A GPS antenna filters, amplifies, and down-converts incoming GPS signals into electrical signals that can be read and processed by the electronic receiver within the RF section. A basic GPS antenna consists of an omidirectional antenna element, an antenna preamplifier, and a groundplane. Rugged and simple in construction, it has a good grain and pattern coverage, and a stable electronic phase center that is resistant to multipaths.
Signal: Choose a GPS antenna that can pick up and discriminate very weak signals. The signals should approximately be the same as those in geostationary TV satellites.
Gain pattern: Choose a GPS antenna with a gain pattern that can enhance the ability of the RF section to filter low elevation signals and multipaths.
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