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2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)最新文献

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A Wideband Circularly Polarized Graphene Reflectarray 一种宽带圆极化石墨烯反射阵列
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887914
Songcen Wang, Bin Wei, Li Deng
{"title":"A Wideband Circularly Polarized Graphene Reflectarray","authors":"Songcen Wang, Bin Wei, Li Deng","doi":"10.1109/iWEM.2019.8887914","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887914","url":null,"abstract":"We propose a high gain and wideband THz circularly polarized (CP) graphene reflectarray in this work. This reflectarray is make up of a THz CP horn antenna and a metasurface which is based on graphene. The unit-cell of the proposed metasurface can realize a reflection phase coverage of 360°by rotating. Simulations show that the proposed reflectarray can achieve stable high gain across the 1.4 THz ~1.7 THz band. The radiation characteristics of this CP reflectarray indicate that this reflectarray can be chosen as a good candidate for the THz applications.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116983402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Liquid-Crystal-Based Reconfigurable Holographic Metamaterial Antenna with Stable Phase Center 具有稳定相位中心的液晶可重构全息超材料天线
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887892
Bang-Jun Che, Yan-Min Cheng, Yue-Long Lyu, F. Meng, Qun Wu
{"title":"Liquid-Crystal-Based Reconfigurable Holographic Metamaterial Antenna with Stable Phase Center","authors":"Bang-Jun Che, Yan-Min Cheng, Yue-Long Lyu, F. Meng, Qun Wu","doi":"10.1109/iWEM.2019.8887892","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887892","url":null,"abstract":"In this paper, a novel reconfigurable holographic metamaterial antenna (RHMA) based on electrically controlled liquid crystal (LC) is proposed. A novel unit cell is designed, and the resulting antenna presents a large beam scanning range rising from −62.7° to +59.7°. Moreover, method to obtain stable phase center (PC) is presented. The simulation results demonstrate that the variation in PC is significantly suppressed based on the proposed method. The proposed antenna is a good candidate for the satellite communication.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129869868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Flexible Directional Antenna for 5G Millimeter-wave Applications 5G毫米波应用的柔性定向天线
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887870
Jifa Zhang, Xianju Liu, Yangyang Xu, Shuqi Huang, Weihua Zong
{"title":"A Flexible Directional Antenna for 5G Millimeter-wave Applications","authors":"Jifa Zhang, Xianju Liu, Yangyang Xu, Shuqi Huang, Weihua Zong","doi":"10.1109/iWEM.2019.8887870","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887870","url":null,"abstract":"This paper proposes a new flexible antenna. The antenna is a microstrip antenna printed on the Rogers 5880 substrate with dimensions of $mathbf{12.25 mm times 7.45 mm times 0.07 mm}$. Simulated bandwidth is 24.6–24.7GHz. The antenna has a directional pattern with maximum gain of 6.16dBi.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"64 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129587277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation of A Compressed Flat Lens Antenna Filled With Impedance Surface Units 填充阻抗面单元的压缩平面透镜天线的仿真
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887924
Meilin Yu, Yonghong Zhou
{"title":"Simulation of A Compressed Flat Lens Antenna Filled With Impedance Surface Units","authors":"Meilin Yu, Yonghong Zhou","doi":"10.1109/iWEM.2019.8887924","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887924","url":null,"abstract":"Using a convex lens is a popular way to improve an antenna's directivity, but the lens is usually thick and heavy. In this paper, through the improved discrete transform electro magnetics method, a 2-D flat lens can be obtained by compressing the 2-D convex lens, the thick is reduced by near 50%, besides the compressed lens can be filled with impedance Surface units. The simple reflector are used to make the electromagnetic wave pass through the compressed lens. The simulated data indicate that the flat lens has similar phase adjustment performance with the convex lens. As a result, compared with an antenna without the flat lens, a gain enhancement of 2.5 dB is achieved.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130633496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wireless Radio Antenna Design for Smart Float 智能浮子无线天线设计
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887864
S. Xu, Tingting Lv
{"title":"Wireless Radio Antenna Design for Smart Float","authors":"S. Xu, Tingting Lv","doi":"10.1109/iWEM.2019.8887864","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887864","url":null,"abstract":"In this paper, the wireless radio antenna used for deep sea smart float communication is designed. Because the wireless antenna purchased is patch antenna, it cannot be used in deep sea. By vulcanizing rubber outside the patch antenna, a wireless deep-sea antenna with stable performance and long distance communication is developed. The antenna's overall structure has the characteristics of pressure resistance, good air tightness and corrosion resistance, so that the antenna can meet the harsh working environment in deep sea.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"117 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131544492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Probe Antenna Using Coaxial Cable 同轴电缆探头天线
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887871
Hibiki Hamaguchi, R. Kuse, T. Fukusako
{"title":"An Probe Antenna Using Coaxial Cable","authors":"Hibiki Hamaguchi, R. Kuse, T. Fukusako","doi":"10.1109/iWEM.2019.8887871","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887871","url":null,"abstract":"Sensor antenna is an interesting concept for nondestructive testing. For example, we can observe the stats of reinforced concrete (RC) in buildings. However, if the concrete gets moisture by rain and so on, the quality of concrete will deteriorate. To avoid this, we have to regularly monitor the quality of the concrete. When a concrete gets wet, the resonant frequency of a sensor antenna having a probe in the concrete shifts lower. In this paper, the authors propose a sensing probe to be inserted into the concrete, which is used with an interfacing antenna on the concrete surface. The resonance frequency of proposed probe part changes from 0.98 GHz to 1.04 GHz.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133345934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Human Being Detection Utilizing Wavelet Transform: an Advanced Algorithm of Time Window Selection 基于小波变换的人体检测:一种先进的时间窗选择算法
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887869
Farnaz Mahmoudi Shikhsarmast, Tingting Lyu, Hao Zhang
{"title":"Human Being Detection Utilizing Wavelet Transform: an Advanced Algorithm of Time Window Selection","authors":"Farnaz Mahmoudi Shikhsarmast, Tingting Lyu, Hao Zhang","doi":"10.1109/iWEM.2019.8887869","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887869","url":null,"abstract":"This research studies on vital signs (VS) like detection the motion of human respiration of via an impulse ultra-wideband (UWB) through-wall radar with a further responsive algorithm in order to remove clutter, de-noising and random-noise. betterment of the signal-to-noise ratio (SNR) of these VS signals gained utilizing one filter. Apply the wavelet packet analysis, the standard deviation based spectral kurtosis is signed up to study the signal characteristics to impart the distance calculate among the radar and alive object. The data size moderation with regard to a defined region of interest (RDI) rises the system efficiency. The frequency of respiration is estimated by a multiple time window selection algorithm. demonstrated experimental finding points to the superior efficacy and reliability of this technique. The proposed technique showed clear VS calculation than existing methods in the literature.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134268628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of a Compact Conformal Circularly Polarized Rectenna 紧凑型共形圆极化整流天线的设计
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887891
Lei Zhang, Wenmei Zhang, Xinwei Chen
{"title":"Design of a Compact Conformal Circularly Polarized Rectenna","authors":"Lei Zhang, Wenmei Zhang, Xinwei Chen","doi":"10.1109/iWEM.2019.8887891","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887891","url":null,"abstract":"This paper designs a compact conformal circularly polarized rectenna operating at Wi-Fi band for RF energy harvesting. In order to obtain a comparatively compact layout, an annular slot antenna and a rectifying circuit are placed on two sides of the same substrate. The The inner circular metal of the annular slot serves as ground plane of the rectifying circuit. Thus, the entire rectenna has a fairly small size of $55times 55times 0.254 mathrm{mm}^{3}$. Moreover, the rectenna is conformal with a cylindrical carrier. The results shows that slot antenna has the − 10dB impedance bandwidth band of 17.8% and 3-dB AR bandwidth of 8.2%. The efficiencies of rectifier are greater than 50% for the Wi-Fi band at the input power of −10 dBm and the rectifier has maximum efficiency of 65% at the input power of −4 dBm (2.45GHz)","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"269 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133944734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Circularly Polarized Omni-Directional Antenna for Ka Band Ka波段圆极化全向天线
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887912
K. An, Xiang Gao, Hong-Hong Zhang, Aixin-Chen, Manman Li
{"title":"A Circularly Polarized Omni-Directional Antenna for Ka Band","authors":"K. An, Xiang Gao, Hong-Hong Zhang, Aixin-Chen, Manman Li","doi":"10.1109/iWEM.2019.8887912","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887912","url":null,"abstract":"A circularly polarized antenna is developed with an omni-directional radiation pattern in the horizontal plane. Two flexible 8-element circularly polarized microstrip arrays are employed for a cylindrical conformal antenna design. The two arrays are printed on flexible thin dielectric substrates, and then rolled onto a cylinder surface. A feeding circuit combined with a connection line is designed to feed the two arrays. simulated results show that the VSWR belows 1.5 in the band. The gain variation in the omni-directional plane is less than 1.2 dB.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117170555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
End-to-End Bank Card Number Recognition Algorithm Based on DenseNet 基于DenseNet的端到端银行卡号码识别算法
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) Pub Date : 2019-09-01 DOI: 10.1109/iWEM.2019.8887900
Liu Yun, Ma Ruidi, Li Hui, Cui Xuehong
{"title":"End-to-End Bank Card Number Recognition Algorithm Based on DenseNet","authors":"Liu Yun, Ma Ruidi, Li Hui, Cui Xuehong","doi":"10.1109/iWEM.2019.8887900","DOIUrl":"https://doi.org/10.1109/iWEM.2019.8887900","url":null,"abstract":"Printed bank cards number, which are usually black and not easily confused with the background, is easy to split and recognize; embossed bank card, the color of bumped card number is similar to background, characters difficult to split and identify. This paper proposes an end-to-end bank card number recognition algorithm, first uses CTPN network for text detection, then sends the test results into the DenseNet network to identify, finally the card number is output according to the text length. Experimental results show that the algorithm can achieve the automatic identification of the two types of bank card, with high recognition rate and accuracy.","PeriodicalId":428997,"journal":{"name":"2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115400708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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