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题名嵌入式GIS在智能交通仿真软件开发中的应用
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作者
霍莹
王慧
宋执环
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机构
浙江大学信息科学与工程学院
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出处
《江南大学学报（自然科学版）》
CAS
2006年第2期179-181,186,共4页
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文摘
以MapObjects为例,分析了嵌入式GIS控件在智能交通仿真软件中应用优势,在讨论MapObjects与智能交通仿真数据形式的基础上,提出了一种建立二次索引动态连接数据的方法,解决了嵌入式GIS对智能交通仿真数据操作问题,快速、高效地实现了智能交通系统仿真软件路网设置与数据查询.
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关键词
嵌入式地理信息系统
二次索引
智能交通仿真软件
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Keywords
embedded GIS, secondary index
its simulation software
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分类号
TP317
[自动化与计算机技术—计算机软件与理论]
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题名一种新型高阻表面光子晶体微带天线的设计
被引量：1
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作者
王灵敏
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机构
中国移动通信集团广西有限公司
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出处
《广西通信技术》
2016年第1期34-39,共6页
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文摘
高阻表面光子晶体是一种周期性介质结构,具有抑制表面波的特性.借助Rsoft bandsolve设计了一种带隙中心频率位于11.75 GHz左右的正方形单元高阻表面结构,有效带隙区间为0.50989～0.57987,带隙率为12.5％.将其应用于E形微带天线上,利用专业三维电磁仿真软件Ansoft HFSS对高阻表面微波光子晶体微带天线性能进行了整体仿真分析,采用热转印法完成了两种天线的制备,搭建测试系统测试了加载高阻表面光子晶体前后天线的回波损耗及功率,基于相关理论知识,计算出所设计天线的实际增益.结果表明,加载高阻表面光子晶体使得微带天线增益增加了1.56 dB,低背瓣辐射最大可以降低10 dB,改善了天线方向性,增强微带天线整体性能.
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关键词
微带天线
光子晶体
带隙
高阻表面
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Keywords
Keyword： High-impedance surface structure of photonic crystals is a kind of periodic dielectric structures, it can suppress the surface wave. In this paper, A mierostrip antenna based on high-impedance surface with square units of microwave photonic crystals is proposed, which works on a centre frequency of 11.75 GHz. It has an effective band gap range of 0.50989-0.57987, and its band gap rate is 12.5%. The combined high-impedance surface of microwave photonic crystals and the E type antenna can be a new type of antenna. Firstly, The performance of the new E microstrip antenna based on high-impedance surface of microwave photonic crystals are analyzed by the professional 3D electromagnetic simulation software Ansoft HFSS.Then, two antennas are prepared by thermal transfer method and return loss and power of the two kinds of antennas are tested through constructing test system.Finally, the real gain of the antenna is calculated with the aid of theoretical knowledge.The resulte shows that microstrip antenna gain increased around 0.6 dB and the maximum of low back lobe radiation reduces around 10 dB. Antenna pattern is improved. The overall performance of the antenna is improved. Microtrip Antenna
Photonic Crystals
Band-Gap
High-Impedance Surface
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分类号
TN828.6
[电子电信—信息与通信工程]
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