Cylindrical Slot FSS Configuration for Beam-Switching Applications
Cylindrical Slot FSS Configuration for Beam-Switching Applications
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DOI：
10.1109/tap.2014.2367534
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发表时间：
2015
影响因子：
5.7
通讯作者：
B. Liang;B. Sanz-Izquierdo;E. Parker;J. Batchelor
中科院分区：
文献类型：
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作者：
B. Liang;B. Sanz-Izquierdo;E. Parker;J. Batchelor
提出了一种基于有源圆柱缝隙频率选择表面（ACSFSS）的波束切换天线的设计方法。该天线系统由全向微带天线和采用新型开关缝隙阵技术的交流自适应滤波器组成。ACSFSS由12个柱组成，每个柱有8个槽，将圆柱体分成30°。为了操纵天线的波束，二极管被设置为关断和接通，使得天线的辐射图案由关断状态列的数量确定。为了估计圆柱形FSS的总体尺寸，引入并优化了等效金属反射器，然后讨论了晶胞尺寸的参数研究。制造的原型工作在WLAN频段内，以2.45 GHz为中心，可以灵活地选择窄波束或宽波束工作模式。仿真和测量证实了ACSFSS天线的工作，具有良好的匹配和增益观察。特别地，窄波束模式-3 dB波束宽度为47°，与其他报道的波束扫描工作相比，这提供了增强的角分辨率。
A novel design for a beam-switching antenna using active cylindrical slot frequency selective surface (ACSFSS) is presented. The antenna system is composed of an omnidirectional monopole antenna and the ACSFSS, which employs a new technique of switching slot arrays. The ACSFSS is made up of 12 columns with 8 slots each, dividing the cylinder by 30°. To steer the beam of the antenna the diodes are set off and on, so that the radiation pattern of the antenna is determined by the number of off state columns. To estimate the general dimension of the cylindrical FSS, an equivalent metallic reflector is introduced and optimized, and then parametric studies for the unit cell dimensions are discussed. The fabricated prototype works within the WLAN band, centered around 2.45 GHz, and can agilely select either a narrow-beam or wide-beam operating mode. Simulation and measurements confirm the operation of the ACSFSS antenna, with good matching and gain observed. In particular, the narrow-beam mode -3 dB beamwidth is 47° which offers enhanced angular resolution compared with other reported beam-sweeping work.