Jarek Wosik1,2, Leiming Xie1,
Lian Xue3, Krzysztof Nesteruk4, Kurt H. Bockhorst3,
Ponnada A. Narayana3
1Electrical and Computer Engineering,
University of Houston, Houston, TX, United States; 2Texas Center
for Superconductivity, Houston, TX, United States; 3Diagnostic and
Interventional Imaging, University of Texas, Health Science Center-Houston
Medical School, Houston, TX, United States; 4Institute of Physics
Polish Academy of Sciences, Warsaw, Poland
In
order to address constrains regarding low loss decoupling techniques for
application in high-Q cryogenic arrays, we evaluated and compared SNR gain
from cooling to liquid nitrogen temperatures of 2x1 array at 7 Tesla for
three different decoupling methods. Beside standard overlapping approach we
have also used eight shape loop and capacitive decoupling techniques.
Calculations and experimental results showed the best performance (two fold SNR
gain) of the array with capacitive decoupling. The eight shape loop
decoupled array showed only a few percent lower SNR gain, whereas the
geometrical decoupling technique had reduced SNR gain by close to 20%.