In order to ensure the electromagnetic compatibility of civil light and small UAV systems and meet the requirements of relevant standards and specifications, the GB T 38909-2020 standard specifies specific electromagnetic compatibility requirements and test methods.
First of all, the standard requires that the transmitting equipment of the UAV system should comply with relevant regulations in terms of transmission frequency, power, modulation mode and spurious emissions. At the same time, the receiving equipment should have anti-interference capabilities and good selectivity to ensure that the UAV system can work normally in a complex electromagnetic environment.
Secondly, the standard also specifies the methods for testing electromagnetic radiation, including the radiated disturbance field strength test and the radiated immunity test. The Radiation Disturbance Field Strength Test is used to measure the radiation disturbance field strength of an unmanned aerial system at different distances and directions to ensure that it meets the relevant limit requirements. The radiated immunity test is used to evaluate the performance of the UAV system when exposed to electromagnetic interference and verify whether it has good immunity to interference.
In addition, the standard specifies the electromagnetic compatibility requirements that the communication system between the ground control station and the UAV should have. The communication system should be able to operate within the specified frequency range and meet the requirements for communication performance and electromagnetic compatibility.
In conclusion, the implementation of the GB T 38909-2020 standard will help improve the electromagnetic compatibility of civil light and small UAV systems, and ensure their reliability and safety in various complex environments. In the future, with the continuous development of UAV technology, electromagnetic compatibility requirements and test methods need to be continuously updated and improved to adapt to new application scenarios and market demand.