Investigation of Tunable Matching Circuits for Multiband 4G Handsets

A. Cihangir (1) , Fabien Ferrero (1) , C. Luxey (2) , Alexandre Reinhardt (3) , L. Dussopt (3) , Nicolas Lorphelin (4) , Nizar Obeid (4) , P. Brachat (5)

1 LEAT - Laboratoire d'Electronique, Antennes et Télécommunications
2 EpOC - Electronique pour Objets Connectés
3 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
4 DELFMEMS
5 FT R&D - France Télécom Recherche & Développement

Two antenna designs with tunable matching circuits suitable for 4G mobile terminals are presented. SPDT MEMS switches and tunable capacitors as active components are evaluated in those two different antenna topologies, in scope of the Artemos European project. The target bands include the 4G communication bands, i.e. 700-960MHz as the low-band (LB) and 1.7-2.7GHz as the high-band (HB). In the first design, the antenna operates in the target bands using two SPDT MEMS switches and a two-branched matching network. The second design is a dual-feed structure, where the LB reflection coefficient is tuned using a BST capacitor while the coverage in HB is permanent.

Mots clés: tunable matching circuits; Long Term Evolution; UHF antennas; circuit tuning; cellular radio; 4G mobile communication; antenna feeds; multiband 4G handsets; UHF circuits; antenna designs; 4G mobile terminals; SPDT MEMS switches; tunable capacitors; antenna topologies; Artemos European project; 4G communication bands; two-branched matching network; dual-feed structure; LB reflection coefficient; BST capacitor; mobile cellular communication; LTE-Advanced; frequency 700 MHz to 960 MHz; frequency 1.7 GHz to 2.7 GHz; Capacitors; Microswitches; Antenna measurements; Reflection coefficient; Reflector antennas; MEMS switch; tunable element; antenna; 4G; LTE

Domaines: Electromagnétisme

A. Cihangir, Fabien Ferrero, C. Luxey, Alexandre Reinhardt, L. Dussopt, et al.. Investigation of Tunable Matching Circuits for Multiband 4G Handsets. 8th European Conference on Antennas and Propagation (EuCAP 2014), Apr 2014, La Hague, Netherlands. 601-604, 1569845315.pdf, ⟨10.1109/EuCAP.2014.6901830⟩. ⟨hal-00979569⟩