High-Isolation Wide-Angle Scanning L-/S-Band Shared-Aperture Phased Array Antenna Based on Self-Decoupling Technique

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-09-03 DOI:10.1109/LAWP.2025.3605863

Ling-Long Gou;Yue Zhao;Bo-da Jing;Bin Shi;Jing Ma;Kun-Shan Mo;Lin Peng

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引用次数: 0

Abstract

Cross-band interferences could deteriorate the performance of a dual-band shared-aperture phased array antenna (SAPAA), especially in small frequency ratio SAPAAs. This letter proposes novel self-decoupling techniques in an L-/S-band SAPAA to achieve out-of-band suppressions as low as −27.4 and 20.3 dBi for the radiations of L and S bands, respectively, and the cross-band port isolations are both more than 30 dB, with peak values exceeding 60 dB, without the need for additional filter circuits or decoupling structures. In addition, new technique of capacitive coupling folded arm is proposed to realize wide-beam and wideband characteristics. The shared-aperture structure is formed by a staggered arrangement of 4 × 4 L-/S-band endfire dipole antennas. As a result, the scanning range of the SAPAA can achieve ±60°/±70° in the E-/H-plane at 1.5 GHz to 1.8 GHz with voltage standing-wave ratios (VSWRs) under 3.3, and it can achieve ±60° in both the E-/H-plane at 2.5 GHz to 2.9 GHz with VSWRs under 3.3. The consistency of the measurement and simulation validates the designs.

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基于自解耦技术的高隔离广角扫描L / s波段共孔径相控阵天线

双频共享孔径相控阵天线（SAPAA）的交叉带干扰会影响其性能，尤其是在频率比较小的情况下。本文提出了一种新颖的L /S波段SAPAA自去耦技术，可实现L和S波段辐射的带外抑制分别低至- 27.4和20.3 dBi，并且跨带端口隔离均大于30 dB，峰值超过60 dB，无需额外的滤波电路或去耦结构。此外，提出了电容耦合折叠臂的新技术，以实现宽波束和宽带特性。共孔径结构由4 × 4 L / s波段端火偶极子天线交错排列而成。结果表明，SAPAA在1.5 GHz ~ 1.8 GHz的E-/ h面扫描范围可以达到±60°/±70°，电压驻波比在3.3以下；在2.5 GHz ~ 2.9 GHz的E-/ h面扫描范围可以达到±60°，电压驻波比在3.3以下。测量和仿真结果的一致性验证了设计的正确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.