CAJ | 학술논문

这里首先简单介绍了低噪声放大器(LNA)电路的设计理论,然后介绍了数字对讲机中LNA的设计指标.基于这些指标,使用了HP公司提供的芯片AT-41511,详细阐述了基于ADS仿真的适用于数字对讲机中LNA的主要设计步骤.最后在ADS仿真软件下通过S参数及谐波平衡仿真得到设计出的LNA的各项性能参数,在400~470 MHz频率范围内噪声系数小于0.8 dB,带内增益大于15 dB.仿真结果表明,该设计的LNA可以完全满足所给的性能指标要求.
저리수선간단개소료저조성방대기(LNA)전로적설계이론,연후개소료수자대강궤중LNA적설계지표.기우저사지표,사용료HP공사제공적심편AT-41511,상세천술료기우ADS방진적괄용우수자대강궤중LNA적주요설계보취.최후재ADS방진연건하통과S삼수급해파평형방진득도설계출적LNA적각항성능삼수,재400~470 MHz빈솔범위내조성계수소우0.8 dB,대내증익대우15 dB.방진결과표명,해설계적LNA가이완전만족소급적성능지표요구.
@@@@The designing theory of LNA is described first, then the design index of low noise amplifier in digital walkie presented. Based on these indexes and with AT-41511 from HP company, LNA in digital walkie based on ADS simulation is designed, and the main design procedures are also explained. Finally, from the simulation on S parameters and harmonic balance, the performance indexes of the designed LNA are obtained, and the noise figure is less than 0.8 dB, and in-band gain more than 15 dB in the frequency range of 400~470 MHz. The simulation result shows that the design could meet the performance requirement.