Ray-Tracing and Physical-Optics Model for Planar Mikaelian Lens Antennas
| العنوان: | Ray-Tracing and Physical-Optics Model for Planar Mikaelian Lens Antennas |
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| المؤلفون: | Chen, Ming Zheng, Habiboglu, Özüm, Mesa, Francisco, Quevedo-Teruel, Oscar |
| المصدر: | IEEE Transactions on Antennas and Propagation. 72(2):1735-1744 |
| مصطلحات موضوعية: | Lenses, Antennas, Antenna radiation patterns, Ray tracing, Dielectric materials, Dielectric losses, Antenna feeds, Dielectric efficiency, directivity, gain, Mikaelian lens antenna, parallel plate waveguide (PPW), physical optics (PO), ray tracing (RT) |
| الوصف: | This article proposes a ray-tracing and physical-optics (RT-PO) model that allows for an accurate and time-efficient evaluation of planar Mikaelian lens antennas implemented by parallel plate waveguides (PPWs). With an intrinsic flat shape and axis-symmetry of refractive-index distribution characteristics, the planar Mikaelian lens antennas are easy to fabricate and integrate into standard planar feeds. A numerical computation of the ray paths based on Snell's law describes the phase of the electric field in the lens aperture, while the ray-tube power conservation theory is employed to evaluate the amplitude. The field equivalence principle is then used to calculate the far-field of the lens antenna. The information on far-field directivity, gain, and dielectric efficiency is further obtained, considering a small loss in the dielectric materials. Our approach is validated by comparing the results of a particular Mikaelian lens antenna with those computed using a commercial full-wave simulator, demonstrating high accuracy and a significant reduction in computation resources and times. |
| وصف الملف: | |
| URL الوصول: | https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-345555 https://doi.org/10.1109/TAP.2023.3348983 |
| قاعدة البيانات: | SwePub |
| تدمد: | 0018926X 15582221 |
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| DOI: | 10.1109/TAP.2023.3348983 |