Abstract
This paper presents the study of microstrip antenna arrays for
meteorological nano-satellites that are under development in the frame
of UNIESPACO programme, which is supported by the Brazilian Space Agency
(AEB). The main goal of such satellites is to serve as data relay for
transmission of meteorological data collected by stations deployed in
remote areas, such as in the rain forest, whereby no wired communication
is possible. Arrays composed of linearly and circularly polarized
microstrip antennas are investigated. The performance of such arrays is
assessed including parameter variations, especially for the case of
dielectric constant of the antenna substrate and misalignment in the
orientation of the array elements. Such imperfections can occur due to
mechanical stress and large temperature variations that are typical to
the space environment. The antennas were modeled with the
electromagnetic simulator Ansys HFSS. Good results have been observed in
terms of the axial ratio, impedance bandwidth and gain for both of the
proposed models.
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