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High-Efficiency Circularly Polarized Phased Array Based on 5 μm-Thick Nematic Liquid Crystals: Design Article

Xin Yu Wu,Fengshuo Wan,Hongyuan Feng,Shichao Jin,Chong Guo,Yu Wei,Dunge Liu,Yuqian Yang,Longzhu Cai,Zhi Hao Jiang,Wei Hong

Engineering 2024, Volume 32, Issue 1,   Pages 70-82 doi: 10.1016/j.eng.2023.08.013

Abstract:

This paper presents a systematic investigation and demonstration of a K-band circularly polarizedThe LCPA contains 16 phase-shifting radiating channels, each consisting of a circularly polarized stackedmanufactured and characterized with a total profile of only 1.76 mm, experimentally demonstrating a scanned circularlypolarized beam from −40° to +40° with a measured peak gain of 12.5 dBic and a scanningThe use of the demonstrated low-profile LCPA to support circularly polarized scanning beams, along with

Keywords： Circularly polarized     Liquid crystal     Liquid-crystal-based phased array (LCPA)     Phase shifter     Over-the-air    

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Analysis and design of novel wideband and high efficiency millimeter-wave antenna arrays for 60-GHz applications Research Articles

Kai-lai WU, Yuan YAO, Xiao-he CHENG, Jun-sheng YU, Tao YU, Xiao-dong CHEN

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 1,   Pages 128-143 doi: 10.1631/FITEE.1900461

Abstract: The antenna array can be adjusted to be linearly or circularly polarized by simply changing the radiationFor the linearly polarized antenna array, simulation results show that the impedance bandwidth of theSimulation results of the 8×8 linearly polarized antenna array show a bandwidth of 21.6% and a gain ofFor the 8×8 circularly polarized antenna array, simulation results show that an impedance bandwidth of

Keywords： 60 GHz     Antenna array     Linearly polarized     Circularly polarized     Millimeter-wave    

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Wideband and high-gain BeiDou antenna with a sequential feed network for satellite tracking Research Article

Zhuolin DENG, Zhongyu TIAN, Chenhe DUAN, Pei XIAO, Zhu LIU, Gaosheng LI,Gaosheng7070@vip.163.com

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 10,   Pages 1471-1481 doi: 10.1631/FITEE.2200244

Abstract: In this paper, we propose a wideband circularly polarized high-performance .

Keywords： BeiDou antenna     Wideband circularly polarized radiation     Four-port sequential feed network     Global navigation    

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Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation Correspondence

Yuyan CAO, Zijun GUO, Zhangcheng HAO

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 10,   Pages 1568-1578 doi: 10.1631/FITEE.2200122

Abstract:

A planar millimeter-wave shared-aperture array antenna is proposed and designed in this paper. By composing the substrate integrated waveguide (SIW) and the stripline, the K-band antenna is embedded inside the Ka-band antenna to achieve a smaller size and a low profile by sharing an aperture. The Ka-band antenna radiates through the parallel slot pairs on the surface of the SIW cavities with horizontal polarization, while the K-band antenna radiates through the butterfly-shaped slots with vertical polarization, which are also designed on the surface. Then the two array antennas can radiate by sharing a common aperture with high isolation. To verify this idea, a prototype of an 8×8 shared-aperture array antenna has been designed with center frequencies of 19 and 30 GHz and fabricated using multilayer printed circuit board (PCB) technology. The measurement results show that the −10 dB impedance bandwidths in the K- and Ka-bands are 7.73% and >20%, and the corresponding isolations are higher than 60 and 44 dB, respectively. The proposed shared-aperture antenna has a small footprint, a low profile, and high isolation, and is a promising candidate to design compact millimeterwave wireless systems.

Keywords： 共口径；平面天线；高隔离度；基片集成波导    

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Grazing incidence polarized light imaging of footwear prints Regular Article

Xin-yi Bi, Rui-fang Han, Ran Liao, Wu-sheng Feng, Da Li, Xue-jie Zhang, Hui Ma,liao.ran@sz.tsinghua.edu.cn

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 11,   Pages 1543-1550 doi: 10.1631/FITEE.1800383

Abstract: The current work shows that grazing incidence polarized light imaging can effectively enhance the contrast

Keywords： 偏振；图像增强；散射；粒子    

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A dual-polarized Fabry–Pérot antenna with high gain and wide bandwidth for millimeter-wave applications

Qingyi Guo, Hang Wong,guo_qingyi@163.com,hang.wong@cityu.edu.hk

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4,   Pages 599-608 doi: 10.1631/FITEE.2000514

Abstract: We introduce a dual-polarized (DP) rot cavity (FPC) antenna operating at the millimeter-wave (mmWave)

Keywords： 双极化；法布里—珀罗腔天线；与菲涅耳带透镜集成的部分反射面；毫米波波段；高增益；宽带    

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Critical technique and scientific topic on fully polarized microwave radiometer remote sensing sea surface

Wang Zhenzhan,Jiang Jingshan,Liu Jingyi,Yin Xiaobin

Strategic Study of CAE 2008, Volume 10, Issue 6,   Pages 76-86

Abstract:

Microwave microwave polarimeter is a sensor of measuring not only the vertical-and horizontal-polarization, but also the third and/or the forth Stokes parameters. It realizes all information about electromagnetic wave, including frequency, phase, amplitude and polarization,to be measured by a senor. The correlated information of the first two Stokes parameters is more sensitive to the anisotropy of the ocean surface. Wind direction retrieval is one of the initial motivations of the polarimeter development. In this paper, the progress and characteristic on polarimeter development are introduced and theories of ocean wind vector remote sensing are analyzed. Oceanic emission and scattering model is develoked for remote sensing wind vector using passive polarimetric microwave radiometer. The critical techniques on its system design, which include receiver and calibration methods, are discussed in order to realize scientific target of wind retrievals. Furthermore more efforts are paid on expatiating scientific topics on wind reversion methods, including geophysical model function built-up, influences of main technical specifications on retrieval precision, and wind direction ambiguity removal methods by data-processing methods and scanning geometry. The calibration errors and main specifications of polarimetric radiometer,which have significant influences on the accuracy of wind vector retrieval,are summed in detail.Finally,a new scanning geometry with fore-aft-look to remove wind direction ambiguous solution is put forward.

Keywords： polarimetric microwave radiometer     wind vector retrieval     calibration    

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Wideband circular-polarized transmitarray for generating a high-purity vortex beam Correspondence

Liangjie QIU, Xiuping LI, Zihang QI, Wenyu ZHAO, Yuhan HUANG,xpli@bupt.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 6,   Pages 927-934 doi: 10.1631/FITEE.2200539

Abstract: In this correspondence, a wideband circular-polarized (CP) transmitarray (TA) in the Ka-band is presented

Keywords： 轨道角动量；涡旋波束；透射阵；宽带；高纯度    

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Title Author Date Type Operation

High-Efficiency Circularly Polarized Phased Array Based on 5 μm-Thick Nematic Liquid Crystals: Design

Xin Yu Wu,Fengshuo Wan,Hongyuan Feng,Shichao Jin,Chong Guo,Yu Wei,Dunge Liu,Yuqian Yang,Longzhu Cai,Zhi Hao Jiang,Wei Hong

Journal Article

Analysis and design of novel wideband and high efficiency millimeter-wave antenna arrays for 60-GHz applications

Kai-lai WU, Yuan YAO, Xiao-he CHENG, Jun-sheng YU, Tao YU, Xiao-dong CHEN

Journal Article

Wideband and high-gain BeiDou antenna with a sequential feed network for satellite tracking

Zhuolin DENG, Zhongyu TIAN, Chenhe DUAN, Pei XIAO, Zhu LIU, Gaosheng LI,Gaosheng7070@vip.163.com

Journal Article

Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation

Yuyan CAO, Zijun GUO, Zhangcheng HAO

Journal Article

Grazing incidence polarized light imaging of footwear prints

Xin-yi Bi, Rui-fang Han, Ran Liao, Wu-sheng Feng, Da Li, Xue-jie Zhang, Hui Ma,liao.ran@sz.tsinghua.edu.cn

Journal Article

A dual-polarized Fabry–Pérot antenna with high gain and wide bandwidth for millimeter-wave applications

Qingyi Guo, Hang Wong,guo_qingyi@163.com,hang.wong@cityu.edu.hk

Journal Article

Critical technique and scientific topic on fully polarized microwave radiometer remote sensing sea surface

Wang Zhenzhan,Jiang Jingshan,Liu Jingyi,Yin Xiaobin

Journal Article

Wideband circular-polarized transmitarray for generating a high-purity vortex beam

Liangjie QIU, Xiuping LI, Zihang QI, Wenyu ZHAO, Yuhan HUANG,xpli@bupt.edu.cn

Journal Article