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一种双分裂环结构的线-圆和线-交叉极化转换器
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作者 杨祖宁 伍铁生 +2 位作者 王义平 曹卫平 张顺岚 《微波学报》 CSCD 北大核心 2023年第2期21-27,共7页
文中提出了一种高效、多功能的超表面极化转换器,该转换器由双分裂环谐振器周期阵列构成并置于F4B-2介电基板上。通过双分裂环谐振器的耦合效应可以有效拓展工作带宽。采用有限积分法对其极化特性进行分析。仿真结果表明:在5.5~8.55 GH... 文中提出了一种高效、多功能的超表面极化转换器,该转换器由双分裂环谐振器周期阵列构成并置于F4B-2介电基板上。通过双分裂环谐振器的耦合效应可以有效拓展工作带宽。采用有限积分法对其极化特性进行分析。仿真结果表明:在5.5~8.55 GHz的频带(相对带宽为43.4%),实现了线极化到圆极化的转换,其能量转换效率优于99.5%;在10.31~15.31 GHz的频带(相对带宽为39%),实现了线极化到其交叉极化的转换,其极化转换比大于0.99。实验上,制备了样品并测试了其极化转换特性,实验结果与仿真结果基本吻合,验证了该转换器设计的合理性和有效性。所提出的超表面具有高效率、大工作带宽、多功能的特点,可应用于无线通信和极化操控设备。 展开更多
关键词 极化转换器 超表面 线-极化 线-交叉极化 高效
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一种可以实现线-圆和线-交叉极化转换的反射型超表面 被引量:2
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作者 林小芳 张旭 孟祥辉 《高师理科学刊》 2020年第6期36-40,共5页
提出了一种可以通过反射同时实现2种不同极化形式的极化转换超表面.仿真结果表明,该超表面在频带范围14.21~16.70 GHz内可以实现比较理想的线-圆极化波的转换,并且可以在近5 GHz的频带范围(25.50~30.42 GHz)内实现线-交叉极化波的转换,... 提出了一种可以通过反射同时实现2种不同极化形式的极化转换超表面.仿真结果表明,该超表面在频带范围14.21~16.70 GHz内可以实现比较理想的线-圆极化波的转换,并且可以在近5 GHz的频带范围(25.50~30.42 GHz)内实现线-交叉极化波的转换,且极化转换率的均值高达97%左右.该极化转换超表面在毫米波雷达、天线设计等军事领域具有广泛的应用价值. 展开更多
关键词 超表面 线-极化转换 线-交叉极化转换
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Polarization Projection for 3D Geometry-Based Stochastic Channel Model
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作者 PANG Lihua ZHANG Yang +5 位作者 GONG Fengkui WANG Anyi XIAO Liyuan LIANG Xiao WANG Qiaofeng LI Jiandong 《China Communications》 SCIE CSCD 2015年第10期52-63,共12页
Comprehensive radiation characteristics of polarized antenna are crucial in creating practical channel coefficients for next generation wireless communication system designs.Being currently supported within3 D geometr... Comprehensive radiation characteristics of polarized antenna are crucial in creating practical channel coefficients for next generation wireless communication system designs.Being currently supported within3 D geometry-based stochastic channel models(GSCM),field patterns are technically obtained by chamber measurement(or by its best fitting).However,in some channel related performance analysis scenarios,design insight can be crystallized better by starting the derivations with theoretical co-polarization and cross-polarization components.Specifically,these two components are mathematically linked with field patterns through the proposed polarization projection algorithm.In this manuscript,we focus on revealing the transformation criterion of polarization states between the antenna plane and the propagation plane.In practice,it makes retrieving the field patterns by electromagnetic computation possible.Meanwhile,the impact imposed by distinct antenna orientations is geometrically illustrated and consequently incorporated into the proposed algorithm.This will further facilitate flexible performance evaluation of related radio transmission technologies.Our conclusions are verified by the closed-form expression of the dipole field pattern(via an analytical approach) and by chamber measurement results.Moreover,we find that its 2D degenerative case is aligned with the definitions in 3^(rd) generation partnership project(3GPP)technical report 25.996.The most obvious benefit of the proposed algorithm is to significantly reduce the cost on generating channel coefficients in GSCM simulation. 展开更多
关键词 polarization 3D geometry-based stochastic channel model antenna orientation radiation characteristics dipole chamber measurement channel simulation
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