Received Power Calculator for Windows

Received Power Formula:

\[ P_r = P_t \times G_t \times G_r \times \left(\frac{\lambda}{4 \pi d}\right)^2 \]

Transmitted Power (P_t):

Watts (W)

Transmitter Gain (G_t):

Receiver Gain (G_r):

Wavelength (λ):

meters (m)

Distance (d):

meters (m)

Received Power (P_r):

Definition: This calculator estimates the received power in a wireless communication system using the Friis transmission equation.

Purpose: It helps engineers and technicians determine the signal strength at a receiver based on transmission parameters.

The calculator uses the Friis transmission equation:

\[ P_r = P_t \times G_t \times G_r \times \left(\frac{\lambda}{4 \pi d}\right)^2 \]

Where:

Explanation: The equation calculates how much power is received at a distance, accounting for antenna gains and free space path loss.

Details: Accurate received power estimation is crucial for designing reliable wireless communication systems and determining coverage areas.

Tips: Enter all parameters in the specified units. Default gains are 1 (for isotropic antennas). All values must be > 0.

Q1: How do I convert between dB and linear gain values?
A: Linear gain = 10^(dB value/10). For example, 3 dB gain = 10^(3/10) ≈ 2.

Q2: What's the relationship between frequency and wavelength?
A: λ = c/f, where c is speed of light (3×10⁸ m/s) and f is frequency in Hz.

Q3: Does this account for real-world obstacles?
A: No, this is free-space path loss only. Real-world systems experience additional losses.

Q4: What's a typical transmitter power for WiFi?
A: Typically 0.1W (100mW) for consumer routers, up to 1W for enterprise equipment.

Q5: How does distance affect received power?
A: Received power decreases with the square of the distance (inverse square law).