64378 20190709135703.0 doi 10.1155/2017/7192491 sideral 103387 ART-2017-103387 eng (orcid)0000-0001-5849-5198 Carro, Pedro Luis Universidad de Zaragoza Statistical Antenna Proximity Effect Modeling with Uncertainty Impedance Ellipses 2017 Access copy available to the general public Unrestricted User effects on portable antennas can decrease the global terminal performance, such as reducing the battery life or the wireless coverage. People presence will modify the input impedance, the far field radiation pattern, the radiation efficiency, and the near field. In this paper, we investigate the influence of the user on the input impedance by means of a new statistical approach which relies on uncertainty, where a handheld antenna works in two modes (data and talk) while people couple to the antenna. Studying some reflection coefficient measurements performed with a vector network analyzer (VNA), a standard framework based on uncertainty ellipses is developed. Finally, the method is applied to some antenna prototypes, showing its advantages and reliability to quantify and compare proximity effects. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 1.378 2017 TELECOMMUNICATIONS 60 / 87 = 0.69 2017 Q3 T3 ENGINEERING, ELECTRICAL & ELECTRONIC 168 / 260 = 0.646 2017 Q3 T2 0.233 2017 Electrical and Electronic Engineering 2017 Q3 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0002-2796-5916 de Mingo, Jesús Universidad de Zaragoza (orcid)0000-0002-7452-446X García-Dúcar, Paloma Universidad de Zaragoza (orcid)0000-0003-2664-6339 Valdovinos, Antonio Universidad de Zaragoza 5008 800 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Teoría Señal y Comunicac. 5008 560 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Ingeniería Telemática 2017 (2017), 11 INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION 1687-5869 838707 http://zaguan.unizar.es/record/64378/files/texto_completo.pdf Versión publicada 89146 http://zaguan.unizar.es/record/64378/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:64378 articulos driver 2019-07-09-12:50:27 ARTICLE