Effective Electrodynamic Analysis of Small-Size Dielectric Lenses

We develop an electrodynamic method for analysis of the near- and far-zone fields of dielectric lenses, which is based on solving a high-frequency integral equation. It is shown that the accuracy of this method is high for the lens size exceeding four wavelengths. Its advantages are fast internal convergence of the solution, short computation times, and small computer resources needed. The near-zone fields of lenses having various profiles and sizes of about ten wavelengths are analyzed.