Ham Radio Impedance Matching Calculators
Nine impedance matching calculators for amateur radio: L-network, T-network, pi-network, gamma match, hairpin match, balun and UNUN turns, Smith chart position, quarter-wave transformer, and series/shunt capacitor matching.
L-Network Impedance Matching Calculator
Component values for a two-element L-network matching any source to any load impedance. Gives both high-pass and low-pass solutions.
T-Network (Pi-T) Matching Calculator
Three-element T-network matching calculator with adjustable Q factor. Higher Q gives better harmonic rejection but narrower bandwidth.
Pi-Network Matching Calculator
Classic pi-network for PA output matching and antenna tuners. Calculates all three component values from impedances and Q.
Gamma Match Calculator
Gamma rod length, gamma rod spacing, and series capacitor value for a driven-element gamma match on a Yagi or other antenna.
Hairpin (Beta) Match Calculator
Hairpin stub length and width for a shunt inductance match on a Yagi driven element. Requires a split driven element.
Balun and UNUN Turns Calculator
Number of turns for a ferrite-core balun or UNUN for a target impedance transformation ratio and frequency. Covers 1:1, 4:1, 9:1, 16:1, and 49:1 ratios.
Smith Chart Normalised Impedance Calculator
Normalised impedance, reflection coefficient magnitude and angle, SWR, return loss, and approximate Smith chart coordinates from a complex impedance.
Quarter-Wave Coax Transformer Calculator
Required coax impedance and physical length for a quarter-wave transformer between two impedances. Includes nearest standard coax options.
Series and Shunt Capacitor Matching Calculator
Single reactive element matching: series capacitor or shunt capacitor value to transform one resistive impedance to another at a given frequency.