机载双频共口径宽波束圆极化天线设计

doi:10.3969/j.issn.1001-2400.2017.02.010

西安电子科技大学学报

机载双频共口径宽波束圆极化天线设计

江莉1;蒋东2;张福顺1

(1. 西安电子科技大学天线与微波技术重点实验室，陕西西安 710071;
2. 中国西南电子技术研究所，四川成都 610036)

收稿日期:2016-03-10 出版日期:2017-04-20 发布日期:2017-05-26
作者简介:江莉(1990-)，女，西安电子科技大学博士研究生，E-mail:swa__llow@163.com
基金资助:
中国电子科技集团第10研究所基金资助项目(CETC10-F1)

Design of dual-band shared-aperture circularly polarized antenna with a wide beam for aircraft platforms

JIANG Li1;JIANG Dong2;ZHANG Fushun1

(1. Science and Technology on Antennas and Microwave Lab., Xidian Univ., Xi'an 710071, China;
2. No. 10 Research Institute, China Electronics Technology Group Corporation, Chengdu 610036, China)

Received:2016-03-10 Online:2017-04-20 Published:2017-05-26

摘要/Abstract

摘要：

现有的共口径天线一般关注多频多极化的天线性能，但剖面较高、结构复杂．笔者提出了一种结构简单、波束覆盖范围宽的双频共口径圆极化天线．该天线采用微带天线叠层技术加高介电常数介质基板实现了双频段4个频点的天线共用一个口径，达到降低天线体积和重量的目的；该天线的4个工作频点均可由对应的物理尺寸自由调节．通过在微带天线上加载高介电常数介质板，提高了天线在低仰角方向的增益，展宽了天线波束．设计并采用了宽带功分移相网络加耦合馈电的方法实现4个频段的圆极化特性．天线各频段实测的阻抗带宽、轴比和方向图都与仿真结果吻合良好，该天线的设计方法可以推广应用于实现更多频段的共口径天线设计．

关键词: 双频段, 宽波束, 共口径

Abstract:

Most of published shared-antennas focus mainly on the characteristics of multi-band and multi-polarization, that is, a high profile and a complex structure. A dual-band circularly polarized shared-antenna is presented with a simple structure and wide beam coverage. Firstly, to reduce the size and weight, the shared-aperture antenna is applied for the quad-operating frequencies (UHF1/UHF2/S1/S2) with a stacked microstrip patch antenna and high dielectric constant substrates. All the quad-operating bands can be freely tuned by changing the lengths of patches. Secondly, the substrate with a high dielectric constant is added on the patch to improve the gain of the antenna in the low elevation direction, broadening the antenna beam. Next, to obtain the quad-band circularly polarization (CP) radiation pattern, the feeding structure with the broadband phase shifter is also designed. Finally, the proposed antenna prototype is fabricated and measured. Its measured impedance bandwidth, axial ratio and radiation pattern are in good agreement with simulation results. The proposed antenna has already been applied to a special airborne communication system. Additionally, the antenna synthesis method may be further extended to realize the shared-aperture circularly polarized antenna with more than two bands.

Key words: dual-band, wide beam, shared-aperture

江莉;蒋东;张福顺. 机载双频共口径宽波束圆极化天线设计[J]. 西安电子科技大学学报, 2017, 44(2): 52-56.

JIANG Li;JIANG Dong;ZHANG Fushun. Design of dual-band shared-aperture circularly polarized antenna with a wide beam for aircraft platforms[J]. Journal of Xidian University, 2017, 44(2): 52-56.

参考文献

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机载双频共口径宽波束圆极化天线设计

Design of dual-band shared-aperture circularly polarized antenna with a wide beam for aircraft platforms

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