| Title |
Atmospheric Effect on Radar Wave Propagation in AESA Radar Applications |
| Authors |
임태흥(Tae Heung Lim) ; 왕성식(Sungsik Wang) ; 고진원(Jinwon Ko) ; 고민호(Minho Go) ; 서철헌(ChulHun Seo) ; 추호성(Hosung Choo) |
| DOI |
https://doi.org/10.5573/ieie.2019.56.1.11 |
| Abstract |
In this paper, we analyzed the radar wave propagation characteristics for air-to-air AESA radars and calculated the path loss for estimating target detection performance using Advanced Refractive Effects Prediction System (AREPS) simulation software. Four atmospheric scenarios of normal, surface duct, elevated duct, and combined atmospheric conditions were set up by using the trilinear modified refractivity model, including the terrain data of the urban area of Korea. In addition, we applied the radiation pattern of the AESA radar array antenna with HPBW of 4.4° and SLL of 35.7 dB in zx-plane to the path loss simulations with four atmospheric scenarios. When AESA radar located at a height of 5000 m is steered to the bore-sight direction, the path loss of 171 dB is obtained at a distance of 150 km in the combined atmospheric condition, which indicates that the target detection performance in the bore-sight direction may be degraded. In the combined atmospheric condition, the path losses according to the variation of the trap height and thickness were obtained when the target was located at the height of 5000 m. It is found that the target detection performance is drastically deteriorated when the height h2 resides between 4800 m and 5200 m, where the trap height is similar to the AESA radar altitude. |