| 摘要: |
| 为解决ISM频段小信号放大器降低失配与减小噪声之间的矛盾，提出了一种改善放大
器性能的分析方法，满足信源、晶体管与负载三者之间的失配程度在受限条件下增益和噪声
的最优化。指出增益、驻波比和噪声多个性能参数不能同时达到最优，提出了提高射频放大
器综合性能的方法。在24 GHz的ISM频段进行的仿真结果表明，驻波比越小，增益越
大，噪声系数受失配限制的影响，在满足增益的条件下失配受限会使噪声系数增大。 |
| 关键词: |
| DOI：10.3969/j.issn.1001-893X. |
|
| 基金项目: |
|
| Small Signal Analysis of RF Amplifier at ISM Band |
| HUANG Yu-lan |
| (Department of Electronic and Information Engineering, Xi′an University of Posts and Telecommunications, Xi′an 710121,China) |
| Abstract: |
| To resolve the conflict between decreasing mismatch and diminishing no
ise at ISM band，a method for improving amplifier performance of small signal is
proposed to
implement the optimal gain and noise, satisfying the mismatch limit between sour
ce and transistor as well as between transistor and load termination.It is point
ed out that the parame
ter of gain，VSWR and noise are impossible to be optimal simutaneously.The met
hod for impr
oving the comprehensive performance of RF amplifier is proposed.The amplifier is
simulated at ISM band
of 2.4GHz，and the results show that the smaller the VSWR is,the larger the ga
in is the noise figure is affected by limitation of mismatch， and the limita
tion of mismatch will cause the increasing of noise figure under the target gai
n. |
| Key words: |
《电讯技术》编辑部 