Telephony: an antenna that follows you from network to network

Cell phone antennas are now so tiny that they can no longer adapt to different networks’ frequency bands, seriously impairing data transmission and call quality. Leti is working on a smart miniature antenna capable of adapting its impedance all on its own. The antenna already covers GSM, DCS, UMTS, Wi-Fi, and LTE; low 4G frequencies could soon be added to the mix.
Leti researchers combined an antenna with a reconfigurable adaptation circuit that uses 130-nm CMOS-SOI technology. The device can withstand power in excess of 2 W, making it compatible with telephone transmission circuits. The researchers also built a demonstrator to validate the device, developed under the EU C2Power project to improve the energy efficiency of handsets.

Contact: laurent.dussopt@cea.fr

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