Analysis and Design Approach for Array Fed Reflector Antenna

Le résumé fourni par la source

This paper proposes an efficient design method for Array Fed Reflector (AFR) antennas utilized in Very High Throughput Satellite (VHTS) systems. AFRs combine reflector antenna high gains with array flexibility to generate multibeam. The design process involves determining the defocus distance, selecting the array arrangement range, and optimizing the number of array elements. The defocus distance is crucial for achieving the desired scanning angle and secondary pattern. Simulation results validate the design approach, with close agreement between expected and simulated gains. Data fitting based on these results offers guidelines for selecting feed spacing, finding that a feed spacing of 1.9λ offers significant gain advantages for moderate array diameters, while a spacing of 1.5λin larger array diameters can reduce system complexity.

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