Home: Planar PCB Radio Filters

Experiments in Stepped Impedance Bandstop Filters

From Sonnet EM Simulator to Kicad to PCB fab to VNA

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This design uses the reflections at the ends of ~1/4 wavelength long (in terms of the effective dielectric constant) microstrip traces to redirect the energy of a particular frequency to resonator elements (long skinny inductor, fat/wide cap) which then prevent it from flowing through.

Simulation and design

Fabrication and measurement