A Bandwidth Controllable Anti-aliasing Filter Design Method

In order to implement the new functions such as pulse measurement and spectrum analysis in vector network analyzer, it is necessary to improve the sampling rate, passband bandwidth, and other performance indicators of the signal processing system of the vector network analyzer receiver, and the anti-aliasing filter in the sampling circuit is of great importance to realize the above indicators. Therefore, an anti-aliasing filter suitable for high-performance vector network analyzers is designed in this paper, which not only has controllable bandwidth, but also has the advantages of small in-band insertion loss, large bandwidth, strong stop-band suppression, and high flatness in-band. The feasibility of this solution is verified in high performance vector network analyzer.