SAF Analysis Models for Antenna Performance, Coupling, RADHAZ, SAF Analysis Models for Antenna Performance, Coupling, RADHAZ, and RCS of Integrate

This advanced development programis devoted to the development of computer models for analyzing 1) antenna patttern performance, 2) antenna coupling, and 3) RADHAZ for antennas that are enclosed or embedded in composite structures, and 4) the resultant RCS of the integrated antenna/composite structures. The computer models will be based on the Spherical Angular Function (SAF) analysis technique for near-field scattering and coupling. Proprietary adaptive asymptotic subroutines will be adapted for efficient analysis of the complex near-field scattering geometries involving micro/millimeter wave antennas enclosed or embedded in the topside composite structures. The computer models will be applicable to the following types of enclosed or embedded antennas: horns, reflectors, traveling wave antennas, planar arrays, and curved arrays. In Phase I, the proof-of-principle for the SAF adaptive asymptotic technique will be demonstrated for flat polygonally-shaped and flat elliptically-shaped multilayer composite and metallic plates. In particular, antenna pattern performance, antenna coupling, RADHAZ, and RCS will be computed for the plates and validated with government-furnished measured data. The approach to be taken to apply the SAF adaptive asymptotic technique to antennas enclosed or embedded in multilayer composite masts having the following cross-sectional shapes, that are either encountered now or are expected to be encountered in the near future, will be presented and discussed: 1) general "n-gon" polygonal cross sections, 2) circular cross sections, and 3) general curved cross sections.