%0 Journal Article
%T Coupling of terahertz radiation to a high-Т(с) superconducting hot electron bolometer mixer
%A Gousev, Yu P.
%A Semenov, A. D.
%A Pechen, E. V.
%A Varlashkin, A. V.
%A Nebosis, R. S.
%A Renk K. F
%D 1996
%V 69
%F Gousev_etal1996
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=958), last updated on Fri, 03 Jul 2015 18:04:06 -0500
%X We report  on efficient coupling of THz radiation to a high-T(c) superconducting hot electron bolometer that is suitable for heterodyne detection. Our quasioptical system consisted of a planar self-complementary spiral antenna on a dielectric substrate clamped to an extended hyperhemispherical lens. The antenna was integrated into a co-planar line for broadband intermediate frequency matching. Measurements in the homodyne regime at a frequency of 2.5 THz showed a radiation pattern with a beam width of 1° and a coupling efficiency of 0.1. We measured, at an intermediate frequency of 1.5 GHz, an output noise temperature of'160 K and estimated for the device, operated in the heterodyne regime, a system noise temperature of 30 000 K. We also discuss possibilities of significant improvement of the sensitivity.
%P 691-693