Reflections inside an elliptical dielectric lens antenna
Reflections inside an elliptical dielectric lens antenna
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椭圆介电透镜天线内的反射
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
P. Maagt
中科院分区：
文献类型：
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作者：
A. Neto;S. Maci;P. Maagt
本文研究了典型毫米波天线椭圆透镜内的反射。特别地，可以看出，这些反射可以显著地影响位于透镜焦点处的辐射元件的输入阻抗，这是由于在该处存在双反射光线的点焦散。焦散线的存在阻止了通过直接应用几何光学来预测透镜内部的场。因此，透镜内部的场通过与单反射和双反射光线相关联的物理光学电流来计算。
The reflections inside the elliptical lens of a typical millimetre wave antenna are investigated. In particular, it is seen that these reflections may significantly affect the input impedance of a radiating element which is located at the lens focus, owing to the presence there of a point caustic of doubly reflected rays. The presence of a caustic prevents the field prediction inside the lens by a direct application of geometrical optics. Consequently, the field inside the lens is calculated by means of the physical optics currents associated with singly and doubly reflected rays.