%0 Journal Article
%T A 1.3-THz balanced waveguide HEB mixer for the APEX telescope
%A Meledin, Denis
%A Pavolotsky, Alexey
%A Desmaris, Vincent
%A Lapkin, Igor
%A Risacher, Christophe
%A Perez, Victor
%A Henke, Douglas
%A Nystrom, Olle
%A Sundin, Erik
%A Dochev, Dimitar
%A Pantaleev, Miroslav
%A Fredrixon, Mathias
%A Strandberg, Magnus
%A Voronov, Boris
%A Goltsman, Gregory
%A Belitsky, Victor
%J IEEE Trans. Microw. Theory Techn.
%D 2009
%V 57
%N 1
%@ 0018-9480
%F Meledin_etal2009
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=554), last updated on Sun, 22 May 2016 16:12:17 -0500
%X In this paper, we report about the development, fabrication, and characterization of a balanced waveguide hot electron bolometer (HEB) receiver for the Atacama Pathfinder EXperiment telescope covering the frequency band of 1.25–1.39 THz. The receiver uses a quadrature balanced scheme and two HEB mixers, fabricated from 4- to 5-nm-thick NbN film deposited on crystalline quartz substrate with an MgO buffer layer in between. We employed a novel micromachining method to produce all-metal waveguide parts at submicrometer accuracy (the main-mode waveguide dimensions are 90×180 [mu]m). We present details on the mixer design and measurement results, including receiver noise performance, stability and “first-light” at the telescope site. The receiver yields a double-sideband noise temperature averaged over the RF band below 1200 K, and outstanding stability with a spectroscopic Allan time more than 200 s.
%K HEB
%K mixer
%K waveguide
%K balanced
%K NbN
%R 10.1109/TMTT.2008.2008946
%U http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4711147
%U https://doi.org/10.1109/TMTT.2008.2008946
%P 89-98