Power Amplifier Performance Improvement Using Tunable Matching Network

Zakaria Settaf , Claude Duvanaud (1) , Hervé Cam , Jean-Marie Paillot (1) , Francis Huin , Smail Bachir (1)

1 XLIM-SIC - SIC

In mobile handsets, the power performance, efficiency, and transmission quality of wireless systems are degraded by the impedance mismatch between the transceiver and the antenna. Such a mismatch can be due to the component and antenna variations over the frequency and with environmental conditions. This paper presents a multiband tunable matching network (TMN) able to control the antenna impedance mismatch using lumped elements, and proposes a procedure to adapt the TMN. It has been tested in simulation on an integrated amplifier designed by ACCO on its patented CMOS technology. The TMN maintains the output power of the power amplifier around 31.4 dBm with a power added efficiency (PAE) of 51.5% at 900MHz for VSWR 3:1, and maintains the power around 30.2dBm with 38% PAE at 1900MHz for VSWR 3:1. In worst VSWR phase case, improvements of 3dB for output power and 10% for PAE are achieved.

Domaines: Electronique

Zakaria Settaf, Claude Duvanaud, Hervé Cam, Jean-Marie Paillot, Francis Huin, et al.. Power Amplifier Performance Improvement Using Tunable Matching Network. International Conference on Communication Systems ICCS'13, Oct 2013, Pilani, India. pp.1-9. ⟨hal-00936225⟩