Research On Large Wavelength Aperture-Curved FSS Radome And Program For Its Electrical Property Analysis

This paper combines Ray technique and and Surface Integration Method to calculate electric property parameters of large wavelength curved FSS radome and completes a Fortran program for quick and relatively accurate analysis of large wavelength aperture-curved FSS radome system.This paper has two main shinning points. First, A based-on-dichotomy Ray Tracing algorithm which advantages in its simplicity, accuracy and being adaptive for various kinds of radome is presented to evolve Ray Technique. The modified algorithm is especially advantageous when used to solve superspheroids radome's tracing problem which involves transcendental equation. Besides, this algorithm can solve tracing problem of radome with interface of complicated surface equation, for example, paraboloid radome has its most inside interface paraboloid and the rest interfaces formed by growing homogeneous-thick dielectric layers from the most inside one, therefore, only points on the most inside interface of paraboloid radome satisfy paraboloid surface equation. Because the modified tracing algorithm can work out the exact point where a ray penetrates through an interface, curvature matrix of interface can be solved to determine phase front of reflected or transmitted wave originating from the interface. Second, Ray multiplying algorithm inspired by pointer and link of Fortran 90 is another creation of this paper. It's capable of calculating a complete out-from-radome ray set descended from any into-radome ray and can be applied to resolving any large wavelength radome with its dielectric layer and FSS of any number. Multiplying algorithm identifies FSS and calls corresponding FSS-transmission-and-return-calculating functions. By enriching library of FSS analyzing functions, the program will adapt to more types of FSS radome. Another, the most shinning point of this paper is the realized software.