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Patch antennas for the new GNSS: better reception in a changing world / G. Panther in GPS world, vol 23 n° 2 (February 2012)

Public [article]  inGPS world > vol 23 n° 2 (February 2012) . - pp 52 - 58 Titre : Patch antennas for the new GNSS: better reception in a changing world Type de document : Article/Communication Auteurs : G. Panther, Auteur Année de publication : 2012 Article en page(s) : pp 52 - 58 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes IGN] largeur de bande [Termes IGN] récepteur GNSS Résumé : (Auteur) Small ceramic patch elements offer nearly perfect single-frequency receive characteristics and have become the standard for GPS L1 antennas. However, the new generation of GNSS receivers now being introduced track many satellites in multiple constellations. Are these narrow-band devices up to the task for wider bandwidths? Numéro de notice : A2012-053 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31501 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
067-2012021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

GNSS antennas and humans: a study of their interactions / J. Bancroft in GPS world, vol 23 n° 2 (February 2012)

Public [article]  inGPS world > vol 23 n° 2 (February 2012) . - pp 60 - 66 Titre : GNSS antennas and humans: a study of their interactions Type de document : Article/Communication Auteurs : J. Bancroft, Auteur ; V. Renaudin, Auteur ; A. Morrison, Auteur ; Gérard Lachapelle, Auteur Année de publication : 2012 Article en page(s) : pp 60 - 66 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes IGN] antenne GNSS [Termes IGN] propagation du signal Résumé : (Editeur) GPS is virtually ubiquitous with more than 400 milIion units estimated to be in use in the United States alone. Some of these units are standalone devices such as those used in surveying and timing applications and those used for vehicle navigation or tracking with permanent or temporary mountings. However, the majority of the units are integrated into cellular telephones, tablet computers, personal digital assistants, watches, cameras, and other devices, which are designed to operate in close contact with the human body. We even now have GPS shoes! It is well known that the performance of the antenna of a radio receiver can be affected when it is used in close proximity to the human body. So, when we use a handheld GPS receiver or wear a GPS watch, or put a GPS-equipped cellular telephone up to our ear, are there any effects on the operation of the receiver? It turns out that there are four major effects that can change the performance of a GPS (or other GNSS) receiver antenna when placed near or on the human body. [...] All these factors need to be taken into consideration when a manufacturer is designing a GPS unit to be operated in close proximity to a human body. Trade-offs might be possible and certains designs may make the antenna less likely to interact with its surroundings. But how does one go about assessing the antenna's performance in a repeatable and quantifiable way? [...] A team of researchers from the University of Calgary report n tests conducted on two different types of GPS antennas operated in the vicinity of a human phantom - an artificial body with similar electromagnetic properties as that of a real human. Numéro de notice : A2012-054 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31502 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
067-2012021	RAB	Revue	Centre de documentation	En réserve L003	Disponible