RF Engineering

Yagi Antenna Calculator

Estimate Yagi antenna driven element, reflector and director dimensions.

What this tool is for

Estimate Yagi antenna driven element, reflector and director dimensions.

Basic formula

Yagi elements are based on wavelength fractions.

Design notes

Use these values as a starting point. Real RF performance depends on PCB layout, ground plane, enclosure, cable loss, connectors and measurement conditions.

Common mistakes

Common mistakes include ignoring coax loss, poor antenna placement, missing ground plane, wrong impedance and testing too close to objects.

Frequently asked questions

Are RF calculator results exact?

No. RF results are starting estimates and should be verified with measurements.

Why does antenna tuning change in real life?

Nearby objects, ground plane, enclosure and cable routing can shift resonance and radiation pattern.