@Article{Meledin_etal2009,
author="Meledin, Denis
and Pavolotsky, Alexey
and Desmaris, Vincent
and Lapkin, Igor
and Risacher, Christophe
and Perez, Victor
and Henke, Douglas
and Nystrom, Olle
and Sundin, Erik
and Dochev, Dimitar
and Pantaleev, Miroslav
and Fredrixon, Mathias
and Strandberg, Magnus
and Voronov, Boris
and Goltsman, Gregory
and Belitsky, Victor",
title="A 1.3-THz balanced waveguide HEB mixer for the APEX telescope",
journal="IEEE Trans. Microw. Theory Techn.",
year="2009",
volume="57",
number="1",
pages="89--98",
optkeywords="HEB; mixer; waveguide; balanced; NbN",
abstract="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{\texttimes}180 $\mu$m). We present details on the mixer design and measurement results, including receiver noise performance, stability and {\^a}{\texteuro}{\oe}first-light{\^a}{\texteuro} 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.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=554), last updated on Sun, 22 May 2016 16:12:17 -0500",
issn="0018-9480",
doi="10.1109/TMTT.2008.2008946",
opturl="http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4711147",
opturl="https://doi.org/10.1109/TMTT.2008.2008946"
}