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🔥 Content Introduction
In satellite communication systems (such as High Throughput Satellites (HTS), Low Earth Orbit (LEO) satellite constellations, and satellite IoT), antennas serve as the core hub connecting ground terminals and satellites, with their performance directly determining the communication link’s “coverage area, transmission rate, and anti-interference capability.” Traditional single antennas (like parabolic antennas) have a simple structure but face bottlenecks such as “fixed beam, limited gain, and weak anti-interference” — for instance, a single parabolic antenna cannot simultaneously cover multiple regional users and is easily affected by ground interference or adjacent satellite interference. In contrast, array antennas (composed of multiple antenna elements arranged in a specific pattern) can achieve “high directional gain, dynamic beamforming, and simultaneous multi-beam coverage” through “element signal phase/amplitude control,” perfectly adapting to the needs of satellite communication for “long-distance transmission (36,000 km synchronous orbit GEO), wide area coverage, and complex interference environments.” This article will systematically explain the architecture design, key technologies, performance indicators, and typical applications of array antennas, providing technical references for antenna scheme design in satellite communication systems.
⛳️ Operating Results
📣 Sample Code
function delta_f = doppler_shift ( c, v_t, f, theta )
delta_f = + v_t * sind( theta ) / c * f;
end
🔗 References
[1] Duan Xiaxia, Zhang Jingang, Liu Yanming. Genetic Algorithm for Beamforming Array Antennas and MATLAB Implementation [J]. Modern Electronic Technology, 2007, 30(15):3. DOI:10.3969/j.issn.1004-373X.2007.15.018.
🎈 Some theoretical references are from online literature; if there is any infringement, please contact the author for removal.
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