안테나 복사 패턴을 고려한 포물형방정식기법기반레이다 탐지거리분석.

This paper presents a novel approach for analyzing the detection range of radars using the split-step Fourier transform-based parabolic-equation (PE) method, which interprets the boundary conditions as perfect electric conductors. The proposed method overcomes the limitations of conventional PE methods, which primarily employ a Gaussian single-beam pattern, by enabling electro- magnetic-wave-propagation analysis based on the effects of antenna-radiation patterns. To verify that it can appropriately account for the antenna-radiation pattern, the path losses in the elevation-angle directions of the main and side lobes were analyzed and compared with the free-space path loss. Subsequently, the PE method, which accounts for the antenna-radiation pattern, was used to calculate the received power for a target with a specific radar cross-section under free-space and duct situations based on the atmospheric refractive index. The results showed that the proposed method enables an accurate detection-range analysis reflecting the actual operational environment of a radar. Additionally, it can be applied to the PE method based on the actual radar-antenna pattern by considering in- homogeneous atmospheric conditions and the curvature of the Earth. [ABSTRACT FROM AUTHOR]