| 一种改善W-CDMA手机用功率放大器线性度的新方法 |
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| 引用本文： | 肖婷婷,周东平. 一种改善W-CDMA手机用功率放大器线性度的新方法[J]. 中国集成电路, 2007, 16(12): 51-58 |
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| 作者姓名： | 肖婷婷 周东平 |
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| 作者单位： | 公安部第一研究所 |
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| 摘 要： | 分析了偶次交调产生的低频因素对临近信道泄漏功率比(ACPR)不对称性的影响;根据实际功率放大器结构提出了一种等效低通滤波器模型;仿真验证了该低通滤波器的带宽和阶数对ACPR不对称性的影响;测试中通过改变该低通滤波器的带宽和阶数,使得ACPR不对称性改善了3.72dB,同时ACPR降低了2.95dB,有效地改善了功率放大器的线性度。
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| 关 键 词： | 线性度 ACPR不对称性 低频因素 |
A New Method to Improve the Linearity of Power Amplifiers used for W-CDMA Handsets |
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| Xiao Ting-ting,Zhou Dong-ping. A New Method to Improve the Linearity of Power Amplifiers used for W-CDMA Handsets[J]. China Integrated Circuit, 2007, 16(12): 51-58 |
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| Authors: | Xiao Ting-ting Zhou Dong-ping |
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| Affiliation: | The First Research Institute of Ministry of Public Security |
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| Abstract: | The influence of low frequency factors created by the even order distortion to the adjacent channel power ratio (ACPR) asymmetry is analyzed. An equivalent low pass filter model is presented according to the actual power amplifier structure. We simulated and confirmed the influences of the band and order of the low pass filter to the ACPR asymmetry. In the test, the ACPR asymmetry was improved by 3.72dB and the ACPR was decreased by 2.95dB through changing the band and order of the low pass filter. The linearity of power amplifier was improved effectively. |
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| Keywords: | W-CDMA |
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