文档介绍：南京航空航天大学
硕士学位论文
宽带共形航空数据链天线研究
姓名:薛鹏
申请学位级别:硕士
专业:电磁场与微波技术
指导教师:顾长青
20090101
南京航空航天大学硕士学位论文
摘要
航空数据链系统是一个复杂的通信组网系统,它充分利用软件无线电技术来提高数据交换、
战场感知以及武器互操作的能力。现代航空武器系统设计对航空数据链系统提出了高数据传输
速率、低截获概率、高抗干扰性以及对安装环境良好适应性等方面的要求,因此要求数据链天
线具有工作频带宽、易于共形安装、波束赋形的特点。由于微带天线具有成本低、性能多样、
易于安装和可低剖面共形设计等优点,因此在新型数据链天线设计中独具优势。本文数据链天
线采用了微带天线阵列的形式,主要开展了如下研究工作:
(1)针对航空数据链天线的宽频带要求,设计了一种工作于 X 波段的线极化双频结构 U
型槽天线单元,然后通过添加介质覆盖层的方式改进得到了一种带宽为 %的宽带天线单元。
(2)针对航空数据链天线易于共形安装的要求,分别分析了不同曲率情况下的典型共形安
装表面对所提出的两种天线单元电磁特性的影响。
(3)针对航空数据链天线对波束赋形的要求,研究了天线阵列馈电网络的设计方法,通
过不等功分结构和移相结构实现了天线波束的赋形,设计并分析了分别共形于圆柱表面和圆锥
表面的四元宽带 U 型槽天线阵列。

关键词:航空数据链,微带天线,共形,宽带,波束赋形
I
宽带共形航空数据链天线研究
Abstract
Airborne data-link system is working system. By utilizing
software defined radio (SDR) technology, the ability of data exchanging, battle scene sensing and
weapon mutual operating are improved greatly. In the design of modern airborne weapon system,
airborne data-link systems are usually required to have high data transmission rate, low probability of
interception, high anti-jamming performance and high flexibility of installation. Therefore, their
antennas are required to have the distinguishing feature of broad frequency band, easy to conformal
installation and shaped-beam. Microstrip antenna is superior to others in the design of novel data-link
antennas for its distinct advantages of low cost, flexible performance, ease of installation and the low
profile conformal design. So, the form of microstrip antenna array is introduced to construct the
data-link antenna in this thesis. The main achievements are as follows:
(1) According to the requirement of wideband to airborne data-link antenna, an X-band
dual-frequency U-slotted microstrip antenna with linear polarization is designed. A wideband antenna,
which relative bandwidth is about %, is optimized and then obtained by covering a dielectric
layer on the former dual-frequency antenna.
(2) According to the re