60 GHz Planar Circular-Polarized Filtering Antenna and Its Integrated Design With Folded Reflectarray

IF 4.6 1区 计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Hao-Tao Hu;Ka Fai Chan;Chi Hou Chan
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引用次数: 0

Abstract

The circular-polarized (CP) filtering antenna design based on the radiation-null-introducing technique emphasizes introducing specific filtering structures on the radiator or feeding structure. However, imperfect filtering structures are prone to generate radiation leakages toward nonboresight directions at the stopband, resulting in degraded filtering characteristics in the peak realized gain response. This article introduces two new CP filtering antennas operating at 60 GHz: one involves a single antenna element and the other involves a folded reflectarray antenna (FRA), both presenting an outstanding peak realized gain filtering response. A unique folded double-layer substrate-integrated-waveguide (SIW) feeding structure incorporated with a self-energy-bounding CP radiator is proposed for the antenna element. No filtering structure is needed in the radiator. The feeding structure, independent of the resonator cavity, inherently minimizes radiation leakages and can produce three radiation nulls, guaranteeing the desired filtering characteristic. The proposed CP filtering antenna element is then integrated with a folded metasurface to create a new CP filtering FRA. Both antennas feature high selectivity, ample stopband rejection, stable CP radiation in upper millimeter-wave (mmW) frequencies, and easy integration, making them suitable for 60-GHz communications and sensing systems applications.
60 GHz平面圆极化滤波天线及其折叠反射阵集成设计
基于零辐射引入技术的圆极化滤波天线设计强调在辐射体或馈电结构上引入特定的滤波结构。然而,不完善的滤波结构容易在阻带处产生向非视轴方向的辐射泄漏,从而导致峰值实现增益响应的滤波特性下降。本文介绍了两种工作在60ghz的新型CP滤波天线:一种采用单天线元件,另一种采用折叠反射天线(FRA),两者都具有出色的峰值实现增益滤波响应。提出了一种独特的折叠双层基板集成波导(SIW)馈电结构,并结合了自能边界CP辐射体。散热器不需要过滤结构。该馈电结构独立于谐振腔,固有地最大限度地减少了辐射泄漏,并可以产生三个辐射零,保证了所需的滤波特性。然后将所提出的CP滤波天线单元与折叠的超表面集成以创建新的CP滤波FRA。这两种天线具有高选择性,充足的阻带抑制,稳定的毫米波(mmW)频率CP辐射,易于集成,使其适用于60 ghz通信和传感系统应用。
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来源期刊
CiteScore
10.40
自引率
28.10%
发文量
968
审稿时长
4.7 months
期刊介绍: IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques
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