Electrically Small Quasi-Isotropic Circular Sector Magnetic Dipole Antenna

YU Jian; LÜ Wen-jun

doi:10.12263/DZXB.20220276

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Electrically Small Quasi-Isotropic Circular Sector Magnetic Dipole Antenna

PAPERS | 更新时间：2025-12-08

- Electrically Small Quasi-Isotropic Circular Sector Magnetic Dipole Antenna
- ACTA ELECTRONICA SINICA Vol. 51, Issue 8, Pages: 2003-2010(2023)
- 作者机构：
  
  南京邮电大学通信与信息工程学院江苏省无线通信重点实验室，江苏南京 210003
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program(2021YFE0205900);National Natural Science Foundation of China(61871233)
- DOI：10.12263/DZXB.20220276
  CLC： TN82;
- Received：18 March 2022，
  
  Revised：2022-06-28，
  
  Published：25 August 2023
- 稿件说明：
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郁剑,吕文俊.电小准各向同性扇形磁偶极子天线[J].电子学报,2023,51(08):2003-2010.

YU Jian,LÜ Wen-jun.Electrically Small Quasi-Isotropic Circular Sector Magnetic Dipole Antenna[J].ACTA ELECTRONICA SINICA,2023,51(08):2003-2010.
郁剑,吕文俊.电小准各向同性扇形磁偶极子天线[J].电子学报,2023,51(08):2003-2010. DOI： 10.12263/DZXB.20220276.

YU Jian,LÜ Wen-jun.Electrically Small Quasi-Isotropic Circular Sector Magnetic Dipole Antenna[J].ACTA ELECTRONICA SINICA,2023,51(08):2003-2010. DOI： 10.12263/DZXB.20220276.

摘要

本文提出了一种电小准各向同性扇形磁偶极子的设计方法.利用微带贴片天线模式综合设计方法，研究由不对称边界条件原型磁偶极子演化成的扇形磁偶极子，发现不对称边界条件情况下可以同时实现电小天线设计和准各向同性辐射特性.通过推导解析设计闭式而确定天线关键参数，设计了圆心角为300°的扇形磁偶极子，分别采用“同轴线+扼流套筒”和“开槽同轴线”两种馈电方式进行激励和测量.结果表明：采用开槽同轴线激励的天线可以获得最均匀的总电场方向图，其最大不圆度低于6.7 dB，辐射效率为91.2%，最终实现的准各向同性扇形磁偶极子的电尺寸为

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Abstract

A design approach to electrically small quasi-isotropic circular sector magnetic dipole antennas is advanced. Based on the mode synthesis theory of microstrip patch antennas

the circular sector magnetic dipole evolved from the prototype dipole with asymmetric boundary conditions is studied. As is validated

electrically small size and quasi-isotropic radiation characteristics can be simultaneously achieved. A set of analytical design closed-form formulas is derived from the eigen-equation and employed to determine the key parameters of the proposed antenna. As a proof of the design approach

the circular sector magnetic dipole antenna with the flared angle of 300° is designed

bricated and measured. The antenna is excited by a sleeve choke coaxial cable and a slotted coaxial cable

respectively. It has been shown that the maximum gain variation of the proposed antenna in the total space is 6.7 dB and the radiation efficiency is 91.2%. The electrical size of the proposed antenna is

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references

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