The most part of calculating time in the traditional ray trace method is on the intersect judgment, so upgrading on this process is the key to improve the main calculating efficiency. A new technique named shortcut method was presented based on the fact that most nearby rays took a same reflection trace. So one ray was really calculated and its trace called shortcut was recorded as the reference to give direction to other rays next to it. The overwhelming search for the intersect point was avoided and the number of the really calculated rays was reduced a lot. By programming examination, the optimization arithmetic is proved to be fairly precise, remarkably efficient, and also practical.
Pathak P H, Burkholder R J. Modal, ray and beam techniques for analyzing the EM scattering by open-ended waveguide cavities[J].IEEE Transactions on Antennas and Propagation.1989,37(5):635-647
Ling Hao, Chou Richee, Lee Shungwu. Shooting and bouncing rays:calculating the RCS of an arbitrarily shaped cavity[J].IEEE Transactions on Antennas and Propagation.1989,37(2):194-205
Ling Hao, Lee Shungwu, Chou Richee. High frequency RCS of open cavities with rectangular and circular cross sections[J].IEEE Transactions on Antennas and Propagation.1989,37(5):648-654
����. ��ת������ַ������β��ƽβ��ϵ�RCS[J]. ������,1994(3):1~9 Ma Dongli. Calculation the coupling RCS of empennages by a method of rotating aperture integral method[J]. Stealth Technology, 1994(3):1~9(in Chinese)
Antonio García-Pino, Fernando Obelleíro, José Luis Rodríguez. Scattering from conducting open cavities by generalized ray expansion(GRE) [J].IEEE Transactions on Antennas and Propagation.1993,41(7):989-992
Son H W, Myung N H. A deterministic ray tube method for microcellular wave propagation prediction model[J].IEEE Transactions on Antennas and Propagation.1999,47(8):1344-1350
Bhalla Rajan, Ling Hao. A fast algorithm for signature prediction and image formation using the shooting and bouncing ray technique[J].IEEE Transactions on Antennas and Propagation.1995,43(7):727-731