一种组合式天线辐射电磁波的可视化研究

夏海, 滕保华, 李嘉盛, 范志斌, 吴明和

doi:10.16854/j.cnki.1000-0712.210590

大学物理 >

2022 , Vol. 41 >Issue 6: 51

DOI: https://doi.org/10.16854/j.cnki.1000-0712.210590

物理实验

一种组合式天线辐射电磁波的可视化研究

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1. 电子科技大学物理学院，四川成都611731；2. 电子科技大学生命科学学院，四川成都611731

夏海（1998—），男，四川眉山人，电子科技大学物理学院2020级硕士研究生.

收稿日期: 2021-12-01

修回日期: 2021-12-30

网络出版日期: 2022-06-15

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Visualization research on the electromagnetic wave (EMW) radiated by a mixed transmission antenna

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1. School of Physics, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China;
2. School of Life Science, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China

Received date: 2021-12-01

Revised date: 2021-12-30

Online published: 2022-06-15

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摘要

通过形象、直观的组合式天线演示实验，让初次接触电磁波的新手“看见”电磁波，掌握麦克斯韦电磁理论精髓和实质.首先搭建一种组合式发射天线，即馈电电小磁偶极子天线，它与理想的磁偶极子天线的远场辐射有一定的差异.然后应用电磁学中的电场叠加原理，讨论这种组合式天线与理想的磁偶极子天线在3个特殊方向上远场辐射的能流密度的差异性.

关键词： 电磁波; 组合式发射天线; 叠加原理; 能流密度

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夏海, 滕保华, 李嘉盛, 范志斌, 吴明和 . 一种组合式天线辐射电磁波的可视化研究[J]. 大学物理, 2022 , 41(6) : 51 . DOI: 10.16854/j.cnki.1000-0712.210590

Abstract

In order to understand the Maxwell theory, the electromagnetic wave (EMW) is visualized for new comer with the demonstration experiment. The radiation of a mixed transmission antenna, regarded as a mixture of the small magnetic and electrical dipole antennas, is not the same as that of the ideal magnetic dipole antenna due to the introduction of a gap. The discrepancies of the radiated energy flux density are discussed between the mixed antenna and ideal magnetic dipole antenna according to superposition theorem (ST) of the induced electrical field.

Key words： electromagnetic wave (EMW); a mixed transmission antenna; superposition theorem (ST); energy flux density

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