This converter determines the effective aperture (Ae) of an antenna using its gain and operating frequency. It helps evaluate how efficiently an antenna can capture power from an incoming electromagnetic wave.
Formula
Ae = (λ² / (4 * π)) * G = (c² / f²) * (G / (4 * π))
Formula Explanation
- Ae is the antenna’s effective area in square meters (m²).
- λ is the wavelength (m), calculated as c / f.
- c is the speed of light (2.998 × 10⁸ m/s).
- G is the antenna gain in linear scale (not dB).
Example
Input: f = 120 MHz, G = 11 dBi → 10^(11/10) = 12.589
Result: Ae = 6.25 m²
Who uses it
Helpful for RF designers and antenna engineers to estimate received power, evaluate link performance, and understand antenna efficiency.