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Measurement of intermediate frequency bandwidth of hot electron bolometer mixers at terahertz frequency range

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4 Author(s)
D. Meledin ; Harvard-Smithsonian Center for Astrophys., Cambridge, MA, USA ; C. -Y. E. Tong ; R. Blundell ; G. Goltsman

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.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:13 ,  Issue: 11 )