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Link Budget Calculator

Calculate RF link budget with comprehensive transmitter, receiver, and path loss analysis.

Quick Scenarios

Select a preset to auto-populate parameters for common use cases.

Transmitter

Base station transmit power
Transmitter antenna gain
Feeder/cable losses at transmitter
Effective Isotropic Radiated Power
57.50dBm

Receiver

Minimum detectable signal (negative)
Receiver antenna gain
Cable losses at receiver
Effective Receiver Sensitivity
-105.00dBm

Path Loss & Losses

Total path loss between Tx and Rx

Visualizing the Link

A link budget accounts for all the gains and losses from the transmitter, through the medium (free space, cable, waveguide, fiber, etc.) to the receiver in a telecommunication system.

EIRPTx Power + Tx Gain - Tx Losses
Path LossSignal attenuation over distance
Fade MarginRx Power - Rx Sensitivity

Key Formula

PRX = PTX + GTX - LTX - Lfs - Lmisc + GRX - LRX

PRX: Received Power (dBm)

PTX: Transmitter Output Power (dBm)

GTX, GRX: Antenna Gains (dBi)

LTX, LRX: Cable/Connector Losses (dB)

Lfs: Free Space Path Loss (dB)

Lmisc: Miscellaneous Losses (Fade Margin, Body Loss, etc.) (dB)