A highly linear dual-band Doherty power amplifier for femto-cell base stations
A highly linear dual-band Doherty power amplifier for femto-cell base stations
复制标题
用于毫微微小区基站的高线性双频 Doherty 功率放大器
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Bumman Kim
中科院分区：
文献类型：
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作者：
S. Jee;Yunsik Park;Yunsung Cho;Juyeon Lee;Seokhyeon Kim;Bumman Kim
用于毫微微小区基站的功率放大器（PA）应该是高效、线性和小型的。通过设计非对称Doherty PA（DPA）来提高用于放大高峰均功率比（PAPR）信号的效率。采用三阶互调（IM 3）消除方法改善了线性度。对于双波段操作，应用可调谐开关电容器。通过采用GaN MMIC工艺设计DPA，实现了小尺寸。对于2.3 GHz和2.65 GHz的7.2 dB PAPR 10 MHz带宽LTE信号，实现的双频DPA分别提供45.5/41.6%的DE、-35.6/-34.5 dBc的ACLR和15.7/13.2 dB的增益，平均输出功率为35.3/33.7 dBm。
A power amplifier (PA) for a femto-cell base station should be highly efficient, linear and small. The efficiency for amplification of a high peak-to-average power ratio (PAPR) signal is improved by designing an asymmetric Doherty PA (DPA). The linearity is improved by applying third-order inter-modulation (IM3) cancellation method. For dual-band operation, a tunable switched capacitor is applied. A small size is achieved by designing the DPA using GaN MMIC process. The implemented dual-band DPA delivers a DE of 45.5/41.6%, ACLR of -35.6/-34.5 dBc, and a gain of 15.7/13.2 dB with an average output power of 35.3/33.7 dBm, respectively, for a 7.2 dB PAPR 10 MHz bandwidth LTE signal at 2.3 and 2.65 GHz.