A Low-Profile, Ultra-Wideband, Low Cross-Polarization Tightly Coupled Dipole Array

GENG Yuan; PAN Jin; WANG Ling-xiao; LIU Si-hao; LIU Yan-hui; YANG De-qiang

doi:10.12263/DZXB.20251010

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A Low-Profile, Ultra-Wideband, Low Cross-Polarization Tightly Coupled Dipole Array

PAPERS | 更新时间：2026-04-24

- A Low-Profile, Ultra-Wideband, Low Cross-Polarization Tightly Coupled Dipole Array
- ACTA ELECTRONICA SINICA Vol. 53, Issue 12, Pages: 4607-4613(2025)
- 作者机构：
  
  电子科技大学电子科学与工程学院，四川成都 611731
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(U2341208)
- DOI：10.12263/DZXB.20251010
  CLC： TN821;
- Received：24 November 2025，
  
  Accepted：15 December 2025，
  
  Published：25 December 2025
- 稿件说明：
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耿源, 潘锦, 王凌霄, 等. 一款低剖面超宽带低交叉极化紧耦合阵列[J]. 电子学报, 2025, 53(12): 4607-4613.

GENG Yuan, PAN Jin, WANG Ling-xiao, et al. A Low-Profile, Ultra-Wideband, Low Cross-Polarization Tightly Coupled Dipole Array[J]. Acta Electronica Sinica, 2025, 53(12): 4607-4613.
耿源, 潘锦, 王凌霄, 等. 一款低剖面超宽带低交叉极化紧耦合阵列[J]. 电子学报, 2025, 53(12): 4607-4613. DOI：10.12263/DZXB.20251010

GENG Yuan, PAN Jin, WANG Ling-xiao, et al. A Low-Profile, Ultra-Wideband, Low Cross-Polarization Tightly Coupled Dipole Array[J]. Acta Electronica Sinica, 2025, 53(12): 4607-4613. DOI：10.12263/DZXB.20251010

摘要

本文提出了一款低剖面超宽带低交叉极化紧耦合阵列.传统的紧耦合阵列通常会以牺牲阵列剖面高度的方式来扩展带宽.为了在不增剖面高度的情况下扩展紧耦合阵列的低频带宽，在低频引入一种可以等效为磁偶极子的电流环辐射模式.通过仿真分析可以发现Double-Y并非在所有频段都能实现良好的平衡变换，而非平衡馈电将会导致馈电网络中出现净垂直电流，通过利用Double-Y巴伦在低频为非平衡馈电的特性，让低频出现的净垂直电流驱动由偶极子、Double-Y巴伦、短路探针和地板形成的电流环.而且这种可以等效为磁偶极子电流环，可以实现有效辐射.因此，这一设计改善了阵列的低频带宽，也相当于降低了阵列剖面.紧耦合阵列中的传统宽角度阻抗匹配层作用通常相对单一，一般仅用来改善阵列的阻抗匹配和扫描能力.然而，本文提出了一款多功能宽角度阻抗匹配层.通过将超表面和极化栅格进行融合设计，宽角度阻抗匹配层不仅保留了原有改善阵列阻抗匹配和扫描能力的功能，而且可以改善阵列的交叉极化.最终，提出的阵列实现了电压驻波比（Voltage Standing Wave Ratio，VSWR）小于3时5∶1的带宽（0.8~4 GHz）和E面45°/H面45°的扫描.而且阵列的剖面高度为0.089个低频波长，阵列E面45°/H面45°扫描时交叉极化分别小于-54 dB和-30 dB. 为了验证该设计，制作了一个10 × 10的紧耦合阵列.

Abstract

This paper proposes a low-profile

ultra-wideband

low-cross-polarization tightly coupled dipole array. Traditional tightly coupled dipole arrays typically expand bandwidth at the expense of arrays profile height. To extend the low-frequency bandwidth of the tightly coupled dipole array without increasing profile height

a current loop radiation mode equivalent to a magnetic dipole is introduced at low frequencies. Simulation analysis reveals that the Double-Y configuration does not achieve optimal balanced transformati

on across all frequency bands. Non-balanced feeding introduces net vertical currents within the feed network. By leveraging the Double-Y balun’s inherent non-balanced feeding characteristics at low frequencies

the net vertical currents drive a current loop formed by the dipole

Double-Y balun

shorted probe

and ground plane. Moreover

this current loop

equivalent to a magnetic dipole

enables effective radiation. Consequently

this design enhances the array’s low-frequency bandwidth while simultaneously reducing the array’s profile. Traditional wide-angle impedance matching layers in TCDAs serve a relatively singular purpose

typically employed solely to enhance array impedance matching and scanning capability. However

this paper proposes a multifunctional wide-angle impedance matching layer. By integrating a metasurface with a polarization grid

the wide-angle impedance matching layer not only retains its original functions of improving array impedance matching and scanning capability but also enhances the array’s cross-polarization performance. Ultimately

the proposed array achieves a 5:1 bandwidth (0.8~4 GHz) with a voltage standing wave ratio (VSWR)

alongside scanning capabilities of 45° in the E-/H-plane. Moreover

with a profile of 0.089

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=106760645&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=106760635&type=

1.52400005

2.28600001

low

where

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=106760637&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=106760668&type=

1.52400005

2.28600001

low

is the wavelength at the lowest operating frequency. The array exhibits cross-polarization levels below -54 dB/-30 dB for E- /H-plane 45°scanning. To validate this design

a 10 × 10 tightly coupled array was fabricated.

关键词

Keywords

references

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Related Institution

The School of Electronic Science and Engineering, University of Electronic Science and Technology of China (UESTC)

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