论文标题
高效率，宽带笑镜，具有内在匹配的单位细胞
High-efficiency, Wideband GRIN Lenses with Intrinsically Matched Unit-cells
论文作者
论文摘要
我们提出了一个自动设计程序，以快速实现宽带毫米波镜头天线。该设计方法基于建立匹配的单位细胞库，其中包括相位延迟核心部分两侧的宽带阻抗匹配部分。每个单位细胞的相位积累和阻抗匹配在频率和入射角上的表征。将镜头分为环，每个环都基于入射角分配一个最佳单位细胞，并且鉴于透镜必须对入射波锋进行编织，因此所需的局部相校正。可用于给定可实现的介电范围，镜头厚度和单位电池堆栈的单位电池库可用于设计各种平坦的宽带镜头，用于各种直径，进料元件和焦距。在远场和近场腔室中设计，制造和测量了一个示范笑透镜天线。天线的功能如图14 GHz至40 GHz，因此适用于所有提出的5G MMW频段，KU-和KA波段固定卫星服务。在2.9：1带宽上，内在匹配的单位细胞的使用导致孔径效率在31％至72％之间，这是在如此宽的操作带中显示出的最高孔径效率。
We present an automated design procedure for the rapid realization of wideband millimeter-wave lens antennas. The design method is based upon the creation of a library of matched unit-cells which comprise wideband impedance matching sections on either side of a phase-delaying core section. The phase accumulation and impedance match of each unit-cell is characterized over frequency and incident angle. The lens is divided into rings, each of which is assigned an optimal unit-cell based on incident angle and required local phase correction given that the lens must collimate the incident wavefront. A unit-cell library for a given realizable permittivity range, lens thickness, and unit-cell stack-up can be used to design a wide variety of flat wideband lenses for various diameters, feed elements, and focal distances. A demonstration GRIN lens antenna is designed, fabricated, and measured in both far-field and near-field chambers. The antenna functions as intended from 14 GHz to 40 GHz and is therefore suitable for all proposed 5G MMW bands, Ku- and Ka-band fixed satellite services. The use of intrinsically matched unit-cells results in aperture efficiency ranging from 31% to 72% over the 2.9:1 bandwidth which is the highest aperture efficiency demonstrated across such a wide operating band.
