WCSE

Analysis on Relationship Between Signal Intensity and Antenna Height of Localizer Antenna Array by Digital Twin

Abstract— To obtain optimized space radiation signal to satisfy the coverage requirement, it is essential to set the height of radiated antenna (ha) effectively. Theoretical analysis with a series ha (from 1m to 20 m) of mirror signal synthesis was studied. The three-dimensional mathematical model of localizer antenna array of 7216A was also established. Because of synthesis lobe effect, the variety of ha can adjust the signal strength in vertical. The radio frequency (RF) level would increase obviously with ascending of ha. This phenomenon presents extremely regularly in low altitude. Two curve surface models, conical surface and contour plane, with a series of height of antenna (ha= 1 m, 2 m, 3m, 4m, 5m, 10 m, 15 m, 20 m) and three fly height (hfly= 100 m, 600 m, 3000 m) were analyzed. With the excessively increasing of ha, however, RF value would fluctuate in large elevation. At the same time, headspace blind area combines with circle effect become obvious. The study showed ha rose to 4 meter presents a good quality. This result fits for any localizer antenna array of Instrument Landing System (ILS).

Index Terms—mirror signal synthesis, horizontal polarization, signal strength, antenna height

C. Q. Qu
East China Regional Air Traffic Management Bureau of Civil Aviation of China, CAAC, Shanghai 200335, CHINA

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Cite:C. Q. Qu, "Analysis on Relationship Between Signal Intensity and Antenna Height of Localizer Antenna Array by Digital Twin, " Proceedings of 2022 the 12th International Workshop on Computer Science and Engineering (WCSE 2022), pp. 347-357, June 24-27, 2022.