Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Hannu Sipola"'
Autor:
Visa Vesterinen, Nuria Llombart, Leif Grönberg, Hannu Sipola, Juha Hassel, Erio Gandini, Shahab Oddin Dabironezare
Publikováno v:
IEEE Transactions on Terahertz Science and Technology, 8(6)
Dabironezare, S, Hassel, J, Gandini, E, Gronberg, L, Sipola, H, Vesterinen, V & Llombart, N 2018, ' A Dual Band Focal Plane Array of Kinetic Inductance Bolometers Based on Frequency Selective Absorbers ', IEEE Transactions on Terahertz Science and Technology, vol. 8, no. 6, 8481541, pp. 746-756 . https://doi.org/10.1109/TTHZ.2018.2873973
IEEE Transactions on Terahertz Science and Technology
Dabironezare, S, Hassel, J, Gandini, E, Gronberg, L, Sipola, H, Vesterinen, V & Llombart, N 2018, ' A Dual Band Focal Plane Array of Kinetic Inductance Bolometers Based on Frequency Selective Absorbers ', IEEE Transactions on Terahertz Science and Technology, vol. 8, no. 6, 8481541, pp. 746-756 . https://doi.org/10.1109/TTHZ.2018.2873973
IEEE Transactions on Terahertz Science and Technology
Passive imaging cameras at sub-millimeter wavelengths with large format focal plane arrays are being developed as the next generation of security screening systems. In this contribution, a dual-band focal plane array (FPA) for security imagers at sub
Autor:
Hannu Sipola, Anssi Rautiainen, Hannu Lindström, Nuria Llombart, Aleksi Tamminen, Arttu Luukanen, Erio Gandini, Shahab Oddin Dabironezare, Hannu Vasama, Mikko Leivo, Leif Grönberg, Juha Hassel
Publikováno v:
Hassel, J, Dabironezare, S O, Gandini, E, Grönberg, L, Sipola, H, Rautiainen, A, Tamminen, A, Leivo, M, Lindström, H, Vasama, H, Luukanen, A & Llombart, N 2018, Dual-band submillimeter-wave kinetic inductance bolometers and an imaging system for contraband object detection . in Passive and Active Millimeter-Wave Imaging XXI ., 106340F, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 10634, Passive and Active Millimeter-Wave Imaging XXI 2018, Orlando, United States, 18/04/18 . https://doi.org/10.1117/12.2304722
Kinetic inductance bolometer (KIB) technology is a candidate for scalable submillimeter wave imaging systems, particularly suitable for person security screening applications. We have previously shown that the basic figures of merit are compatible wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7009f57365d16bd1733c97922be99a16
https://cris.vtt.fi/en/publications/76ec4700-1bba-4046-91fc-9caed119f44d
https://cris.vtt.fi/en/publications/76ec4700-1bba-4046-91fc-9caed119f44d
Publikováno v:
Helistö, P, Sipola, H, Seppä, H & Manninen, A J 2015, ' MEMS-based voltage detector ', Sensors and Actuators A: Physical, vol. 234, pp. 99-103 . https://doi.org/10.1016/j.sna.2015.08.011
A novel principle of low-noise voltage measurement based on microelectromechanical systems (MEMS) is introduced and experimentally demonstrated. The method is based on parametric conversion of voltage via electromechanical force to the amplitude of t
Autor:
Hannu Sipola, Juha Ala-Laurinaho, Mika Aikio, Visa Vesterinen, Juho Luomahaara, Andrey Timofeev, Leif Grönberg, Kirsi Tappura, Aki Mäyrä, Mikko Metso, Arttu Luukanen, Juha Hassel
Publikováno v:
Timofeev, A, Luomahaara, J, Grönberg, L, Mäyrä, A, Sipola, H, Aikio, M, Metso, M, Vesterinen, V, Tappura, K, Ala-Laurinaho, J, Luukanen, A & Hassel, J 2017, ' Optical and electrical characterization of a large kinetic inductance bolometer focal plane array ', IEEE Transactions on Terahertz Science and Technology, vol. 7, no. 2, 7811297, pp. 218-224 . https://doi.org/10.1109/TTHZ.2016.2639470
Sub-THz imaging techniques are currently emerging with applications especially in security screening requiring higher throughput in mass transit and public areas. In the context of person imagers, the field of view and the spatial resolution set the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5e6201172226ced056c8950487cf9ba
https://cris.vtt.fi/en/publications/c28bce60-efcc-4404-93b8-f88e9bd9b02b
https://cris.vtt.fi/en/publications/c28bce60-efcc-4404-93b8-f88e9bd9b02b
Autor:
Leif Grönberg, Andrey Timofeev, Hannu Sipola, Juho Luomahaara, Arttu Luukanen, Anssi Rautiainen, Juha Hassel
Publikováno v:
Sipola, H, Luomahaara, J, Timofeev, A, Grönberg, L, Rautiainen, A, Luukanen, A & Hassel, J 2019, ' Multiplexed readout of kinetic inductance bolometer arrays ', Review of Scientific Instruments, vol. 90, no. 7, 074702 . https://doi.org/10.1063/1.5091754
Kinetic inductance bolometer (KIB) technology is a candidate for passive sub-millimeter wave and terahertz imaging systems. Its benefits include scalability into large 2D arrays and operation with intermediate cryogenics in the temperature range of 5
Publikováno v:
Helistö, P, Sipola, H & Seppä, H 2012, ' Noise suppression of MEMS readout near pull-in ', Sensors and Actuators A: Physical, vol. 183, pp. 101-104 . https://doi.org/10.1016/j.sna.2012.05.015
We show that electromechanical feedback in MEMS sensors can be used to eliminate the noise of the readout electronics near the pull-in point, at which the force-to-displacement gain of the system becomes infinite. Displacement bias through electrical
Publikováno v:
Helistö, P, Sipola, H & Seppä, H 2012, ' Use of Electromechanical Feedback in MEMS for Suppressing Electronics Noise ', Procedia Engineering, vol. 47, pp. 1013-1016 . https://doi.org/10.1016/j.proeng.2012.09.319
At the pull-in point, a capacitive MEMS sensor becomes infinitely sensitive to applied force as the effective spring constant goes to zero because of electromechanical feedback We show that this phenomenon can be used to fully eliminate the noise con
Autor:
Leif Grönberg, Aki Mäyrä, Andrey Timofeev, Hannu Sipola, Visa Vesterinen, Panu Helistö, Mika Aikio, Juha Hassel, Arttu Luukanen
Publikováno v:
Hassel, J, Timofeev, A V, Vesterinen, V, Sipola, H, Helistö, P, Aikio, M, Mäyrä, A, Grönberg, L & Luukanen, A 2015, Bolometric kinetic inductance detector technology for sub-millimeter radiometric imaging . in Millimetre Wave and Terahertz Sensors and Technology VIII . vol. 9651, 96510G, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 9651, SPIE Security + Defence 2015, Toulouse, France, 21/09/15 . https://doi.org/10.1117/12.2197522
Radiometric sub-millimeter imaging is a candidate technology especially in security screening applications utilizing the property of radiation in the band of 0.2 - 1.0 THz to penetrate through dielectric substances such as clothing. The challenge of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef0e124c35f9121310be7f7b3ad89114
https://doi.org/10.1117/12.2197522
https://doi.org/10.1117/12.2197522
Publikováno v:
Penttilä, J S, Sipola, H, Helistö, P & Seppä, H 2006, ' Low-noise readout of superconducting bolometers based on electrothermal feedback ', Superconductor Science and Technology, vol. 19, no. 4, pp. 319-322 . https://doi.org/10.1088/0953-2048/19/4/013
We have developed a simple room-temperature readout for superconducting bolometers and calorimeters. Due to electro-thermal feedback, the bolometer can be noise-matched with the readout amplifier. The constructed amplifier consists of low-noise field
Publikováno v:
Manninen, A, Helistö, P, Sipola, H, Roschier, L, Iisakka, I & Immonen, P 2014, Null Detector and AC Voltage Reference Based on MEMS . in 29th Conference on Precision Electromagnetic Measurements (CPEM 2014) . IEEE Institute of Electrical and Electronic Engineers, CPEM Digest (Conference on Precision Electromagnetic Measurements), vol. 29, pp. 424-425, 29th Conference on Precision Electromagnetic Measurements, CPEM 2014, Rio de Janeiro, Brazil, 24/08/14 . https://doi.org/10.1109/CPEM.2014.6898440
This paper describes our work with two applications of microelectromechanical systems (MEMS): a sensitive voltmeter that can be used e.g. as a null detector, and a stand-alone AC voltage reference. Both applications are based on the pull-in effect in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01880a0455d5aef8198b33cd3666320e
https://cris.vtt.fi/en/publications/4f4cb917-155e-43e1-b6bf-c528c133cc11
https://cris.vtt.fi/en/publications/4f4cb917-155e-43e1-b6bf-c528c133cc11