RF Calculator

Quarter Wave Antenna Calculator

Calculate quarter-wave antenna length for LoRa, WiFi, telemetry and RF projects.

Quarter Wave Antenna Calculator Formula

L = c / (4 x f) x VF

Useful for LoRa, WiFi, FPV, telemetry, SDR, ham radio, drones and RF PCB design.

RF design note

Real RF performance depends on antenna environment, ground plane, matching, cable loss, PCB layout and regulations.

Result will appear here.