论文部分内容阅读
对传统短截线超宽带滤波器作了改进:首先,各短路短截线的长度不限定为1/4波长,且互相之间有差异,这就使得原本集中于2f0的N个传输零点在一定阻带范围内分散并优化分布;其次,在每个1/4波长连接传输线的中点位置加载一定长度和特性阻抗的开路短截线,从而在高频阻带范围内产生了若干新的传输零点。通过软件优化,高频阻带出现了等波纹抑制特性。该方案使得短截线滤波器的通带高端锐截止,且高频阻带的带宽变宽。实测结果证明了该方法的有效性。
The traditional stub ultra-wideband filter has been improved: First, the length of the short stub is not limited to 1/4 wavelength, and there are differences between each other, which makes the original focus on 2f0 N transmission zero in A certain range of stopband dispersion and optimization of distribution; Second, the mid-point of each 1/4 wavelength connection transmission line loaded with a certain length and characteristic impedance of the open stub, resulting in a number of new high-frequency stopband range Transfer zero point. Through the software optimization, high-frequency stop band appeared ripple suppression features. The scheme makes the passband of the stub filter cut off sharply at the high end and widens the bandwidth of the high-frequency stop band. The results show that the method is effective.