Abstract:

The input impedance of spherical conformal microstrip antennas fed by the coaxial line is analyzed using the surface-wire integral equation method based on method of moments (MoM). The surface-wire integral equation method has advantages of few unknowns and short calculation time in the analysis process. The equivalent currents on the antenna patch and probe are simulated by the Rao-Wilton-Glisson (RWG) basis function and the triangle basis function respectively. A novel junction basis function is proposed at the junction to keep the current continuity from patch to probe. The field on the surface of the antenna produced by magnetic frill source is calculated based on the magnetic dyadic Green’s functions. Finally, the junction basis function is validated in terms of feasibility, and the input impedance of spherical conformal microstrip antennas are analyzed based on two examples. Calculated results show the validity of the proposed method.