Investigation of Tunable Matching Circuits for Multiband 4G Handsets
Résumé
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