Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Petr Vasina"'
Publikováno v:
IET Microwaves, Antennas & Propagation. 12:2313-2319
A beam- and polarisation-reconfigurable substrate integrated waveguide (SIW) ring-slot antenna array is proposed in this study. The 2×2 ring-slot antenna array can generate beams in four different directions in two orthogonal linear polarisations (L
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ca3f35edacc13b02b8f879c3db392fa
https://doi.org/10.1049/iet-map.2018.5192
https://doi.org/10.1049/iet-map.2018.5192
Autor:
Jaroslav Lacik, Petr Vasina
Publikováno v:
Radioengineering, Vol 26, Iss 1, Pp 85-90 (2017)
Radioengineering. 2017 vol. 26, č. 1, s. 85-90. ISSN 1210-2512
Radioengineering. 2017 vol. 26, č. 1, s. 85-90. ISSN 1210-2512
This paper deals with a substrate integrated waveguide (SIW) circularly polarized rectangular ring-slot antenna with chamfered corners designed for 5.8 GHz ISM frequency band for off-body communication. The antenna consists of a substrate integrated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24b9e9950b78ed6805d6ccce311d8bdd
http://www.radioeng.cz/fulltexts/2017/17_01_0085_0090.pdf
http://www.radioeng.cz/fulltexts/2017/17_01_0085_0090.pdf
Autor:
Tomas Kuparowitz, Petr Sedlak, Jiri Majzner, Vlasta Sedlakova, Brandon Buergler, Josef Sikula, Petr Vasina
Publikováno v:
Metrology and Measurement Systems, Vol 23, Iss 3, Pp 345-358 (2016)
Degradation of Supercapacitors (SC) is quantified by accelerated ageing tests. Energy cycling tests and calendar life tests are used since they address the real operating modes. The periodic characterization is used to analyse evolution of the SC par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::887ac959830bf02ba3d20c464dc5d6f8
http://www.degruyter.com/view/j/mms.2016.23.issue-3/mms-2016-0038/mms-2016-0038.xml?format=INT
http://www.degruyter.com/view/j/mms.2016.23.issue-3/mms-2016-0038/mms-2016-0038.xml?format=INT
Autor:
Tomas Kuparowitz, Petr Vasina, Vlasta Sedlakova, Jiri Majzner, Brandon Buergler, Petr Sedlak, Josef Sikula
Publikováno v:
Journal of Power Sources. 286:58-65
A new method for the determination of parameters for an equivalent electrical circuit model of supercapacitors is proposed. The method is based on the evaluation of the time dependence of voltage measured on the supercapacitor terminals after its cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0a70c34cdfaed23bda0bfba9aa90668
https://doi.org/10.1016/j.jpowsour.2015.03.122
https://doi.org/10.1016/j.jpowsour.2015.03.122
Autor:
Jaroslav Lacik, Petr Vasina
Publikováno v:
2017 Conference on Microwave Techniques (COMITE).
In this paper, a textile linear polarization reconfigurable antenna for 5.8 GHz band is proposed. It radiates linearly polarized wave which can be controlled in the range of angles ± 30° with respect to the longitudinal axis of the antenna with max
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a96698895af5e524150ce84139e4a920
https://doi.org/10.1109/comite.2017.7932311
https://doi.org/10.1109/comite.2017.7932311
Autor:
Petr Vasina, Jaroslav Lacik
Publikováno v:
2016 Loughborough Antennas & Propagation Conference (LAPC).
In this paper a linearly polarization reconfigurable substrate integrated waveguide (SIW) circular ring slot antenna for 5.8 GHz ISM band is proposed. The antenna consists of two dielectric layers: a feeding layer and a radiator layer. In the feeding
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::288df5324993e089223da3472e089870
https://doi.org/10.1109/lapc.2016.7807558
https://doi.org/10.1109/lapc.2016.7807558
Publikováno v:
2016 10th European Conference on Antennas and Propagation (EuCAP).
In the paper, we compare selected concepts of planar antennas developed for body-centric wireless communication to be operated in ISM frequency bands. Antennas, which were originally designed for Teflon-based substrates, have been redesigned for text
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40f5bf503f1281e3045bed5c84df3b81
https://doi.org/10.1109/eucap.2016.7481265
https://doi.org/10.1109/eucap.2016.7481265
Publikováno v:
Microelectronics Reliability. 42:849-854
Tantalum capacitor failure modes have been discussed both for the standard manganese dioxide cathode and the new conductive polymer (CP) type. For standard tantalum in the normal operation mode, an electrical breakdown can be stimulated by an increas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b692ac1efaab8806ed5f357b83e69911
https://doi.org/10.1016/s0026-2714(02)00034-3
https://doi.org/10.1016/s0026-2714(02)00034-3
Autor:
Petr Vasina, Josef Sikula, Munecazu Tacano, Jan Pavelka, Sumihisa Hashiguchi, Vlasta Sedlakova
Publikováno v:
Microelectronics Reliability. 42:841-847
A low frequency noise and charge carrier transport mechanisms were investigated on tantalum capacitors made by various producers. The model of Ta–Ta2O5–MnO2 MIS structure was used to give physical interpretation of I–V characteristics in normal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c413d8e5da43352b1c356f634d494a7
https://doi.org/10.1016/s0026-2714(02)00013-6
https://doi.org/10.1016/s0026-2714(02)00013-6
Autor:
Petr Vasina, David Latif, Marek Simcak, Valery Gineste, Lukas Diblik, Bertrand Faure, Brandon Buergler
Publikováno v:
E3S Web of Conferences, Vol 16, p 17003 (2017)
Supercapacitors offer a wide range of applications for space flight. The aim of this activity was to pursue life tests on commercial off the shelf (COTS) supercapacitors from different manufacturers, to evaluate their performance after long term vacu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f742d1cf5b34ebcb0196ed74c110d790
https://doi.org/10.1051/e3sconf/20171617003
https://doi.org/10.1051/e3sconf/20171617003