Dynamic Load Modulation With a Reconfigurable Matching Network for Efficiency Improvement Under Antenna Mismatch

作者：Sanchez Perez Cesar^*; de Mingo Jesus; Garcia Ducar Paloma; Luis Carro Pedro; Valdovinos Antonio

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2011, 58(12): 892-896.

DOI：10.1109/TCSII.2011.2172524

• Efficiency
• linearity
• load modulation
• power amplifier (PA)
• reconfigurable matching network (RMN)

This brief presents the application of a reconfigurable matching network (RMN) to improve the efficiency of an RF power amplifier (PA) using dynamic load modulation techniques under different antenna mismatch conditions. By changing the RMN state, a near-optimal output impedance is presented to the PA, achieving high efficiency for all input-driven levels. Simulations show efficiency enhancement, while nonlinear distortion can be mitigated using digital predistortion. It will be also shown that under severe mismatch conditions, using an RMN, significant efficiency and linearity improvements can be achieved.

• 出版日期2011-12