| 用于CDMA2000的射频功率放大器仿真实现 |
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| 引用本文： | 付超,孙玲玲,文进才.用于CDMA2000的射频功率放大器仿真实现[J].杭州电子科技大学学报,2006,26(5):9-12. |
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| 作者姓名： | 付超 孙玲玲 文进才 |
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| 作者单位： | 杭州电子科技大学CAD所,浙江,杭州,310018 |
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| 基金项目： | 浙江省国际科技合作计划;浙江省科技计划 |
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| 摘 要： | 该文给出了一个适用于CMDA2000系统的射频功率放大器单片集成电路的实现。放大器采用了具有高线性度、高增益和高效率的砷化镓异质结双极型晶体管，包括驱动级和功率级两级。为了同时实现CDMA2000系统所要求的最大输出功率时的良好线性度和改善中等输出功率时的效率，使功率放大器工作在近乙类，并采用了自适应性无源基极电阻偏置技术来抑制由于近乙类工作造成的增益失真。考虑了寄生效应的后仿真结果表明。该功率放大器在1850MHz。码片速率为1．2288Mcps的混合移相键控调制信号的激励下，在CDMA2000系统要求的最大输出功率28dBm处PAE达到44．8％，增益为27．4dB，偏离中心频率1．25MHz处的ACPR为-47．9dBc。
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| 关 键 词： | 功率放大器 异质结 自适应 |
| 文章编号： | 1001-9146（2006）05-0009-04 |
| 收稿时间： | 2006-09-30 |
| 修稿时间： | 2006-09-30 |
Simulative Implementation of RF Power Amplifier for CDMA2000 |
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| FU Chao,SUN Ling-ling,Wen Jin-cai.Simulative Implementation of RF Power Amplifier for CDMA2000[J].Journal of Hangzhou Dianzi University,2006,26(5):9-12. |
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| Authors: | FU Chao SUN Ling-ling Wen Jin-cai |
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| Affiliation: | Institute of CAD, Hangzhou Dianzi Unversity , Hangzhou Zhejiang 310018, China |
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| Abstract: | In this paper, a simulative power amplifier MMIC for CDMA2000 cellular phone systems is developed. Power amplifiers for CDMA2000 systems are required to operate at high efficiency and high linearity over a wide range of output power levels. To obtain high efficiency at low output power and obtain a high linearity at the maxi- mum out power, near- class- B operation is chosen and the gain distortion resulting from near - class - B operation is suppressed by using an adaptive biasing technique. Post simulation shows the PA exhibited a power- added efficiency of 44.8%, a gain of 27.4 dB, and an adjacent channel leakage power ratio at a 1.25 - MHz offset frequency of - 47.9 dBc at a out of 28 dBm with 1,228 8 - Mcps HPSK modulation. |
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| Keywords: | power amplifier HBT adaptive |
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