{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T12:11:17Z","timestamp":1767183077842,"version":"build-2065373602"},"reference-count":42,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2024,4,17]],"date-time":"2024-04-17T00:00:00Z","timestamp":1713312000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The interest in precise point positioning techniques using smartphones increased with the launch of the world\u2019s first dual-frequency L1\/L5 GNSS smartphone, Xiaomi Mi 8. The smartphone GNSS antenna is low-cost, sensitive to multipath, and limited by physical space and design. The main purpose of this work is to determine the mechanical location and antenna performance in terms of radiation pattern in an anechoic chamber using a Vector Network Analyzer (VNA) and robotic positioning platform by varying the elevation and azimuth angles between the transmitter and smartphone GNSS antennas; the power received and satellite visibility are developed in an outdoor scenario. The results show a Planar Inverted-F Antenna with an omnidirectional radiation pattern without gain. The L1\/E1\/B1 and L5\/E5a\/B2a GNSS antennas are physically located at the top face of the screen, with dimensions of 48 \u00d7 17 mm and 60 \u00d7 13 mm, respectively. With the screen with line-of-sight toward the sky, L5 satellites have a better signal\u2013noise ratio (SNR), unlike the back side, which loses 99% of the data in the PPP solution. Under multipath scenarios, the L1 GNSS smartphone antenna works with 25% less power than the GPS user segment recommendation, showing high sensitivity to track weak signals.<\/jats:p>","DOI":"10.3390\/s24082569","type":"journal-article","created":{"date-parts":[[2024,4,17]],"date-time":"2024-04-17T08:22:44Z","timestamp":1713342164000},"page":"2569","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Comprehensive Analysis of Xiaomi Mi 8 GNSS Antenna Performance"],"prefix":"10.3390","volume":"24","author":[{"given":"M\u00f3nica","family":"Zabala Haro","sequence":"first","affiliation":[{"name":"Department of Cartographic, Geodesy and Photogrammetry Engineering, Higher Technical School of Geodetic, Cartographic and Topographical Engineering, Universitat Polit\u00e8cnica de Val\u00e8ncia, Campus de Vera s\/n, 46022 Valencia, Spain"},{"name":"Telecommunications Engineering School, Faculty of Computer Science and Electronics, Escuela Superior Polit\u00e9cnica de Chimborazo (ESPOCH), Campus Chimborazo, Riobamba EC060155, Ecuador"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9379-0694","authenticated-orcid":false,"given":"\u00c1ngel","family":"Mart\u00edn Furones","sequence":"additional","affiliation":[{"name":"Department of Cartographic, Geodesy and Photogrammetry Engineering, Higher Technical School of Geodetic, Cartographic and Topographical Engineering, Universitat Polit\u00e8cnica de Val\u00e8ncia, Campus de Vera s\/n, 46022 Valencia, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6024-3790","authenticated-orcid":false,"given":"Ana","family":"Anquela Juli\u00e1n","sequence":"additional","affiliation":[{"name":"Department of Cartographic, Geodesy and Photogrammetry Engineering, Higher Technical School of Geodetic, Cartographic and Topographical Engineering, Universitat Polit\u00e8cnica de Val\u00e8ncia, Campus de Vera s\/n, 46022 Valencia, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1212-4292","authenticated-orcid":false,"given":"Mar\u00eda Jes\u00fas","family":"Jim\u00e9nez-Mart\u00ednez","sequence":"additional","affiliation":[{"name":"Department of Cartographic, Geodesy and Photogrammetry Engineering, Higher Technical School of Geodetic, Cartographic and Topographical Engineering, Universitat Polit\u00e8cnica de Val\u00e8ncia, Campus de Vera s\/n, 46022 Valencia, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,17]]},"reference":[{"key":"ref_1","unstructured":"El-Rabbany, A. 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