Title :
Microwave stabilization of HEB mixer by a microchip controller
Author :
Shurakov, Alexander ; Tong, Edward ; Blundell, Raymond ; Gol´tsman, Gregory
Author_Institution :
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Abstract :
The stability of a Hot Electron Bolometer (HEB) mixer can be improved by the use of microwave injection. In this article we report a refinement of this approach. We introduce a microchip controller to facilitate the implementation of the stabilization scheme, and demonstrate that the feedback loop effectively suppresses drifts in the HEB bias current, leading to an improvement in the receiver stability. The measured Allan time of the mixer´s IF output power is increased to > 10 s.
Keywords :
Frequency measurement; Mixers; Allan variance; HEB mixer THz receiver;
Conference_Titel :
Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International
Conference_Location :
Montreal, QC, Canada
Print_ISBN :
978-1-4673-1085-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2012.6259628
