Antenna for GNSS Reception in GEO-Orbit
There are a number of global navigation satellite systems (GNSS), in use or planed,
which are used for navigation on earth but also for autonomous navigation of satellites
in low earth orbit (LEO). It would be desirable to also have autonomous navigation in
geosynchronous earth orbit (GEO) to reduce costs and make it possible to get higher
accuracy on the position of the satellite. One part of the navigation system is the
GNSS antenna which is examined in this master thesis.
The specifications of the antenna were first decided and then three antenna
alternatives were investigated in greater detail: a monofilar helix antenna, a three
element circular array antenna and a twelve element circular array antenna. The result
was that they would all work as a GNSS antenna in GEO but none could be judged to
be the best under all circumstances. The size requirement for the mission and the used
GNSS receiver would primarily decide which fits the mission best.
AT THIS PAGE YOU CAN DOWNLOAD THE WHOLE ESSAY. (follow the link to the next page)