摘要
通过对传输线阻抗特性的分析,提出一种基于λ/8(λ为波长)传输线的新型线性阻抗变换器,这种阻抗变换器能同时在频点f0、频点f0的第一个谐振频点2f0及第二个谐振频点3f0实现阻抗变换,且给出此传输线参数。在阻抗变换K值不超过5时,得到的传输误差|Γ|不超过0.024,可满足大多数工程应用的需要。该文推断结果可推广到n个频点阻抗变换器,即在某一个基本频点f0和其所有不能被n+1整除的谐振频点上同时实现阻抗变换。
A new line impedance transformer operating not only in one frequency f0,but also in the first harmonic 2f0 and the second harmonic 3f0 is presented by analyzing the characteristics of transmission lines and the parameters of the transmission lines are given.If impedance transforms of K is less than 5,transmission errors will less than 0.024,which can meet the need of the majority of engineering application.These results can further be extrapolated to an n-frequency transformer,which can fulfil the same impedance transformation at a fundamental frequency f0 and all harmonics that are not divisible by n＋1.
出处
《压电与声光》
CSCD
北大核心
2011年第6期999-1001,共3页
Piezoelectrics & Acoustooptics
关键词
传输线
谐波分析
变换器
三频
transmission-line
harmonic analysis
transformer
triple-frequency
