Antenna Efficiency Calculator

Antenna Efficiency Calculator

Calculate the antenna efficiency using the formula:
\[ \eta = \frac{R_r}{R_r + R_l} \times 100\% \]

* Enter the radiation resistance \( R_r \) (Ω) and loss resistance \( R_l \) (Ω).

Step 1: Enter Parameters

Example: 50 Ω

Example: 10 Ω

Derived Formula: \( \eta = \frac{R_r}{R_r + R_l} \times 100\% \)


Practical Example:
For a radiation resistance \( R_r = 50\,\Omega \) and a loss resistance \( R_l = 10\,\Omega \),
the efficiency is: \( \eta = \frac{50}{50+10} \times 100\% \approx 83.33\% \).