A Novel Triangular Ray Tube Tracing (TRTT) Approach for High-Frequency Radar Cross-Section (RCS) Computation

Electromagnetic scattering analysis is inherently complex and plays a crucial role in both civilian and military applications. A primary objective in analyzing scattering problems is to achieve accurate results while minimizing computational cost. In this study, a novel high-frequency technique, called Triangular Ray Tube Tracing (TRTT), is proposed for calculating the Radar Cross-Section (RCS) of electrically large objects. Unlike conventional ray-based methods, TRTT employs triangular ray tubes (TRTs) with frequency-independent resolution, which significantly reduces the computational burden while maintaining accuracy. The method also accounts for multiple reflections and shadowing effects based on the geometry of the target. To validate the approach, computational steps and results obtained using TRTT are compared in detail with the classical Shooting and Bouncing Ray (SBR) method, which requires frequency-dependent ray density. The proposed method demonstrates substantial advantages in terms of efficiency, scalability, and frequency-independence, particularly for electrically large targets.