An efficient two-port antenna-system for GSM/DCS/UMTS multi-mode mobile phones

Aliou Diallo (1) , Cyril Luxey , Philippe Le Thuc (1) , Robert Staraj (1) , Georges Kossiavas (1)

1 LEAT - Laboratoire d'Electronique, Antennes et Télécommunications

The design of several two-port antenna systems for mobile phones is presented. All these structures are made up of two planar inverted-F antennas closely positioned on a small ground plane and radiating in the GSM900/DCS1800 and UMTS frequency bands. First, the antennas are simply associated at the top edge of the same printed circuit board. Thus, to improve their isolation and their total efficiency, a neutralisation effect is created by means of an optimised suspended line, which links the feeding strips of the radiators. The performance of these systems is measured and compared with theoretical results.

Mots clés: antenna system; 3G mobile communication; cellular radio; mobile handsets; mobile antennas; planar inverted-F antennas; printed circuit board; mobile phones; UMTS frequency bands; GSM900-DCS1800

Domaines: Electromagnétisme

Aliou Diallo, Cyril Luxey, Philippe Le Thuc, Robert Staraj, Georges Kossiavas. An efficient two-port antenna-system for GSM/DCS/UMTS multi-mode mobile phones. Electronics Letters, 2007, 43 (7), pp.369-370. ⟨10.1049/el:20073911⟩. ⟨hal-00342341⟩