基于多层柔性介质的Ka波段缝隙天线设计
发布时间：2018-11-15 14:17
【摘要】：随着微波技术的不断发展,天线及其馈电网络作为雷达以及通信系统的关键部分之一,一直受到研究人员的重点关注。在阵列天线馈电网络的设计中,功率分配器(下面简称功分器)的功率与相位平衡度决定所对应天线能量的多寡,进而影响天线增益,是天线馈电网络中一个不可忽视的重要环节。本文在学习基片集成波导技术的基础之上,以缝隙天线为主要研究方向,研究并设计了缝隙天线阵列中的功率分配网络,并在其后阵列天线低副瓣设计过程中加入了微带天线阵列的对比研究,具体工作包含以下几个方面:(1)对基片集成波导(Substrate Integrated Waveguide,简称SIW)平面阵列天线以及平面贴片阵列天线进行了研究与设计。首先设计了一个以Rogers5880为板材,基于SIW的双层十六路三角分布功分器。仿真结果显示,功分器在33.5GHz至35.7GHz通带内S11小于-15d B,带内各端口损耗小于0.4d B,其余各端口的S参数曲线吻合良好,相邻端口相位相差180°,输出功率符合三角分布;然后在十六路功分器的基础上,设计了一个8×8平面缝隙阵列天线,仿真结果显示,天线在35GHz有良好的回波损耗,增益可达20d B,其副瓣电平在E面可达-28d B。(2)为了加深对低副瓣天线的设计理解,针对12单元的多边形阵列天线,设计了一个以Rogers3850为板材的12路微带功分器。该功分器在34GHz至36GHz通带内S11小于-20d B,仿真结果显示,天线在34.3GHz至35.75GHz通带内,回波损耗小于-10d B,增益可达20d B,副瓣电平在E面和H面可达-26d B。(3)基于以上两种平面阵列天线进行了柱面共形的研究和设计。文章将两种天线在半径150mm的圆柱体上进行共形,并进行了仿真。由仿真结果可以看出,天线在共形之后,二者S11均受到影响,产生一定的频率偏移。相比较而言,微带天线所受的影响比较小。在方向图方面,缝隙天线的副瓣电平有明显的增大趋势,而微带天线则表现为波瓣宽度增加,而且随着柱面曲率半径的增大,天线辐射特性呈向全向天线过渡的趋势。
[Abstract]:With the development of microwave technology, antenna and its feed network, as one of the key parts of radar and communication system, have been paid more and more attention by researchers. In the design of the antenna array feed network, the power and phase balance of the power divider (hereinafter referred to as the power divider) determines the energy of the corresponding antenna, and then affects the antenna gain. It is an important link in antenna feed network. Based on the study of substrate integrated waveguide technology and the research direction of slot antenna, the power distribution network in slot antenna array is studied and designed in this paper. A comparative study of the microstrip antenna array is introduced in the design of the low sidelobe of the rear array antenna. The specific work includes the following aspects: (1) the substrate integrated waveguide (Substrate Integrated Waveguide, SIW) Planar Array Antenna and Planar Patch Array Antenna are studied and designed. Firstly, a 16-way double-layer triangular power divider based on Rogers5880 and SIW is designed. The simulation results show that the S11 is less than -15 dB in the 33.5GHz to 35.7GHz passband, and the loss of each port in the band is less than 0.4 dB. The S-parameter curves of the other ports are in good agreement with each other, and the phase difference between the adjacent ports is 180 掳. The output power conforms to the triangular distribution; Then an 8 脳 8 planar slot array antenna is designed on the basis of 16 power dividers. The simulation results show that the antenna has good echo loss in 35GHz, and the gain can reach 20 dB. The sidelobe level can reach -28 dB on the E plane. (2) in order to better understand the design of low sidelobe antenna, a 12-channel microstrip power divider with Rogers3850 as the plate is designed for the polygonal array antenna with 12 elements. The power divider is less than -20dB in the 34GHz to 36GHz passband. The simulation results show that in the 34.3GHz to 35.75GHz passband, the echo loss is less than -10dB, and the gain can reach 20dB. The sidelobe level can reach -26dB on the E and H planes. (3) the cylindrical conformal design is carried out based on the above two planar array antennas. In this paper, two antennas are conformed on a cylinder with radius 150mm and simulated. From the simulation results, it can be seen that after the antenna is conformal, both S11 and S11 are affected, resulting in a certain frequency offset. By comparison, the microstrip antenna is less affected. In the aspect of pattern, the sidelobe level of slot antenna increases obviously, while the width of microstrip antenna increases, and with the increase of radius of curvature of cylinder, the radiation characteristic of slot antenna tends to the omnidirectional antenna.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.24
本文编号：2333539
[Abstract]:With the development of microwave technology, antenna and its feed network, as one of the key parts of radar and communication system, have been paid more and more attention by researchers. In the design of the antenna array feed network, the power and phase balance of the power divider (hereinafter referred to as the power divider) determines the energy of the corresponding antenna, and then affects the antenna gain. It is an important link in antenna feed network. Based on the study of substrate integrated waveguide technology and the research direction of slot antenna, the power distribution network in slot antenna array is studied and designed in this paper. A comparative study of the microstrip antenna array is introduced in the design of the low sidelobe of the rear array antenna. The specific work includes the following aspects: (1) the substrate integrated waveguide (Substrate Integrated Waveguide, SIW) Planar Array Antenna and Planar Patch Array Antenna are studied and designed. Firstly, a 16-way double-layer triangular power divider based on Rogers5880 and SIW is designed. The simulation results show that the S11 is less than -15 dB in the 33.5GHz to 35.7GHz passband, and the loss of each port in the band is less than 0.4 dB. The S-parameter curves of the other ports are in good agreement with each other, and the phase difference between the adjacent ports is 180 掳. The output power conforms to the triangular distribution; Then an 8 脳 8 planar slot array antenna is designed on the basis of 16 power dividers. The simulation results show that the antenna has good echo loss in 35GHz, and the gain can reach 20 dB. The sidelobe level can reach -28 dB on the E plane. (2) in order to better understand the design of low sidelobe antenna, a 12-channel microstrip power divider with Rogers3850 as the plate is designed for the polygonal array antenna with 12 elements. The power divider is less than -20dB in the 34GHz to 36GHz passband. The simulation results show that in the 34.3GHz to 35.75GHz passband, the echo loss is less than -10dB, and the gain can reach 20dB. The sidelobe level can reach -26dB on the E and H planes. (3) the cylindrical conformal design is carried out based on the above two planar array antennas. In this paper, two antennas are conformed on a cylinder with radius 150mm and simulated. From the simulation results, it can be seen that after the antenna is conformal, both S11 and S11 are affected, resulting in a certain frequency offset. By comparison, the microstrip antenna is less affected. In the aspect of pattern, the sidelobe level of slot antenna increases obviously, while the width of microstrip antenna increases, and with the increase of radius of curvature of cylinder, the radiation characteristic of slot antenna tends to the omnidirectional antenna.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.24
【共引文献】
相关期刊论文 前2条
1 钱青;洪玲伟;;C波段宽带双线极化微带天线的设计[J];硅谷;2012年04期
2 梁斌;杨娜;;一种新型高增益微带天线[J];数字通信;2009年05期
相关硕士学位论文 前10条
1 齐会颖;微带共形天线阵的方向图综合与实验研究[D];国防科学技术大学;2010年
2 钱青;宽带双极化微带天线的研究与设计[D];杭州电子科技大学;2012年
3 英正庆;集成天线的射频功率放大器的研究[D];浙江大学;2003年
4 刘宝宏;微带天线的分析和宽频带设计[D];南京理工大学;2002年
5 曾志纯;移动计算机网络中的双向功放与天线技术研究[D];武汉理工大学;2004年
6 李龙;小型宽带微带天线设计[D];南京理工大学;2004年
7 王艳丽;宽带微带天线设计与仿真技术研究[D];哈尔滨工程大学;2004年
8 姚平;高增益及低副瓣平面阵列微带天线研制[D];南京理工大学;2005年
9 韩玲;基于无线数据传输系统微带贴片天线与功率放大器的设计研究[D];中北大学;2006年
10 李南;基于时域有限差分法的集成天线设计[D];合肥工业大学;2007年
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