Analysis on spherical conformal microstrip antenna array by characteristic basis function method

作者：Yu Tao^*; Yin Cheng-You; Liu Han

来源：Acta Physica Sinica, 2014, 63(23): 230701.

DOI：10.7498/aps.63.230701

• spherical conformal microstrip antenna array
• surface integral equation
• curvilinear triangle
• characteristic basis function

Spherical conformal microstrip antenna array which is used widely in the field of aeronautics is analyzed by the full wave analysis in this paper. Using the surface integral equation with spherical dyadic Green's function can decrease the number of unknowns remarkably, and also reduce the demand of memory as compared with the method using volume-surface integral equation. The curvilinear triangle is proposed to mesh the surface of the microstrip antenna array, which can simulate the characteristic of spherical surface accurately. Firstly, the problem about probe feed model is solved successfully by introducing the half Rao-Wilton-Glisson function and boundary charge, and the image method is used to treat the line integral singularity problem. Then, the characteristic basis function method is employed to further save memory and computation time further by reducing the rank of impedance matrix. Finally, the input impedance and far-field spherical conformal microstrip antenna array of different sizes are analyzed. Results are in good agreement with those in the literature and simulation software, and thus the validity and effectiveness of the analysis method are demonstrated.

• 出版日期2014-12-10
• 单位中国科学院电工研究所