A Single-Layer Low-Profile Frequency-Reconfigurable Filtenna Without Extra Filtering Circuits

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-09-11 DOI:10.1109/LAWP.2024.3458456

Kun-Zhi Hu;Jiang Yu;Dajiang Li;Zhiyuan Chen;Xiaoming Chen;Dong Yan

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Abstract

A single-layer low-profile frequency-reconfigurable filtenna (FRF) is proposed. It has a simple structure, which mainly consists of a driven patch and two parasitic patches. A lower radiation null is generated by etching a pair of narrow slots on the driven patch, and it can be flexibly regulated by changing the length of the extended part of the driven patch on both sides of the slots. The incorporation of the parasitic patches introduces an extra in-band resonance and an upper radiation null, thereby broadening the impedance bandwidth and enhancing the selectivity simultaneously. Five varactors were employed to realize the frequency adjustment, and only two sets of the bias voltages were supplied to realize the control, which reduces the antenna's complexity. A prototype was fabricated and measured to validate its feasibility, and the measured results demonstrated good agreement with the simulation ones. The proposed FRF has a size of 0.62 λ ₀ × 0.62 λ ₀ × 0.015 λ ₀ , a tuning range of 19.6% [(2.53 to 3.08) GHz], and a stopband suppression level exceeding 10 dB within this tuning range.

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无需额外滤波电路的单层扁平式频率可重构滤波器

提出了一种单层低频可重构滤波器（FRF）。它结构简单，主要由一个驱动片和两个寄生片组成。通过在驱动贴片上刻蚀一对窄槽产生较低的辐射零，并且可以通过改变驱动贴片在槽两侧的延伸部分的长度来灵活调节。寄生贴片的加入引入了额外的带内共振和上辐射零，从而拓宽了阻抗带宽，同时提高了选择性。采用5个变容管实现频率调节，只提供两组偏置电压即可实现控制，降低了天线的复杂度。制作了样机并进行了测试，验证了该方法的可行性，测试结果与仿真结果吻合较好。所提出的频响尺寸为0.62 λ0 × 0.62 λ0 × 0.015 λ0，调谐范围为19.6% [(2.53 ~ 3.08)GHz]，在此调谐范围内阻带抑制电平超过10 dB。

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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.