Design of diamond-shaped wideband antenna based on characteristic mode analysis

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Apr.2024, Vol.47 No.4: 502-507

DOI: 10.3969/j.issn.1003-5060.2024.04.011

Authors

JI Fangzheng $ ^{1} $, JIANG Zhaoneng $ ^{2} $, NIE Liying $ ^{2} $, XUAN Xiaofeng $ ^{1} $

(1. School of Microelectronics, Hefei University of Technology, Hefei 230601, China; 2. School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230601, China)

Abstract and Keywords

Abstract: A kind of diamond-shaped metasurface antenna with simple structure is proposed through characteristic mode analysis (CMA). The antenna is symmetrical along the Y-axis and composed of six diamond-shaped patches and two modified diamond-shaped patches. The modified diamond-shaped antenna enhances the required broadside radiation in the horizontal direction and weakens the current intensity in the vertical direction. The electric field coupling slot is the feeding part and can be regarded as a half-wave slot antenna introducing a new resonance point to increase the antenna bandwidth. The antenna has a compact structure and the size is only $ 0.60\lambda_{0} \times 0.55\lambda_{0} $ ( $ \lambda_{0} $ is the free space wavelength corresponding to the center frequency). The simulation results show that the antenna can achieve a -10 dB bandwidth at 4.5-6.2 GHz, and a relative bandwidth of 31.8%. The resonance points of the high and low frequency centers are 4.78 GHz and 5.88 GHz, respectively. The radiation performance of the antenna is good, and the gain is greater than 6 dB in the pattern bandwidth.

Keywords: characteristic mode analysis(CMA); ultra-wideband; low profile; microstrip patch antenna; diamond-shaped patch

作者信息

计方正 $ ^{1} $，姜兆能 $ ^{2} $，聂丽瑛 $ ^{2} $，宣晓峰 $ ^{1} $

(1. 合肥工业大学微电子学院, 安徽合肥 230601; 2. 合肥工业大学计算机与信息学院, 安徽合肥 230601)

摘要和关键词

摘要: 文章通过特征模分析提出一种结构简单的菱形超表面天线, 天线沿 Y 轴对称, 由 6 个菱形贴片和 2 个修改过后的菱形贴片组成。修改过后的菱形天线增强所需水平方向的宽边辐射, 减弱垂直方向的电流强度。电场耦合槽为馈电部分并且本身可以看作半波缝隙天线引入新谐振点增加天线带宽; 天线结构紧凑, 尺寸仅为 $ 0.60\lambda_{0} \times 0.55\lambda_{0} (\lambda_{0} $ 为中心频率对应的空间自由波长）。仿真结果表明, 该天线频率在 $ 4.5 \sim 6.2 $ GHz 范围内能够实现 -10 dB 带宽, 相对带宽达到 31.8%, 高低频中心的谐振点分别为 4.78、5.88 GHz。天线工作时的辐射性能良好, 在方向图带宽内增益大于 6 dB。

关键词: 特征模分析；超宽带；低剖面；微带天线；菱形贴片

Funding

安徽省自然科学基金资助项目（1608085MF124）；合肥工业大学产学研校企合作资助项目（W2021JSKF0153；W2020JSFW0112）和合肥工业大学教师计划资助项目（JZ2019HGTB0093）

合肥工业大学学报(自然科学版)

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