Spectral Response and Noise Temperature of a 2.5 THz Spiral Antenna Coupled NbN HEB Mixer
| Autor: | Q.J. Yao, Z.H. Lin, S.C. Shi, W. Miao, J.R. Gao, G.N. Gol'tsman, W. Zhang |
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| Rok vydání: | 2012 |
| Předmět: |
Hot electron bolometer mixer
Physics Spiral antenna Noise temperature Terahertz radiation business.industry Bolometer Astrophysics::Instrumentation and Methods for Astrophysics Physics::Optics Biasing Astrophysics::Cosmology and Extragalactic Astrophysics Physics and Astronomy(all) law.invention Lens (optics) Quantum efficiency factor law Optoelectronics Quantum efficiency Antenna (radio) business Astrophysics::Galaxy Astrophysics Receiver noise temperature Computer Science::Information Theory |
| Zdroj: | Physics Procedia. 36:334-337 |
| ISSN: | 1875-3892 |
| DOI: | 10.1016/j.phpro.2012.06.169 |
| Popis: | We report on a 2.5 THz spiral antenna coupled NbN hot electron bolometer (HEB) mixers, fabricated with in-situ process. The receiver noise temperature with lowest value of 1180 K is in good agreement with calculated quantum efficiency factor as a function of bias voltage. In addition, the measured spectral response of the spiral antenna coupled NbN HEB mixer shows broad frequency coverage of 0.8-3 THz, and corrected response for optical losses, FTS, and coupling efficiency between antenna and bolometer falls with frequency due to diffraction-limited beam of lens/antenna combination. |
| Databáze: | OpenAIRE |
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