A Hybrid Design Method for Thin-Panel Transmitarray Antennas
A Hybrid Design Method for Thin-Panel Transmitarray Antennas
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DOI：
10.1109/tap.2019.2923076
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发表时间：
2019-06
影响因子：
5.7
通讯作者：
Q. Luo;S. Gao;M. Sobhy;Xue-xia Yang;Zhiqun Cheng;Yong-Lin Geng;J. Sumantyo
中科院分区：
文献类型：
--
作者：
Q. Luo;S. Gao;M. Sobhy;Xue-xia Yang;Zhiqun Cheng;Yong-Lin Geng;J. Sumantyo
本文提出了一种新的混合设计技术，以最大限度地减少传输阵列（TA）面板的层数，同时保持360°相移范围。两种类型的单位单元，接收-发射单位单元和频率选择表面（FSS），被放置在同一孔径。所得到的TA面板非常薄，但不会牺牲阵列的辐射效率。收发单元是一个孔径耦合的正方形贴片，而频率选择表面单元是一种新型的宽带通频率选择表面。两种类型的单元电池都有三个导电层，并印刷在两个基板上，总厚度为0.07\lambda_{0} $。所开发的混合TA显示出更好的增益比均匀TA使用相同的元素。同时，它具有相当的辐射性能，但与传统的基于FSS的TA设计相比，具有更低的轮廓，该设计使用由空气层分隔的几个基板。为了验证设计概念，两个不同尺寸的混合TA的中心频率在13.3 GHz的设计和制造。测试结果表明，TA的1dB增益带宽至少为6.7%，孔径效率高于30%。与现有的具有相似板厚的TAs设计相比，所提出的TA不遭受相位量化损失，并且实现更好或相似的带宽。
This paper presents a novel hybrid design technique to minimize the number of layers of the transmitarray (TA) panel while maintaining 360° phase shift range. Two types of unit cells, the receive–transmit unit cell and the frequency selective surface (FSS), are placed in the same aperture. The resulting TA panel is very thin but does not sacrifice the radiation efficiency of the array. The receive–transmit unit cell is an aperture-coupled square patch, and the FSS unit cell is a novel wide bandpass FSS. Both types of unit cells have three conductive layers and are printed on two substrates with a total thickness of $0.07\lambda _{0} $ . The developed hybrid TA shows better gain than a homogeneous TA using the same elements. Meanwhile, it has comparable radiation performance but with a much lower profile compared to the conventional FSS-based TA designs that use several substrates separated by air layers. To verify the design concept, two hybrid TAs of different sizes with central frequency at 13.3 GHz were designed and fabricated. The measurements show that the TAs have at least 6.7% 1 dB gain bandwidth and higher than 30% aperture efficiency. Compared to the existing ultrathin designs of similar panel thickness, the presented TAs do not suffer from the phase quantization loss and achieve better or similar bandwidths.