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 />
Parabolic Antenna<br />
The gain of a parabolic antenna very often<br />
used in ground stations <strong>and</strong> sometimes also<br />
on satellites is given by:<br />
G a<br />
:= η ⋅<br />
⎛<br />
⎜<br />
⎝<br />
π ⋅D<br />
λ<br />
η (eta) is the socalled aperture efficiency of<br />
the antenna,<br />
⎞<br />
⎟<br />
⎠<br />
D is the diameter of the dish<br />
λ (lambda) is the wavelength of the carrier<br />
2<br />
For good commercial parabolic antennas the efficiency typically falls in the interval:<br />
0.6 ≤ λ≤ 0.7<br />
FH 2001-08-27 Cubesat_<strong>Communication</strong>.ppt<br />
Slide # 5
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