基于双面平行带线的全空间扫描漏波天线

王亨辉; 孙胜; 刘能武; 刘元安

doi:10.11999/JEIT230067

基于双面平行带线的全空间扫描漏波天线

doi: 10.11999/JEIT230067

1.
电子科技大学电子科学与工程学院成都 611731
2.
西安电子科技大学电子工程学院西安 710071
3.
北京邮电大学电子工程学院北京 100876

基金项目: 国家自然科学基金(61971115, 61721001)

详细信息

作者简介:
王亨辉：男，博士生，研究方向为周期结构与漏波天线设计

孙胜：男，教授，博士生导师，主要研究方向为电磁场理论与数值方法、微波毫米波理论与技术、天线理论与技术等

刘能武：男，副教授，博士生导师，主要研究方向为天线理论与技术、射频收发系统、导航定位系统等

刘元安：男，教授，博士生导师，主要研究方向为宽带移动通信技术、射频与微波器件、综合网络接入技术、移动终端与物联网等

通讯作者:
孙胜　sunsheng@uestc.edu.cn

中图分类号: TN82
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- 被引次数: 0
出版历程
- 收稿日期: 2023-02-17
- 修回日期: 2023-07-03
- 网络出版日期: 2023-07-14
- 刊出日期: 2024-02-29

Double-sided Parallel-strip Line-based Leaky-wave Antenna with Full-space Beam Scanning Property

1.
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
2.
School of Electronic Engineering, Xidian University, Xi’an 710071, China
3.
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Funds: The National Natural Science Foundation of China (61971115, 61721001)

摘要

摘要: 为了实现从后向端射到前向端射的连续波束扫描天线，该文基于双面平行带线结构提出了一种具有全空间扫描能力的漏波天线。天线单元由双面平行带线传输线和一对反向加载的开路枝节组成，两个开路枝节分别位于传输线的上导带和下导带。加载的反向开路枝节等效为一个偶极子，使得天线单元具有全向辐射性能，作为整个全空间扫描漏波天线的基础单元。为了抑制周期漏波天线中的开阻带问题，又在天线基础单元上加载了一对平衡槽以实现频率平衡条件，还加载了一对匹配槽以匹配周期结构的阻抗。最后实现了一款天线原型，经仿真与实验验证，该天线能够在7.6 GHz 到14.0 GHz的频率范围内，实现从后向端射，经侧向辐射，然后到前向端射的全空间扫描能力。
- 漏波天线 /
- 全空间波束扫描 /
- Bloch阻抗 /
- 开阻带抑制 /
- 双面平行带线
Abstract: Design investigation of a leaky-wave antenna aimed to acquire continuous beam scanning from the backfire direction to the endfire direction is presented on a Double-Sided Parallel-Strip Line (DSPSL) structure. The unit cell comprises a DSPSL structure and a pair of inverted open-ended stubs attached to the top and bottom strips, respectively. The loaded stubs act as a dipole and provide omnidirectional radiation performance, contributing to the full-space beam scanning potential of the leaky-wave antenna. To eliminate the open-stop band effect, two pairs of series slots are etched on the transmission line to meet the frequency balanced condition and match the Bloch impedance. Experiments of the designed prototype were consistent with the simulation, revealing that as the frequency varies from 7.6 GHz to 14.0 GHz, the proposed leaky-wave antenna radiates beams from the backfire direction through the broadside to the endfire direction.
- Leaky-wave antenna /
- Full-space beam scanning /
- Bloch impedance /
- Open-stop band suppression /
- Double-sided parallel-strip line

HTML全文

图 1 单波束辐射示意图

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图 2 DSPSL结构截面示意图

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图 3 漏波天线基础单元结构

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图 4 不同开路枝节长度下基础漏波单元的k₀-β图

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图 5 漏波天线改进单元结构

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图 6 初始及加载槽后的漏波单元结构及其等效电路

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图 7 初始及加载平衡槽后漏波单元的奇偶模等效电路

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图 8 归一化的相位常数与衰减常数

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图 9 漏波天线单元Bloch阻抗

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图 10 天线实物图

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图 11 仿真和实测的|S₁₁|与|S₂₁|

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图 12 仿真和实测的天线增益与辐射效率

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图 13 漏波天线H面波束扫描图

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图 14 漏波天线扫描角度与频率对应关系

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表 1 改进漏波单元尺寸参数值(mm)

参数	数值	参数	数值	参数	数值
p	9.14	w	5.0	w_s	30.0
w₁	1.5	w₂	0.4	w₃	0.3
l₁	7.0	l₂	0.7	l₃	0.68

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表 2 本文工作与已报道工作对比

文献	结构	工作频率(GHz)	侧射频率反射系数(dB)	增益范围(dBi)	天线长度(λ₀)	扫描范围(°)
[1]	Goubau线	5.5～20.0	–11	6.5～12.5	9.6	–90～65
[8]	SIW	13.2～15.6	–25	11.1～14.1	11.1	–47～37
[10]	CPS	8.65～11.70	–20	9.0～11.6	6.8	–75～83
[19]	DSPSL	1.1～5.9	–7.5	4.2～9.7	2.9	–90～90
[21]	交错平行带线	4.5～10.2	–10	7.2～11.0	6.9	–90～90
本文	SIW	7.6～14.0	–20.5	7.0～14.6	8.7	–90～90

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