DET - Laboratorio di Microelettronica MICLAB

This talk is focused on the linearization of innovative PA concepts aimed at the applications of beyond-3G wireless systems. After a brief recall about the design techniques for the efficiency enhancement in wide dynamic broad band signals and concurrent dual band signals, the specific linearization techniques will be focused and described by experimental and simulated data. Finally, a comprehensive valuation of the above techniques performance is presented with respect to other efficient and more conventional PA design techniques.

Full paper presentation: A. Cidornali, N. Giovannelli, I. Magrini, G. Manes"Compact Concurrent Dual-Band Power Amplifier for 1.98 GHz WCDMA and 3.42 GHz OFDM Wireless System: Design and Characterisation"

This paper is aimed at introducing the design approach and the system level characterization of a compact concurrent dual-band PA based on COTS devices for 1.98 GHz 3GPP UL WCDMA and 3.42 GHz 5 MHz 16QAM WiMAX wireless systems. The prototype features are compared with dedicated single-band PAs to objectively assess the capability of this concurrent dual-band design approach. The prototype exhibited a simultaneous maximum power level of 23 dBm at the lower band and 16.5 dBm at the higher band to maintain ACPR for the WCDMA signal below 33 dBc and EVM for the WiMAX signal below 5%. When compared with single-band mode these power levels result reduced of 4.5 dB and 3.5 dB respectively. The investigated PA topology provides a PAE of 36%, while the ideal combination of the two single-band PA prototypes, to achieve the same dual-band characteristic, would lead to a 25.7% PAE.