发表机构
Department of National Defence, Defence Research and Development Canada（加拿大国防部国防研究与开发局）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文利用Lorenz-Mie理论严格分析PEC球体的前向散射双基地RCS，量化其对双基地角偏离的敏感性并分解极化通道，建立物理透明的基准。
AI 中文摘要
前向散射雷达（FSR）代表了一种极端的双基地配置，其中发射机-目标-接收机几何结构接近共线，导致双基地角接近180°。在这种机制下，衍射主导的散射可以产生显著超过单基地对应值的双基地雷达截面（RCS），这一特性支撑了前向散射和被动双基地雷达概念。本文利用精确的Lorenz-Mie理论，对完美导电（PEC）球体的双基地RCS进行了严格的电磁学研究。分析解决了两个实际目标：（i）量化前向散射增强对偏离理想180°双基地角的敏感性，作为电尺寸的函数；（ii）将前向散射响应分解为典型的Lorenz-Mie极化通道S1和S2，从而建立极化分辨基准。然而，结果由无量纲尺寸参数ka控制，因此可直接推广到其他频率和双基地配置。通过将全波模拟结果明确地与基于Babinet的前向散射缩放和高频极限下的光学定理解释联系起来，本文为前向散射和被动双基地雷达分析提供了物理透明的基准。
英文摘要
Forward-scatter radar (FSR) represents an extreme bistatic configuration in which the transmitter--target--receiver geometry approaches collinearity, yielding a bistatic angle near $180^\circ$. In this regime, diffraction-dominated scattering can produce bistatic radar cross sections (RCS) that substantially exceed their monostatic counterparts, a property that underpins FS and passive bistatic radar concepts. This paper presents a rigorous electromagnetic study of the bistatic RCS of a perfectly electrically conducting (PEC) sphere using exact Lorenz--Mie theory. The analysis addresses two practical objectives: (i) quantifying the sensitivity of FS enhancement to deviations from the ideal $180^\circ$ bistatic angle as a function of electrical size, and (ii) decomposing the FS response into the canonical Lorenz--Mie polarization channels $S_1$ and $S_2$, thereby establishing a polarization-resolved benchmark. The results, however, are governed by the dimensionless size parameter $ka$ and therefore generalize directly to other frequencies and bistatic configurations. By explicitly relating full-wave simulation results to Babinet-based FS scaling and optical-theorem interpretations in the high-frequency limit, the paper provides a physically transparent benchmark for FS and passive bistatic radar analysis.
