Application Note

Cavity-Based Helical Resonator Bandpass Filters Designed With Parameterized Project Template in NI AWR Software

This application note describes the design process for a low-cost family of ultra high-frequency (UHF) cavity-based helical resonator bandpass filters for a cable television (CATV) component test switched filter bank. Cavity-based filter performance is determined entirely by geometry. Even though the filter structures are tuned, it can be challenging to size all the component geometries such that the tuning elements are effective to meet the desired synthesized response, hence a tool such as NI AWR Design Environment - inclusive of Analyst 3D EM simulator - greatly assists.