PT Unknown
AU Smirnov, KV
   Vachtomin, YB
   Antipov, SV
   Maslennikov, SN
   Kaurova, NS
   Drakinsky, VN
   Voronov, BM
   Gol'tsman, GN
   Semenov, AD
   Richter, H
   Hubers, H
TI Noise and gain performance of spiral antenna coupled HEB mixers at 0.7 THz and 2.5 THz
SE Proc. 14[super:th] Int. Symp. Space Terahertz Technol.
PY 2003
BP 405
EP 412
DE NbN HEB mixers
AB Noise and gain performance of hot electron bolometer (HEB) mixers based on ultrathin superconducting NbN films integrated with a spiral antenna was studied. The noise temperature measurements for two samples with different active area of 3 p.m x 0.24 .tni and 1.3 1..tm x 0.12 1.tm were performed at frequencies 0.7 THz and 2.5 THz. The best receiver noise temperatures 370 K and 1600 K, respectively, have been found at these frequencies. The influence of contact resistance between the superconductor and the antenna terminals on the noise temperature of HEB is discussed. The noise and gain bandwidth of 5GHz and 4.2 GHz, respectively, are demonstrated for similar HEB mixer at 0.75 THz.
ER