一种用于移动终端的仿“山”字形分形微带天线的设计  

Design of a Fractal Microstrip Antenna with Imitating“Mountain”Shape for Mobile Terminal

作　　者：于臻 李尧 林梓恒 冉小英 姚姝含 梁冰 YU Zhen;LI Yao;LIN Ziheng;RAN Xiaoying;YAO Shuhan;LIANG Bing(School of Electronic&Information Engineering,North China Institute of Science and Technology,Langfang 065201,Hebei,China)

机构地区：[1]华北科技学院电子信息工程学院,河北廊坊065201

出　　处：《实验室研究与探索》2021年第9期125-128,137,共5页Research and Exploration In Laboratory

基　　金：国家重点研发计划(2020YFC1511805);国家自然科学基金(61663014);河北省教育厅高等教育教学改革研究与实践项目(2018GJJG477);河北省高等教育学会课题(GJXH2015-133);中央高校基本科研业务费(3142018048,3142018047)。

摘　　要：在传统微带天线基础上融合中国汉字文化,提出一种结构新型的可用于无线移动终端设备的多波段微带天线。天线辐射体部分为仿汉字"山"字形结构,采用微带线馈电结构,通过3次枝节分形,增加了天线辐射体表面的电流路径,实现天线整体的小型化。天线介质板采用相对介电常数εr=4.4的FR4材料,整体尺寸为40 mm×60 mm×1.6 mm。采用电磁仿真软件HFSS进行天线建模的基础搭建与参数优化,对于不同分形阶段下天线模型进行仿真。通过将天线实物测试数据与仿真数据进行比较,验证了天线设计的合理性。天线在2.35、3.7和5.1 GHz 3个频点,2.15~2.45 GHz与3.35~5.5 GHz两个频段,具有良好的辐射特性,可覆盖4G、5G、WiFi、WIMAX、卫星导航及蓝牙通信频段。This design integrates Chinese character culture on the basis of traditional microstrip antennas,and proposes a multi-band microstrip antenna with a new structure that can be used in wireless mobile terminal equipment.The antenna radiator part adopts the imitating Chinese character“mountain”,and uses the microstrip line structure to feed.Through the branch 3 fractal,the antenna current path is increased,the current path in the limited space is increased,and the overall miniaturization of the antenna is realized.The antenna dielectric board is made of FR-4 material with a relative dielectric constant ofεr=4.4,and the overall size is 40 mm×60 mm×1.6 mm.The electromagnetic simulation software HFSS is used to carry out the basic construction and parameter optimization of antenna modeling,and to simulate and analyze the antenna model under different fractal stages.By comparing the actual antenna test data with the simulation data,the rationality of the antenna design is verified.The antenna has three frequency points of 2.35 GHz,3.7 GHz and 5.1 GHz,and two frequency bands of 2.15-2.45 GHz and 3.35-5.5 GHz.It has good radiation characteristics and can cover 4G,5G,WiFi,WIMAX,satellite navigation and Bluetooth communication frequency bands.

关 键 词：微带天线 多频段 分形天线 小型化 HFSS建模 性能测试 

分 类 号：TN822[电子电信—信息与通信工程]