Calculadora de Presupuesto de Enlace Gratis
Calcula el presupuesto de enlace RF sumando ganancias y restando pérdidas desde transmisor a receptor.
Received Power
-63.0 dBm
Received Power vs Transmit Power
Fórmula
## How a Link Budget Works A link budget adds up all gains and subtracts all losses between transmitter and receiver to find the received power. ### Formula **P_rx = P_tx + G_tx + G_rx - L_path - L_misc** **Link Margin = P_rx - Receiver Sensitivity** A positive link margin means the link will work. Engineers typically design for 10-20 dB of margin to account for fading and environmental variation.
Ejemplo Resuelto
30 dBm transmitter, 15 dBi antennas on each end, 120 dB path loss, 3 dB misc losses, receiver sensitivity -90 dBm.
- 01Received power: 30 + 15 + 15 - 120 - 3 = -63 dBm
- 02Link margin: -63 - (-90) = 27 dB
- 03Link is viable with 27 dB margin
Preguntas Frecuentes
What link margin is needed?
Typically 10-20 dB for reliable links. More margin is needed for mobile links, rain-affected paths, or high-reliability requirements.
What are typical cable losses?
Coaxial cable losses depend on frequency and type. At 2.4 GHz, expect 0.5-3 dB loss per meter depending on cable quality.
How do I account for rain fade?
Add an additional rain attenuation factor (2-10 dB depending on frequency and climate) to the path loss.
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