OH3CUF

Dipole Antenna Calculator

Select Band: 40m (7.1 MHz) 30m (10.1 MHz) 20m (14.2 MHz) 17m (18.1 MHz) 15m (21.2 MHz) 10m (28.5 MHz) Custom Frequency Installation Style (Shortening Factor): Flat Horizontal Dipole (1.00) Inverted V (~3% shorter) Sloper (~5% shorter) Custom Shortening Factor Wire Material: Copper (1.00) Steel (~2% shorter) Custom Material Factor Installation Height (meters): Calculate * Tip: Higher antennas (at least 0.25λ) perform better! 0.5λ is ideal for DX contacts.