A Compact Wideband Circularly Polarized Tapered Slot Antenna With Bent Directors Based on Double-Ridge GWG

IF 3.7 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-02-07 DOI:10.1109/LAWP.2025.3539690

Shuanglong Quan;Jianyin Cao;Hao Wang;Yan Wang

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Abstract

In this letter, a wideband circular polarized (CP) antenna based on a double ridge gap waveguide (GWG) with endfire radiation is proposed. The symmetric tapered slots are etched for CP condition. The periodic ridge structures are introduced between the transition ridge and periodic pins to increase the current path. By this means, the appropriate phase differences of orthogonal electric fields are achieved within a compact radiation aperture. The bent dipoles are added at the end of the tapered slot to improve the amplitude and phase condition at lower frequency. Additionally, the gradient transitions from the ridge to the radiation aperture are adjusted for wide impedance matching performance. To validate the proposed antenna, a 1 × 4 CP array fed from the double ridge GWG power divider was fabricated and measured. A measured bandwidth of 32.6% [(28.2 to 39.2) GHz] for both S₁₁<−10 dB and AR < 3 dB is achieved. Taking advantage of the double ridge GWG, the radiation performances of this antenna are measured with symmetric patterns and a peak gain of 15 dBi. Besides, the efficiency of this antenna is more than 74.5% over the frequency band.

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一种基于双脊GWG的弯曲导向窄带圆极化锥形槽天线

本文提出了一种基于端射双脊隙波导的宽带圆极化（CP）天线。在CP条件下刻蚀对称锥形槽。在过渡脊和周期引脚之间引入周期脊结构以增加电流路径。通过这种方法，在紧凑的辐射孔径内获得了适当的正交电场相位差。在锥形槽的末端加入弯曲的偶极子，以改善低频时的幅相状况。此外，从脊到辐射孔径的梯度转换进行了调整，以获得宽阻抗匹配性能。为了验证所提出的天线，制作了一个由双脊GWG功率分配器馈电的1 × 4 CP阵列并进行了测量。在S11<−10 dB和AR < 3 dB的情况下，测量带宽均达到32.6% [(28.2 ~ 39.2)GHz]。利用双脊GWG，采用对称方向图测量了该天线的辐射性能，峰值增益为15dbi。此外，该天线在整个频段内的效率超过74.5%。

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.