Print Email Facebook Twitter THz Imaging Using Uncooled Wideband Direct Detection Focal Plane Arrays Title THz Imaging Using Uncooled Wideband Direct Detection Focal Plane Arrays Author van Berkel, S.L. (TU Delft Tera-Hertz Sensing) Yurduseven, O. (TU Delft Tera-Hertz Sensing) Freni, Angelo (University of Florence) Neto, A. (TU Delft Tera-Hertz Sensing) Llombart, Nuria (TU Delft Tera-Hertz Sensing) Date 2017 Abstract In millimeter and submillimeter-wave radiometric imaging systems, a persistent goal is the increase in the speed of acquisition of the image while maintaining a high sensitivity. Typically, the highest sensitivity is achieved by cryogenically cooling the detectors, specifically in astronomical applications. However, for the purpose of low-cost imaging applications, it is desirable to operate at room temperature. Without cryogenically cooling, the electronic noise introduced by the detectors becomes dominant, making the detectors less sensitive. Resorting to detection architectures containing amplification circuitry might be impractical for implementation in large focal plane arrays (FPAs) fabricated in integrated technologies. This contribution derives the focal plane architecture that maximizes the imaging speed of radiometers operating at room temperature without using any amplification circuitry. It is shown that in such scenario a practical image acquisition speed can still be achieved when a very broad portion of the THz-band is exploited. Ultimately, the imaging speed is maximized when the FPA is undersampled, implying a tradeoff in the size of the optics. The analysis is substantiated by a case study with recently developed wideband leaky lens antenna feeds operating from 200 to 600 GHz. Subject Direct detectionfocal plane arrays (FPAs)leaky lens antennaspassive imagingradiometrywideband antennas To reference this document use: http://resolver.tudelft.nl/uuid:e7f36c2d-be27-467a-af4b-44dd1995120c DOI https://doi.org/10.1109/TTHZ.2017.2736338 ISSN 2156-342X Source IEEE Transactions on Terahertz Science and Technology, 7 (5), 481-492 Part of collection Institutional Repository Document type journal article Rights © 2017 S.L. van Berkel, O. Yurduseven, Angelo Freni, A. Neto, Nuria Llombart Files PDF 08016629.pdf 1.86 MB Close viewer /islandora/object/uuid:e7f36c2d-be27-467a-af4b-44dd1995120c/datastream/OBJ/view