• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Microwave Theory and Techniques >High-Efficiency GaN Doherty Power Amplifier for 100-MHz LTE-Advanced Application Based on Modified Load Modulation Network
【24h】

High-Efficiency GaN Doherty Power Amplifier for 100-MHz LTE-Advanced Application Based on Modified Load Modulation Network

机译：基于改进的负载调制网络的100MHz LTE高级应用的高效GaN Doherty功率放大器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents a high-efficiency GaN Doherty power amplifier (PA) with 100-MHz instantaneous bandwidth for 3.5-GHz long-term-evolution (LTE)-advanced application. A modified load modulation network, employing an enlarged peaking amplifier to carrier amplifier power ratio and moderately increased load impedance of the carrier amplifier, is proposed for enhancing efficiency and achieving improved load modulation. To increase the power ratio and alleviate the influence of slight impedance mismatch, a proposed load impedance strategy and corresponding stepped-impedance matching network are adopted for high-efficiency and wideband operation. By tuning the carrier offset line, the inconsistency of efficiency, gain, and output power in the operation band can be alleviated. Measurement results show that the Doherty PA has a drain efficiency of approximately 40% with gain fluctuation less than 0.5 dB at 9-dB back-off power, and maximum efficiency of about 60% at saturation in the signal band of 3.4–3.5 GHz. By using the digital pre-distortion (DPD) technique, the Doherty PA achieves adjacent channel leakage ratio of about $-$48 dBc at an average output power of 40.4 dBm with efficiency of 42.5%, when driven by 100-MHz LTE-advanced signal. To the best of the authors' knowledge, this is the first high-performance result of linearization using conventional DPD technique with 100-MHz bandwidth signals for the GaN Doherty PA at 3.5-GHz frequency band thus far.
机译：<？Pub Dtl？>本文提出了一种具有100 MHz瞬时带宽的高效GaN Doherty功率放大器（PA），用于3.5 GHz长期演进（LTE）的高级应用。为了提高效率并实现改进的负载调制，提出了一种改进的负载调制网络，该网络采用增大的峰值放大器与载波放大器的功率比并适当增加载波放大器的负载阻抗。为了提高功率比并减轻轻微的阻抗失配的影响，针对高效率和宽带工作，采用了建议的负载阻抗策略和相应的步进阻抗匹配网络。通过调整载波偏移线，可以缓解工作频带中效率，增益和输出功率的不一致。测量结果表明，Doherty PA的漏极效率约为40％，在9dB的补偿功率下增益波动小于0.5dB，在3.4-3.5GHz的信号频带中饱和时的最大效率约为60％。通过使用数字预失真（DPD）技术，Doherty PA实现了大约 $-$ 48的相邻信道泄漏率。当由100MHz LTE先进信号驱动时，平均输出功率为40.4 dBm时的dBc，效率为42.5％。据作者所知，这是迄今为止使用3.5频段GaN Doherty PA使用100 MHz带宽信号的传统DPD技术进行线性化的第一个高性能结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号