Performance Evaluation of a Class E Power Amplifier Loaded by a High-Isolation Duplexer

Ajib Bahi (1) , Martine Villegas (1) , Antoine Diet (2) , Geneviève Baudoin (1) , Vaclav Valenta (1) , Jun Tsutsumi

1 ESYCOM - Electronique, Systèmes de communication et Microsystèmes
2 DRE - Département de Recherche en Electromagnétisme ; EMG - Département Electromagnétisme - L2S

This paper presents a performance evaluation of a class-E switched-mode power amplifier, designed in pHEMT GaAs technology, loaded by a high-isolation and low-Insertion Loss (IL) duplexer. This duplexer is based on Surface Acoustic Wave (SAW) technology. Measurements of the duplexer and layout of the class E PA are simulated under Agilent-ADS with a Wideband Code Division Multiple Access signal (WCDMA) in the 1.92 - 1.98 GHz band, for transmission scenario. In this band the amplifier alone achieved 75% to 82% efficiency and 23.5dBm to 24.2dBm output power. The association of the amplifier and the duplexer permitted to reach a drain efficiency of 78% while the output power is 22.7dBm at the central frequency, in the WCDMA band a minimum of 60% efficiency and 21dBm output power is maintained.

Keywords: Class E; Power amplifier; FBAR; duplexer

Domains: Engineering Sciences [physics]; Electronics

Ajib Bahi, Martine Villegas, Antoine Diet, Geneviève Baudoin, Vaclav Valenta, et al.. Performance Evaluation of a Class E Power Amplifier Loaded by a High-Isolation Duplexer. SMACD 2012, Sep 2012, Seville, Spain. pp.193-196, ⟨10.1109/SMACD.2012.6339450⟩. ⟨hal-00778184⟩