RF Passives
RF Passives
Attenuators, filters, resonators, power dividers, impedance matching networks and directional couplers. Design tools for passive RF components — substrate-aware PCB dimensions included.
LC Filter Design
Butterworth, Chebyshev, Bessel — LP, HP, BP, BS. Component values, schematic and frequency response.
Wilkinson Power Divider
Equal-split, unequal-split and wideband Wilkinson dividers. Substrate-aware — computes exact PCB trace widths and lengths.
Directional Couplers
Directional coupler, branch-line 90° hybrid and rat-race 180° hybrid. Step-by-step design with substrate-aware PCB dimensions.
Non-Ideal R, L, C & SRF ✦
How real components behave at RF — parasitic equivalent circuits, self-resonant frequency, interactive impedance vs frequency plots and design rules.
Impedance Matching
L-network (lumped), quarter-wave transformer and single-stub tuner. Complex source and load impedances. Substrate-aware.
Attenuator Pads
Pi and T pad design — attenuation to resistor values and back. Return loss and power dissipation.
LC Resonator
f0, unloaded Q, loaded Q, bandwidth, coupling coefficient and insertion loss.
Stepped-Z Lowpass Filter
Distributed stepped-impedance LPF — alternating high/low impedance microstrip sections. Substrate-aware widths and lengths. Butterworth/Chebyshev.
Coupled-Line Bandpass Filter
Parallel coupled-line BPF — even/odd mode impedances, trace widths, gaps and physical lengths. Substrate-aware. Minimum gap warning.