A Sandwich-Like Dual-Band Shared-Aperture Dielectric Lens Antenna With Large Frequency Ratio and Wide Scanning Range

IF 5.9 1区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Antennas and Propagation Pub Date : 2026-09-01 Epub Date: 2026-06-05 DOI:10.1109/TAP.2026.3698438

Yuntao Ye;Zhixi Liang;Shaoyong Zheng;Kwok Wa Leung

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Abstract

A sandwich-like, dual-band shared-aperture (DBSA) dielectric lens antenna (DLA) configuration is proposed to realize a wide scanning range in the microwave (MW) and millimeter-wave (MMW) bands with a large frequency ratio. The configuration comprises three vertically stacked lens layers separated by air gaps. This layered structure spatially decouples the propagation regions: electromagnetic (EM) waves of the MW band propagate throughout the entire lens, whereas those of the MMW band are confined to the middle layer by the air gaps and frequency-selective metamaterials (MTMs) in the top and bottom layers. This decoupling fundamentally avoids severe modal interference. Moreover, this configuration allows the adoption of a heterogeneous MTM design with distinct periods across layers, reducing structural complexity and enhancing fabrication tolerance. Two prototypes were designed, fabricated, and measured for verification. The cylindrical DLA covers the 5.8 GHz ISM band and the n258 band (24.25–27.5 GHz), achieving a frequency ratio of 4.48:1 and a wide azimuthal scanning angle of ±77° in both bands. The spherical DLA is used to illustrate the configuration’s scalability in expanding the frequency ratio and scanning dimensions. Covering the 2.4 GHz ISM and n258 bands with an ultra-large frequency ratio of 10.61:1, it achieves an azimuthal scanning angle of ±55° in both bands and an elevational scanning angle of ±55° in the MW band.

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大频率比宽扫描范围的三明治状双频共孔径介质透镜天线

为了实现大频率比微波（MW）和毫米波（MMW）波段的宽扫描范围，提出了一种三明治状双频共享孔径（DBSA）介质透镜天线（DLA）结构。该结构包括由气隙分隔的三个垂直堆叠的透镜层。这种分层结构在空间上解耦了传播区域：毫瓦波段的电磁波（EM）在整个透镜中传播，而毫米波波段的电磁波则被顶层和底层的气隙和频率选择性超材料（mtm）限制在中间层。这种解耦从根本上避免了严重的模态干扰。此外，这种配置允许采用具有不同层间周期的异构MTM设计，降低了结构复杂性并提高了制造公差。设计、制造和测量了两个原型以进行验证。圆柱形DLA覆盖5.8 GHz ISM频段和n258频段（24.25 ~ 27.5 GHz），频率比为4.48:1，两个频段的方位角均为±77°。以球形DLA为例，说明了该结构在扩展频率比和扫描尺寸方面的可扩展性。覆盖2.4 GHz ISM和n258频段，频率比为10.61:1，两个频段的方位扫描角均为±55°，MW频段的仰角扫描角均为±55°。

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来源期刊

IEEE Transactions on Antennas and Propagation 工程技术-电信学

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