Multi-Beam Reflector Antenna System Combining Beam Hopping and Size Reduction of Effectively Used Spots


This paper describes a concept combining beam hopping and size reduction of effectively used spots that may be implemented on multiple-beam antennas to improve their performance, specifically the carrier-to-interference ratio, the minimum directivity, and the roll-off. The expected impact on antenna RF performance is demonstrated primarily based on simplified models. A more-realistic focal-array-fed reflector antenna is additionally presented, primarily based on a cell-reuse theme of twelve reduced to four (one-third of the coverage receiving all the offered bandwidth according to a cell-reuse scheme of four at a given instant), with performance in line with the simplified model. This specific style enabled improving the antenna's performance while not drastically increasing its complexity: the minimum directivity and C/I were respectively one.sixty seven dB and 3.sixty five dB higher when put next to a traditional antenna implementation with a cell-reuse scheme of four.

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