYE Blundell, R Paine, S Papa, DC Kawamura, J Stern, J LeDuc, HG TI Design and characterization of a 250-350 GHz fixed-tuned superconductor-insulator-insulator receiver SO IEEE Trans. Microw. Theory Techn. PY 1996 BP 1548 EP 1556 VL 44 IS 9 ER