A Package-Integrated Chireix Outphasing RF Switch-Mode High-Power Amplifier

作者：Calvillo Cortes David A^*; van der Heijden Mark P; Acar Mustafa; de Langen Michel; Wesson Robin; van Rijs Fred; de Vreede Leo C N

来源：IEEE Transactions on Microwave Theory and Techniques, 2013, 61(10): 3721-3732.

DOI：10.1109/TMTT.2013.2279372

• Base station
• bondwire
• broadband
• Chireix combiner
• class E
• outphasing transmitter
• power amplifier (PA)
• switch mode
• transformer

This paper describes the design and implementation of a package-integrated Chireix outphasing RF switch-mode power amplifier (PA). The optimum loading conditions, based on class E, and the Chireix compensation elements are provided to the active devices by a dedicated low-loss bondwire-based transformer power combiner that enables a very small form factor and low cost. The realized prototype achieved 70.6-W peak power with 73% peak drain efficiency at 2.3 GHz and 28 V, and up to 81% peak drain efficiency at 2.2 GHz and 20 V. When operated for maximum power at 28 V, it reached 53.5%/43.5% average drain/total efficiency for a 9.6-dB peak-to-average-power-ratio W-CDMA signal at 2.3 GHz with low ACLR1/2 levels (-49/-56 dBc after memoryless digital predistortion). Moreover, from 2.1 to 2.4 GHz, the realized PA demonstrated more than 50% drain efficiency across %26gt;260, %26gt;160, and %26gt;80 MHz at 6-, 8-, and 10-dB back-off, respectively.

• 出版日期2013-10