@Article{MeledinD._etal2008,
author="Meledin D.
and Desmaris V.
and Ferm S.-E.
and Fredrixon M.
and Henke D.
and Lapkin I.
and Nystr{\"o}m O.
and Pantaleev M.
and Pavolotsky A.
and Strandberg M.
and Sundin E.
and Belitsky V.",
title="APEX Band T2: A 1.25 -- 1.39 THz Waveguide  Balanced HEB Receiver",
year="2008",
pages="181--185",
abstract="A waveguide 1.25--1.39 THz Hot Electron Bolometer (HEB) balanced receiver was successfully developed, characterized and installed at the Atacama Pathfinder EXperiment (APEX) telescope. The receiver employs a quadrature balanced scheme using a waveguide 90-degree 3 dB RF hybrid, HEB mixers and a 180-degree IF hybrid. The HEB mixers are based on ultrathin NbN film deposited on crystalline quartz with a MgO buffer layer. Integrated into the multi-channel APEX facility receiver (SHeFI), the results presented here demonstrate exceptional performance; a receiver  noise temperature of 1000 K measured at the telescope at the center of the receiver IF band 2-4 GHz, and at an LO frequency of 1294 GHz. Stability of the receiver is fully in line with the SIS mixer bands of the SHeFI, and gives a spectroscopic Allan time of more than 200 s with a noise bandwidth of 1 MHz.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=974), last updated on Mon, 06 Jul 2015 17:32:56 -0500"
}