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A Low-Noise Double-Dipole Antenna SIS Mixer at 1 THz

Authors:
S. V. Shitov, B. D. Jackson, A. M. Baryshev, N. N. Iosad, J.-R. Gao, T. M. Klapwijk
Abstract:
A quasi-optical mixer employing a Nb/Al/AlOx/Nb twin-SIS junction with a NbTiN/SiO2/Al microstrip coupling circuit is tested at 800-1000 GHz. The mixer design is developed as an option for HIFI frequency bands 3 and 4. The double-dipole antenna is made from NbTiN/Al; a Nb film is used for the back reflector. The mixer design is optimized for the IF band of 4-8 GHz. The receiver noise temperature TRX = 250 K (DSB) is measured at 935 GHz for the bath temperature 2 K at IF=1.5 GHz; TRX remains below 350 K within the frequency range 850-1000 GHz. The double-dipole antenna beam pattern demonstrated good symmetry with sidelobes below –16 dB.
Categories:
SIS Mixers
Year:
2001
Session:
8
Full-text:
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Page Number(s):
363-372