What this tool is for
Calculate quarter-wave vertical and radial lengths for ground plane antennas.
Basic formula
Radiator length ≈ wavelength / 4.
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.