PT Journal
AU Meledin, D
   Tong, CE
   Blundell, R
   Goltsman, G
TI Measurement of intermediate frequency bandwidth of hot electron bolometer mixers at terahertz frequency range
SO IEEE Microw. Wireless Compon. Lett.
JI IEEE Microw. Wireless Compon. Lett.
PY 2003
BP 493
EP 495
VL 13
IS 11
DI 10.1109/LMWC.2003.817133
DE waveguide NbN HEB mixers
AB We have developed a new experimental setup for measuring the IF bandwidth of superconducting hot electron bolometer mixers. In our measurement system we use a chopped hot filament as a broadband signal source, and can perform a high-speed IF scan with no loss of accuracy when compared to coherent methods. Using this technique we have measured the 3 dB IF bandwidth of hot electron bolometer mixers, designed for THz frequency operation, and made from 3-4 nm thick NbN film deposited on an MgO buffer layer over crystalline quartz.
ER