T/SHQAII 103-2023 Commercial satellite X-band telemetry antenna technical specification

Scope

Scope: This document specifies the requirements for commercial satellite X-band measurement and control antennas, and describes the corresponding test methods, inspection rules, marking, packaging, transportation, and storage requirements. This document is applicable to various X-band measurement and control antennas used in all types of low- and medium-orbit commercial satellites. Main technical content: 1. Appearance and marking: The appearance should be clean, without burrs, rust, dents, scratches, cracks, or deformation. The surface plating and coating should be uniform, without bubbling, cracking, or peeling. The marking should be clear and correct. 2. Weight: The weight of each product should meet the requirements of the product specification. 3. Operating frequency band and bandwidth: The product operates in the X-band. The operating frequency of the measurement and control receiving antenna product should be within the range of 7.2 GHz ± 50 MHz, and the operating frequency of the transmitting antenna product should be within the range of 8.2 GHz ± 200 MHz. The operating bandwidth should be no less than 100 MHz. 4. Standing wave ratio: The standing wave ratio of the product should not exceed 2.0. 5. Polarization form: The measurement and control receiving antenna product is left-hand circular polarization, and the measurement and control transmitting antenna product is right-hand circular polarization. 6. Diagram: The gain and axial ratio indicators of the product should meet the requirements of the product specification. 7. Electrical interface: The product's connector is an SMA-K type RF connector with a characteristic impedance of 50Ω. 8. Mechanical interface: The product is installed and fixed on the satellite using 3 or 4 M2 screws. The mechanical dimensions and installation dimensions of the product should meet the requirements of the product specification, and the installation interface should not deform. 9. Reliability: The reliability of the product

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