%0 Conference Proceedings
%T Effect of the direct detection effect on the HEB receiver sensitivity calibration
%A Cherednichenko, S.
%A Kollberg, E.
%A Angelov, I.
%A Drakinskiy, V.
%A Berg, T.
%A Merkel, H.
%S Proc. 16[super:th] Int. Symp. Space Terahertz Technol.
%D 2005
%C Göteborg, Sweden
%F Cherednichenko_etal2005
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=360), last updated on Fri, 21 May 2021 14:03:39 -0500
%X We analyze the scale of the HEB receiver sensitivity calibration error caused by the so called "direct detection effect". The effect comes from changing of the HEB parameters when whey face the calibration loads of different temperatures. We found that for HIFI Band 6 mixers (Herschel Space Observatory) the noise temperature error is of the order of 8% for 300K/77K loads (lab receiver) and 2.5% for 100K/10K loads (in HIFI). Using different approach we also predict that with an isolator between the mixer and the low noise amplifiers the error can be much smaller.
%K HEB
%K mixer
%K direct detection effect
%P 235-239