首页|基于特征模分析的菱形宽带天线设计

基于特征模分析的菱形宽带天线设计

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

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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0.60λ0×0.55λ0(λ0 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 4.5～6.2 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6dB.
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 an-tenna enhances the required broadside radiation in the horizontal direction and weakens the current in-tensity 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 0.60λ0×0.55λ0(λ0 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.

characteristic mode analysis(CMA)ultra-widebandlow profilemicrostrip patch anten-nadiamond-shaped patch

计方正、姜兆能、聂丽瑛、宣晓峰

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合肥工业大学 微电子学院,安徽 合肥 230601

合肥工业大学 计算机与信息学院,安徽 合肥 230601

特征模分析 超宽带 低剖面 微带天线 菱形贴片

安徽省自然科学基金资助项目合肥工业大学产学研校企合作资助项目合肥工业大学产学研校企合作资助项目合肥工业大学教师计划资助项目

1608085MF124W2021JSKF0153W2020JSFW0112JZ2019HGTB0093

2024

10.3969/j.issn.1003-5060.2024.04.011

合肥工业大学学报(自然科学版)
合肥工业大学

合肥工业大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.608
ISSN：1003-5060
年,卷(期)：2024.47(4)
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