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We report on the use of a superconducting hot‐electron bolometer mixer for heterodyne detection of terahertz radiation. Radiation with a wavelength of 119 μm was coupled to the mixer, a NbN microbridge, by a hybrid quasioptical antenna consisting of an extended hyperhemispherical lens and a planar logarithmic spiral antenna. We found, at an intermediate frequency of 1.5 GHz, a system double side band noise temperature of ≊40 000 K and conversion losses of 25 dB. We also discuss the possibilities of further improvement of the mixer performance. © 1996 American Institute of Physics.
Published in:
Applied Physics Letters
(Volume:69
,
Issue:
2
)
Date of Publication: Jul 1996
- Page(s):
- 260 - 262
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.117943
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Jul 1996
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