Multi-level LINC transmitter with non-isolated power combiner

作者：Hur J^*; Kim H; Lee O; Woo S; Kim K; Kim W; Lee C H; Lim K; Laskar J

来源：Electronics Letters, 2013, 49(25): 1624-1625.

DOI：10.1049/el.2013.3117

• amplification
• OFDM modulation
• power amplifiers
• signal processing
• multilevel LINC transmitter
• nonisolated power combiner
• wasted power
• out phased signal
• power amplifier
• multipower mode
• load modulation
• linear amplification using the nonlinear component
• LINC
• orthogonal frequency division multiplexing signal
• power supplies

By using a non-isolated power combiner, the overall power efficiency can be improved by reducing the wasted power at the combined out-phased signal. To further improve the efficiency of the low-power mode, a multi-power mode out-phasing power amplifier (PA) is proposed with load modulation by switches. Compared with the conventional linear amplification using nonlinear component (LINC) transmitter, the proposed multi-level LINC improves the power-added-efficiency more than 40% for a 7 dB peak-to-average power ratio orthogonal frequency division multiplexing signal. To the authors%26apos; knowledge, the proposed LINC PA is the first multi-level LINC PA without multiple power supplies.

• 出版日期2013-12-5