摘要
针对L频段低谐波失真功率放大器的设计,进行线性与非线性电路分析仿真和电路的优化设计.从理论上分析了甲乙类功率放大器的谐波失真特性,通过采用具有抑制谐波特性的输出匹配电路以降低功放产生的谐波失真.测试得到电路的关键技术指标为:工作频率范围1390～1 510 MHz, 增益35 dB, 1 dB压缩点33 dBm, 并获得了满意的谐波抑制指标,在1 480 MHz、输出功率33 dBm时,二、三次谐波分别为-70 dBc和-63 dBc.结果表明在功放设计中,优化设计输出匹配电路可以有效抑制功放的谐波失真.
To design an L -band low harmonics distortion power amplifier, this paper simulates and optimizes linear and nonlinear circuits. It analyzes the characteristics of class AB power amplifier in theory. The harmonics distortion is lowered by using low -pass output matching circuits. After testing, the key performances includes l dB compression point of 33dBm, frequency band of 1400- 1500MHz, gain of 35dB. Good harmonic suppression performance is obtained： at 1480MHz and output power of 33dBm, the second and third harmonics are as low as -70dBc and -63dBc. It shows that the harmonics distortion can be effectively suppressed by optimizing output matching circuits.
出处
《电讯技术》
2005年第5期92-95,共4页
Telecommunication Engineering
关键词
数字移动通信
射频功率放大器
谐波失真
谐波抑制
输出匹配电路
Digital mobile communication
RF power amplifier
Harmonics distortion
Hormonics suppression
Output matching circuits
