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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Single Feed Dual-Polarization Dual-Band Transmitarray for Satellite Applications
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Single Feed Dual-Polarization Dual-Band Transmitarray for Satellite Applications

机译：单馈双极化双频发送阵列，用于卫星应用

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摘要

In this paper, two transmitarrays are designed, analyzed, and simulated for satellite applications. The first transmitarray is designed for dual linear polarization at a center frequency of 12 GHz. The second transmitarray is designed for two frequency bands: 17.15 GHz to 17.9 GHz for vertical polarization and 11.5 GHz to 12.4 GHz for horizontal polarization. The dual polarization is obtained by an independent adjustment of the dimensions of two orthogonal slots in the transmitarray unit cell. The design is carried out independently for each polarization. The transmitarray unit cell uses two dielectric substrate layers arranged to be one on each side of a conducting plane. On each substrate, one face has metallization containing the patches, and the other face has metallization containing the ground plane. The two patches are coupled by two cross slots of lengths L-v and L-H in the ground plane and each patch is loaded with two cross slots of lengths L-v/2 and L-H/2. The unit cell achieves 360 of phase agility with less than 3.8 dB of variation in the transmission magnitude in the tuning range. The transmitarray consisted of 17x17 elements with the unit cell size were set at 13 mm. A circular feed horn is located on the central normal to the transmitarray and the configuration looks like a lens antenna. Two separate feeding pins are used to excite the horn antenna for horizontal and vertical polarizations. The results are worked out using two basically different numerical techniques, the finite element method, FEM, and the finite integration technique, FIT. Good agreement was obtained.
机译：在本文中，针对卫星应用设计，分析和仿真了两个发射阵列。第一个发射阵列设计用于中心频率为12 GHz的双线性极化。第二个发射阵列设计用于两个频带：垂直极化为17.15 GHz至17.9 GHz，水平极化为11.5 GHz至12.4 GHz。通过独立调整发射阵列单位单元中两个正交缝隙的尺寸来获得双极化。针对每种极化独立进行设计。发射阵列单位单元使用两个电介质衬底层，该两个电介质衬底层被布置为在导电平面的每一侧上。在每个基板上，一个表面具有包含贴片的金属化层，而另一个表面具有包含接地层的金属化层。两个贴片通过接地平面中长度为L-v和L-H的两个交叉槽耦合，并且每个贴片都装有两个长度为L-v / 2和L-H / 2的交叉槽。单位单元可实现360度的相位敏捷性，且调谐范围内的传输幅度变化小于3.8 dB。发射阵列由17x17个元素组成，单位像元大小设置为13 mm。圆形馈电喇叭位于发射阵列的中央法线，其配置看起来像透镜天线。两个单独的馈电引脚用于激励喇叭天线以产生水平和垂直极化。结果是使用两种基本不同的数值技术得出的，即有限元方法FEM和有限积分技术FIT。获得了良好的协议。

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