Chapter 3: Tables for calculating link budget
Posted by Mungo under Chapter 3 on March 21st, 2007.To calculate the link budget, simply approximate your link distance, then fill in the following tables:
Free Space Path Loss at 2.4GHz
|
Distance (m) |
100 |
500 |
1,000 |
3,000 |
5,000 |
10,000 |
|
Loss (dB) |
80 |
94 |
100 |
110 |
113 |
120 |
Antenna Gain:
|
Radio 1 Antenna (dBi) |
+ Radio 2 Antenna (dBi) |
= Total Antenna Gain |
|
_ |
_ |
_ |
Losses:
|
Radio 1 + Cable Loss (dB) |
Radio 2 + Cable Loss (dB) |
Free Space Path Loss (dB) |
= Total Loss (dB) |
|
_ |
_ |
_ |
_ |
Link Budget for Radio 1 -> Radio 2:
|
Radio 1 TX Power |
+ Antenna Gain |
- Total Loss |
= Signal |
> Radio 2 Sensitivity |
|
_ |
_ |
_ |
_ |
_ |
Link Budget for Radio 2 -> Radio 1:
|
Radio 2 TX Power |
+ Antenna Gain |
- Total Loss |
= Signal |
> Radio 1 Sensitivity |
|
_ |
_ |
_ |
_ |
_ |
If the received signal is greater than the minimum received signal strength in both directions of the link, then the link is feasible.
