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Received Power Calculator App

Received Power Formula:

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

Watts (W)
meters (m)
meters (m)

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1. What is a Received Power Calculator?

Definition: This calculator estimates the power received by an antenna based on the Friis transmission equation.

Purpose: It helps radio engineers and communication specialists determine the signal strength at a receiver.

2. How Does the Calculator Work?

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 describes how much power is received by an antenna from another antenna some distance away.

3. Importance of Received Power Calculation

Details: Accurate received power estimation is crucial for designing reliable communication systems, determining coverage areas, and ensuring proper signal strength.

4. Using the Calculator

Tips: Enter all parameters in the specified units. Default gains of 1 represent isotropic antennas. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are typical values for antenna gains?
A: Gains typically range from 1 (isotropic) to 10+ for directional antennas (values are linear, not in dB).

Q2: How do I convert frequency to wavelength?
A: Use 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 losses?
A: No, this is the ideal case. Additional losses (atmospheric, cable, etc.) would reduce received power.

Q4: What's the practical range for this calculation?
A: It works best for free-space conditions (no obstructions) and far-field distances (d ≫ λ).

Q5: How can I convert the result to dBm?
A: dBm = 10 × log₁₀(P_r × 1000). 1 Watt = 30 dBm.

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