Browsing by Autor "Ricardo Colpari Carrizo"

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Approach to Verify Radio Frequency Compatibility on a Satellite Platform
(2018) Pablo Marino Belcaguy; Ricardo Colpari Carrizo
The increasing complexity and the size constraints of smaller designs for aerospace vehicles make the radio frequency compatibility more relevant due to the risk of interference between equipment. This work proposes an approach to verify the Radio Frequency Compatibility between the transmitters and receivers on board of complex autonomous platforms, such as satellites. The proposed approach is applied to a satellite platform designed for a typical Low Earth Orbit mission. First of all, some typical approaches to tackle this problem are mentioned: The modelling of transmitters, receivers, antennas, the modelling of the structure and the estimation of the interference levels with simple formulas or with a solver selection: This is driven by the satellite size and the frequencies, a simulation software such as Altair FEKO® is used for this analysis. The passive intermodulation (PIM) products analysis are also analysed, but first it is necessary to identify all the transmitting frequencies on the satellite, and check if any of the resulting combinations could fall in the frequency band of a receiver, when an intermodulation frequency is identified as risky, the intermodulation power analysis is needed, which will be done with a simplified worst case analysis. The scope of this approach is to calculate the general system margins achieved on selected victim equipment and therefore verify the status of compliance to radiated susceptibility or PIM requirement to ensure radio frequency compatibility.