Development of integrated HEB/MMIC receivers for near-range terahertz imaging
| Autor: | Dazhen Gu, K. S. Yngvesson, J.J. Nicholson, Fernando Rodriguez-Morales, Xin Zhao, Eyal Gerecht, R. Zannoni, Niklas Wadefalk |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Physics
Noise temperature Radiation business.industry Terahertz radiation Amplifier Integrated circuit Condensed Matter Physics law.invention Microwave imaging Intermediate frequency law Broadband Electronic engineering Optoelectronics Electrical and Electronic Engineering business Monolithic microwave integrated circuit Caltech Library Services |
| Popis: | We present measurement results for a new type of integrated terahertz receiver, as an extension to previous work by the authors. The receiver we developed integrates quasi-optically coupled phonon-cooled NbN hot electron bolometric (HEB) mixers in close proximity with InP monolithic microwave integrated circuit (MMIC) intermediate-frequency (IF) amplifiers. We have measured antenna radiation pattern, receiver noise temperature, and bandwidth, as well as short-term stability of the integrated receivers. The measurements were performed at 1.6 and 2.5 THz over a very broadband IF frequency range. We have been able to extend the effective bandwidth of these receivers up to 5 GHz, the widest reported for any integrated configuration operating above 1 THz. The suitability of the HEB/MMIC approach for imaging applications has been confirmed through the development of a prototype system for near-range scanning. The results presented here are very promising for the future development of heterodyne focal plane arrays for space-based receivers, medical applications, and surveillance. |
| Databáze: | OpenAIRE |
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