Title :
A low-cost closed-loop antenna tuner module for mobile phone single-feed multi-band antennas
Author :
de Jongh, M.A. ; van Bezooijen, A. ; Bakker, T. ; Boyle, K.R. ; Stulemeijer, J.
Author_Institution :
SAW Components Div., EPCOS Netherlands B.V., Nijmegen, Netherlands
Abstract :
Mobile phones operate in many frequency bands, while antenna volume is restricted. In addition, effects of user interaction can change matching between antenna and front-end module drastically. We show a multi-band multi-mode Antenna Tuner Module (ATM) that improves antenna matching automatically. It measures 4 × 4 × 1 mm3 and requires only DC, synchronization inputs by MIPI or GPIO, and a self-learning calibration process. The ATM covers a very broad frequency range of 600 to 2700 MHz and has an insertion loss less than 0.6 dB for a 50 Ω load. The ATM fulfills all challenging requirements for placement in a mobile phone antenna system, such as low distortion products under mismatch conditions, high ruggedness (+34 dBm at a load VSWR circle of 12:1) and an ESD contact discharge level of 8 kV.
Keywords :
antennas; calibration; mobile handsets; synchronisation; ESD contact discharge level; antenna matching; antenna volume; closed loop antenna tuner module; frequency bands; front end module; insertion loss; mobile phone antenna system; mobile phone single feed multiband antennas; multiband multimode antenna tuner module; self-learning calibration process; synchronization; user interaction; Antenna measurements; Capacitors; Insertion loss; Mobile antennas; Radio frequency; Tuners; RLC circuits; adaptive systems; mobile antennas; reconfigurable systems; tunable circuits and devices;
Conference_Titel :
Microwave Conference (EuMC), 2013 European
Conference_Location :
Nuremberg
