DTU Satellite Systems and Design Course CubeSat Communication
DTU Satellite Systems and Design Course CubeSat Communication
DTU Satellite Systems and Design Course CubeSat Communication
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Danish Space Research Institute<br />
Danish Small <strong>Satellite</strong> Programme<br />
Link Budget - 1<br />
Fundamentals<br />
The link budget is the foundation for designing any radio link, regardless if is<br />
terrestrial or in space.<br />
The above considerations are gathered into a single equation that expresses the<br />
relationship between the tramsmitter power <strong>and</strong> the power at the output terminals of<br />
the receivning antenna, collecting the power P r = S⋅A r<br />
P r<br />
=<br />
=<br />
Gt ⋅Pt<br />
4⋅ π d 2<br />
⋅<br />
⎛<br />
⎜<br />
⎝<br />
λ<br />
4 ⋅π ⋅d<br />
⋅Ar<br />
⎞<br />
⎟<br />
⎠<br />
2<br />
=<br />
Gt ⋅P<br />
t<br />
4 ⋅ π d 2<br />
⋅<br />
⋅P t ⋅G t ⋅G<br />
r<br />
FH 2001-08-27 Cubesat_<strong>Communication</strong>.ppt<br />
λ 2<br />
⋅ ⋅ Gr =<br />
4 ⋅π<br />
⎛<br />
⎜<br />
⎝<br />
c<br />
4⋅ π ⋅d ⋅f<br />
⎞<br />
⎟<br />
⎠<br />
2<br />
⋅Pt ⋅Gt ⋅Gr<br />
Slide # 6
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