In my last post Designing and Fabricating a Microwave Microstripline Filter: From HFSS Simulation to PCB Testing, I designed, simulated and manufactured a Interdigital microstrip bandpass filter for the 5.5 GHz microwave band. One common issue with microwave filters designed for a specific frequency is the presence of spurious out-of-band responses, often occurring at harmonic frequencies...
Microstripline filters are essential components in RF and microwave circuits, offering a compact and efficient way to shape frequency response. In this post, we’ll walk through the complete process of designing, simulating, fabricating, and testing a microstripline filter. Starting with electromagnetic simulations in Ansys HFSS, we’ll validate the design before exporting it to KiCad for PCB...