« Back to Category: Feedlines and Antenna Systems Random (Basic) Next in Category »
If you made a half-wavelength vertical antenna for 223 MHz, approximately how long would it be?
67 cm (26.4 in)
Half-wavelength L (m) ≈ 150 / f(MHz) * velocity_factor. Or refine the quarter-wave: L_quarter ≈ 71.5 / 223 ≈ 0.32m. L_half ≈ 2 * L_quarter ≈ 0.64m = 64cm. Using the feet formula: L_half (ft) ≈ 468 / 223 MHz ≈ 2.1 ft. 2.1 ft * 12 in/ft ≈ 25.2 in. Answer 67cm / 26.4in is closest.
Warning: Generated by AI