1-THz low-noise SIS mixer with a double-dipole antenna

Autor:	B. D. Jackson, Andrey M. Baryshev, A. V. Markov, Sergey V. Shitov, T. M. Klapwijk, N. N. Iosad, J. R. Gao
Rok vydání:	2002
Předmět:	Physics Noise temperature Physics and Astronomy (miscellaneous) business.industry Frequency band Superheterodyne receiver Reflector (antenna) Microstrip law.invention Radiation pattern law Optoelectronics Dipole antenna Antenna (radio) business
Zdroj:	Technical Physics. 47:1152-1157
ISSN:	1090-6525 1063-7842
DOI:	10.1134/1.1508081
Popis:	A quasi-optical mixer containing two Nb/Al/AlOx/Nb superconducting tunnel junctions integrated into a NbTiN/SiO2/Al microstrip line is studied experimentally in the 800–1000 GHz frequency range. The mixer is developed as an optional front end of the heterodyne receiver operating in frequency band 3 or 4 and incorporated into the HIFI module of the Herschel space-borne telescope. The double-dipole antenna of the mixer is made of NbTiN and Al films; the quarter-wavelength reflector, of a Nb film. The mixer is optimized for the IF band of 4–8 GHz. The double-sideband noise temperature TRX measured at 935 GHz is 250 K at a mixer temperature of 2 K and an IF of 1.5 GHz. Within 850–1000 GHz, TRX remains below 350 K. The antenna pattern is symmetrical with a sidelobe level below −16 dB.
Databáze:	OpenAIRE
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