Antenna

SWR & Return Loss Calculator

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Illustration of a ham radio SWR meter, coax cable, and forward and reflected power arrows for return loss calculation

Ham Radio Tools SWR & Return Loss Calculator Convert between SWR, return loss, reflection coefficient, reflected power ratio, and mismatch loss. Add forward power when you want reflected watts and net power at the measurement point. SWR and reflected power diagram A transmitter sends forward power through a feedline to an antenna, with a smaller … Read more

Antenna Length Calculator

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Coiled copper wire beside an antenna analyzer with the title Antenna Length Calculator

Ham Radio Tools Antenna Length Calculator Estimate starting lengths for common ham radio antennas from frequency. Calculate half-wave dipoles, quarter-wave verticals, full-wave loops, end-fed half-wave wires, 5/8-wave verticals, and custom wavelength fractions in feet and meters. Wire antenna length diagram A simple ham radio antenna diagram showing a center-fed dipole, a vertical antenna, and radio … Read more