工业物联网是第六代移动通信技术(6th Generation Mobile Communication Technology,6G)的典型应用场景,工业环境无线信道特性是构建工业物联网应用的基础。本文基于射线追踪技术,研究三类典型工业环境(车间工厂、食品工厂、仓库工厂)在...工业物联网是第六代移动通信技术(6th Generation Mobile Communication Technology,6G)的典型应用场景,工业环境无线信道特性是构建工业物联网应用的基础。本文基于射线追踪技术,研究三类典型工业环境(车间工厂、食品工厂、仓库工厂)在28GHz频段的信道特性。研究结果表明不同工业环境的路径损耗特性相差较大,本文对差异的产生原因进行了阐述,还对比了视距与非视距情况下的均方根时延扩展特性。本文研究结果可以为室内多场景下28GHz信道特性的建模与研究提供帮助。展开更多
This research presents a compact,high-gain millimeter-wave antenna tailored for reliable 5 G communication in high-speed railway environments.The proposed antenna supports dual-band operation at 28 GHz(n257/n258)and 3...This research presents a compact,high-gain millimeter-wave antenna tailored for reliable 5 G communication in high-speed railway environments.The proposed antenna supports dual-band operation at 28 GHz(n257/n258)and 38 GHz(n260),enabling robust Vehicle-to-Infrastructure(V2I)links required for next-generation railway systems.The radiator occupies only 12 mm×8mm on a Rogers 6010LM substrate(ε_(r)=10.2,h=0.64 mm).A Metallic Ground-Backing(MGB)reflector,positioned 9mm behind the patch—λ/4 at 28 GHz—enhances forward radiation,suppresses back-lobes,and ensures highly directional coverage along railway tracks.The antenna achieves measured peak gains of 7.96 dBi at 28 GHz and 8.20 dBi at 38 GHz,with excellent impedance matching and stable radiation patterns under mobility scenarios.Its unique combination of compact footprint,reflectoraided gain enhancement,and stable dual-band performance under dynamic conditions distinguishes it from conventional millimeter-wave solutions,making it a strong candidate for 5G-based high-speed railway communication modules and arrays.展开更多
This paper presents the design and characterization of a via free planar single turn helix for 28 GHz broadband applications.The proposed antenna is designed using ROGERS RO4003 material,having a simple structure and ...This paper presents the design and characterization of a via free planar single turn helix for 28 GHz broadband applications.The proposed antenna is designed using ROGERS RO4003 material,having a simple structure and end-fire radiation pattern.The antenna comprises of a compact dimension of 1.36λ_(0)×0.9λ_(0) with a thickness of 0.0189λ_(0)(whereλ_(0) is the free-space wavelength at the central frequency of 28 GHz).Parametric study has been carried out to investigate the impact of key design parameters and to achieve an optimum design.Results show a good agreement between the simulated and measured results.A single turn helical inspired antenna covers−10 dB impedance bandwidth of 26.25-30.14 GHz having a peak gain of 5.83 dB and radiation efficiency up to 85%.Moreover,linear array configurations with 2 and 4 elements have been analyzed for applications with higher gain and space constraints.Presented array configurations are suitable for applications having space constraints in one dimension.Results show that peak gain up to 8.2 dB and 11.1 dB can be achieved with 2 and 4 elements,respectively.Due to its simple planar and via free structure,this antenna is suitable for 5G communications and for sensing,imaging,IoT and tracking applications at 28 GHz band spectrum.展开更多
This article presents a novel modified chuck wagon dinner bell shaped millimeter wave(mm-wave)antenna at 28 GHz.The proposed design has ultra-thin Rogers 5880 substrate with relative permittivity of 2.2.The design con...This article presents a novel modified chuck wagon dinner bell shaped millimeter wave(mm-wave)antenna at 28 GHz.The proposed design has ultra-thin Rogers 5880 substrate with relative permittivity of 2.2.The design consists of T shaped resonating elements and two open ended side stubs.The desired 28 GHz frequency response is achieved by careful parametric modeling of the proposed structure.The maximum achieved single element gain at the desired resonance frequency is 3.45 dBi.The efficiency of the proposed design over the operating band is more than 88%.The impedance bandwidth achieved for−10 dB reference value is nearly 2.9 GHz.The proposed antenna is transformed into four element linear array which increases the gain up to 10.5 dBi.The fabricated prototype is tested for the measured results.It is observed that measured results closely match the simulated results.By considering its simple structure and focused radiation patterns,the proposed design is well suited for IoT(Internet of Things),mmWave microwave sensing,5G and future RF(Radio Frequency)frontends.展开更多
针对现有毫米波信道模型验证方法缺乏系统化流程、验证指标单一、模型偏差识别精度不足等问题,提出一种基于实测数据驱动的信道模型性能验证方法。该方法通过多场景实测数据采集构建验证数据库,运用改进最大似然估计算法提取路径损耗与...针对现有毫米波信道模型验证方法缺乏系统化流程、验证指标单一、模型偏差识别精度不足等问题,提出一种基于实测数据驱动的信道模型性能验证方法。该方法通过多场景实测数据采集构建验证数据库,运用改进最大似然估计算法提取路径损耗与时延扩展等关键信道特征参数,结合均方根误差(Root Mean Square Error,RMSE)与相关系数双重指标实现模型性能定量评估。在28 GHz频段城市微蜂窝环境下的实验结果表明,该方法模型验证准确率达96.2%,与传统单指标验证方法相比具有更好的应用效果。展开更多
文摘工业物联网是第六代移动通信技术(6th Generation Mobile Communication Technology,6G)的典型应用场景,工业环境无线信道特性是构建工业物联网应用的基础。本文基于射线追踪技术,研究三类典型工业环境(车间工厂、食品工厂、仓库工厂)在28GHz频段的信道特性。研究结果表明不同工业环境的路径损耗特性相差较大,本文对差异的产生原因进行了阐述,还对比了视距与非视距情况下的均方根时延扩展特性。本文研究结果可以为室内多场景下28GHz信道特性的建模与研究提供帮助。
文摘This research presents a compact,high-gain millimeter-wave antenna tailored for reliable 5 G communication in high-speed railway environments.The proposed antenna supports dual-band operation at 28 GHz(n257/n258)and 38 GHz(n260),enabling robust Vehicle-to-Infrastructure(V2I)links required for next-generation railway systems.The radiator occupies only 12 mm×8mm on a Rogers 6010LM substrate(ε_(r)=10.2,h=0.64 mm).A Metallic Ground-Backing(MGB)reflector,positioned 9mm behind the patch—λ/4 at 28 GHz—enhances forward radiation,suppresses back-lobes,and ensures highly directional coverage along railway tracks.The antenna achieves measured peak gains of 7.96 dBi at 28 GHz and 8.20 dBi at 38 GHz,with excellent impedance matching and stable radiation patterns under mobility scenarios.Its unique combination of compact footprint,reflectoraided gain enhancement,and stable dual-band performance under dynamic conditions distinguishes it from conventional millimeter-wave solutions,making it a strong candidate for 5G-based high-speed railway communication modules and arrays.
文摘This paper presents the design and characterization of a via free planar single turn helix for 28 GHz broadband applications.The proposed antenna is designed using ROGERS RO4003 material,having a simple structure and end-fire radiation pattern.The antenna comprises of a compact dimension of 1.36λ_(0)×0.9λ_(0) with a thickness of 0.0189λ_(0)(whereλ_(0) is the free-space wavelength at the central frequency of 28 GHz).Parametric study has been carried out to investigate the impact of key design parameters and to achieve an optimum design.Results show a good agreement between the simulated and measured results.A single turn helical inspired antenna covers−10 dB impedance bandwidth of 26.25-30.14 GHz having a peak gain of 5.83 dB and radiation efficiency up to 85%.Moreover,linear array configurations with 2 and 4 elements have been analyzed for applications with higher gain and space constraints.Presented array configurations are suitable for applications having space constraints in one dimension.Results show that peak gain up to 8.2 dB and 11.1 dB can be achieved with 2 and 4 elements,respectively.Due to its simple planar and via free structure,this antenna is suitable for 5G communications and for sensing,imaging,IoT and tracking applications at 28 GHz band spectrum.
文摘This article presents a novel modified chuck wagon dinner bell shaped millimeter wave(mm-wave)antenna at 28 GHz.The proposed design has ultra-thin Rogers 5880 substrate with relative permittivity of 2.2.The design consists of T shaped resonating elements and two open ended side stubs.The desired 28 GHz frequency response is achieved by careful parametric modeling of the proposed structure.The maximum achieved single element gain at the desired resonance frequency is 3.45 dBi.The efficiency of the proposed design over the operating band is more than 88%.The impedance bandwidth achieved for−10 dB reference value is nearly 2.9 GHz.The proposed antenna is transformed into four element linear array which increases the gain up to 10.5 dBi.The fabricated prototype is tested for the measured results.It is observed that measured results closely match the simulated results.By considering its simple structure and focused radiation patterns,the proposed design is well suited for IoT(Internet of Things),mmWave microwave sensing,5G and future RF(Radio Frequency)frontends.
文摘针对现有毫米波信道模型验证方法缺乏系统化流程、验证指标单一、模型偏差识别精度不足等问题,提出一种基于实测数据驱动的信道模型性能验证方法。该方法通过多场景实测数据采集构建验证数据库,运用改进最大似然估计算法提取路径损耗与时延扩展等关键信道特征参数,结合均方根误差(Root Mean Square Error,RMSE)与相关系数双重指标实现模型性能定量评估。在28 GHz频段城市微蜂窝环境下的实验结果表明,该方法模型验证准确率达96.2%,与传统单指标验证方法相比具有更好的应用效果。
