Designing RF Filters

When to Use

• Designing bandpass filters (coupled-line, hairpin, open-loop, combline, interdigital, SIW)
• Designing lowpass filters (stepped-impedance)
• Designing bandstop or notch filters (spurline, stub-based)
• Extracting coupling matrices from measured S-parameter data (measuredFilter)
• Selecting a filter topology for a given bandwidth, selectivity, or size requirement

When NOT to Use

• Designing transmission lines for impedance control — use matlab-design-pcb-txline
• Designing couplers or splitters — use matlab-design-pcb-coupler
• Designing passive components (inductors, capacitors, baluns) — use matlab-design-pcb-passive
• Setting up substrate or conductor materials — use matlab-manage-pcb-material
• Optimizing filter dimensions after design — use matlab-optimize-pcb-design

Typical Workflow