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Mobile-phone GPS antennas / T. Haddrell in GPS world, vol 21 n° 2 (February 2010)

Public [article]  inGPS world > vol 21 n° 2 (February 2010) . - pp 29 - 35 Titre : Mobile-phone GPS antennas Type de document : Article/Communication Auteurs : T. Haddrell, Auteur ; M. Phocas, Auteur ; N. Ricquier, Auteur Année de publication : 2010 Article en page(s) : pp 29 - 35 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] antenne GPS [Termes IGN] positionnement par GPS [Termes IGN] téléphonie mobile Résumé : (Auteur) Do the GPS receivers in our mobile phones now work everywhere? Sadly, no. Consumers demand that their phones not only provide voice communications and GPS but also Bluetooth connectivity to headsets, WiFi, and even an FM transmitter, all in a small form factor at reasonable cost. This requires miniaturizing the GPS antenna and possibly integrating it with the other radio services on the platform. Such compromises can, if the designer is not careful, significantly reduce receiver effectiveness with dramatically reduced antenna gain and distorted antenna patterns. This month we look at some antenna designs providing GPS functionality to mobile phones and examine why most phones still do not provide GPS operation indoors or in other challenging environments. We also find out what it will take to make them better. Copyright Questex Media Group Numéro de notice : A2010-027 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30223 [article]

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