Design Calculations of End Fed Quarter Wave

Date: 2026-01-13

• Compute wavelength: lambda(m) = 300 / f(MHz).
• Quarter-wave length L0 = lambda / 4.
• Apply velocity factor and end effect: L = L0 * VF * K.
• Counterpoise length ~0.05 to 0.25 lambda.
• Use matching network to reach 50 ohms.