Dual-Band Circularly Polarized Shared-Aperture Antenna With Simplified Feeding Configuration Based on Phase Difference Compensation Technique for Smartphone Applications

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

IEEE Antennas and Wireless Propagation Letters Pub Date : 2026-04-01 Epub Date: 2026-02-23 DOI:10.1109/LAWP.2026.3666805

Tongyu Ding;Huaibin Wang;Shaoqing Zhang;Liang Zhang;Chong-Zhi Han

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引用次数: 0

Abstract

This letter presents a simplified dual-band circularly polarized (CP) antenna for smartphones, operating at 1.575 GHz and 3.8 GHz. First, two folded dipoles are introduced and integrated into the upper and right bezels of the handset, achieving dual-band resonant performance. Second, lumped-element loading technique, e.g., series capacitors and inductors loading, is proposed to adjust the 1st- and 3rd-order mode resonances to the desired frequencies. Third, only one power divider as well as phase shifter is introduced as sequentially rotated feeding (SRF) configuration, achieving CP performance at 1.575 GHz. Fourthly, phase difference compensation technique (PDCT) is applied to adjust the phase difference at 3.8 GHz without destroying the CP performance at 1.575 GHz. Finally, dual-band CP performance can be obtained due to the proposed PDCT. A prototype was fabricated and tested, indicating gratifying dual-band CP performance of −6 dB impedance bandwidth of 115 MHz, 3 dB AR bandwidth of 450 MHz at 1.575 GHz, and impedance bandwidth of 300 MHz, 3 dB AR bandwidth of 160 MHz at 3.8 GHz. The proposed antenna features a simple structure for integration into a handset, offering a novel approach for achieving dual-band CP performance.

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基于相位差补偿技术的智能手机简化馈电结构双频圆极化共孔径天线

本文介绍了一种用于智能手机的简化双频圆极化（CP）天线，工作频率为1.575 GHz和3.8 GHz。首先，两个折叠的偶极子被引入并集成到手机的上下边框，实现双频谐振性能。其次，提出了集总元件加载技术，例如串联电容和电感加载，以调整一阶和三阶模式谐振到所需的频率。第三，仅引入一个功率分配器和移相器作为顺序旋转馈电（SRF）配置，实现了1.575 GHz的CP性能。第四，采用相位差补偿技术（PDCT）对3.8 GHz的相位差进行调整，同时不破坏1.575 GHz的CP性能。最后，由于所提出的PDCT，可以获得双频CP性能。制作了样机并进行了测试，结果表明，在1.575 GHz时- 6 dB阻抗带宽为115 MHz， 3 dB AR带宽为450 MHz，在3.8 GHz时阻抗带宽为300 MHz， 3 dB AR带宽为160 MHz，双频CP性能令人满意。该天线结构简单，易于集成到手机中，为实现双频CP性能提供了一种新颖的方法。

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.