Progress in Electromagnetics Research-Pier最新文献_第7页

Efficiency of Millimeter Wave Mobile Terminal Antennas with the Influence of Users 毫米波移动终端天线效率与用户影响

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2018-01-01 DOI: 10.2528/PIER18012409

Rizwan Khan, A. A. Al-Hadi, P. Soh

{"title":"Efficiency of Millimeter Wave Mobile Terminal Antennas with the Influence of Users","authors":"Rizwan Khan, A. A. Al-Hadi, P. Soh","doi":"10.2528/PIER18012409","DOIUrl":"https://doi.org/10.2528/PIER18012409","url":null,"abstract":"The effect of users on the efficiency of mobile terminal antennas at 15GHz, 28GHz and 60GHz is studied in this paper. It is performed using three four-element planar arrays. The first operates at 15GHz with a bandwidth of 0.74 GHz, the second at 28GHz with a bandwidth of 2.5 GHz and finally the third antenna at 60GHz with bandwidth of 12.5 GHz. The effect of a user’s finger is studied when being placed on four different locations over each antenna element, with six distances between the antenna and user’s index finger. The losses due to the increased shadowing are studied in terms of radiation efficiency (RE), matching efficiency (ME) and two additional multiple-input-multiple-output (MIMO) parameters, i.e., envelop correlation coefficient (ECC) and multiplexing efficiency (MUX). For antennas operating at 28 and 60 GHz, the minimum frequency shift is observed when the finger is placed at 1.5 mm distance from the antenna, whereas for 15 GHz, the minimum resonance shift is observed when the finger is at 2 mm distance. Losses of up to 80% and 70% are observed for RE and MUX, respectively, when the finger is placed at 0 mm for all antennas compared to the case without user (WU). Finally, it is observed that the ME and ECC losses are insignificant regardless of the antenna and finger variation.","PeriodicalId":54551,"journal":{"name":"Progress in Electromagnetics Research-Pier","volume":"87 1","pages":"113-123"},"PeriodicalIF":6.7,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80550198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Design and Implementation of High Efficiency and Broadband Transmission-Type Polarization Converter Based on Diagonal Split-Ring Resonator 基于对角劈环谐振器的高效宽带传输型偏振变换器的设计与实现

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2018-01-01 DOI: 10.2528/PIER17110604

Rui Zhao, Haiyan Chen, Linbo Zhang, Fengxia Li, P. Zhou, Jianliang Xie, Longjiang Deng

引用次数: 3

E Fficient Metasurface Rectenna for Electromagnetic Wireless Power Transfer and Energy Harvesting 用于电磁无线能量传输和能量收集的高效超表面整流天线

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2018-01-01 DOI: 10.2528/PIER18011003

M. E. Badawe, O. Ramahi

引用次数: 11

Microwave Non-Invasive Temperature Monitoring Using UWB Radar for Cancer Treatment by Hyperthermia 超宽带雷达微波无创温度监测在肿瘤热疗治疗中的应用

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2018-01-01 DOI: 10.2528/PIER17111609

O. Fiser, M. Helbig, J. Sachs, S. Ley, I. Merunka, J. Vrba

引用次数: 18

SVR-CMT Algorithm for Null Broadening and Sidelobe Control 零展宽与旁瓣控制的SVR-CMT算法

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2018-01-01 DOI: 10.2528/PIER18061106

Fulai Liu, Yifan Wu, Hanjun Duan, Ruiyan Du

{"title":"SVR-CMT Algorithm for Null Broadening and Sidelobe Control","authors":"Fulai Liu, Yifan Wu, Hanjun Duan, Ruiyan Du","doi":"10.2528/PIER18061106","DOIUrl":"https://doi.org/10.2528/PIER18061106","url":null,"abstract":"Minimum variance distortionless response (MVDR) beamformer is an adaptive beamforming technique that provides a method for separating the desired signal from interfering signals. Unfortunately, the MVDR beamformer may have unacceptably low nulling level and high sidelobes, which may lead to significant performance degradation in the case of unexpected interfering signals such as the rapidly moving jammer environments. Via support vector machine regression (SVR), a novel beamforming algorithm (named as SVR-CMT algorithm) is presented for controlling the sidelobes and the nullling level. In the proposed method, firstly, the covariance matrix is tapered based on Mailloux covariance matrix taper (CMT) procedure to broaden the width of nulls for interference signals. Secondly, the equality constraints are modified into inequality constraints to control the sidelobe level. By the ε-insensitive loss function for the sidelobe controller, the modified beamforming optimization problem is formulated as a standard SVR problem so that the weight vector can be obtained effectively. Compared with the previous works, the proposed SVR-CMT method provides better beamforming performance. For instance, (1) it can effectively control the sidelobe and nullling level, (2) it can improve the output signal-to-interference-and-noise ratio (SINR) performance even if the direction-of-arrival (DOA) errors exist. Simulation results demonstrate the efficiency of the presented approach.","PeriodicalId":54551,"journal":{"name":"Progress in Electromagnetics Research-Pier","volume":"61 1","pages":"39-50"},"PeriodicalIF":6.7,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74108203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

An UWB Antenna Array for Flexible IoT Wireless Systems 用于灵活物联网无线系统的超宽带天线阵列

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2018-01-01 DOI: 10.2528/PIER18060804

H. Raad

引用次数: 14

Development of Multilayer Rectangular Coils for Multiple-Receiver Multiple-Frequency Wireless Power Transfer 多接收机多频无线电力传输用多层矩形线圈的研制

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2018-01-01 DOI: 10.2528/PIER18060206

C. Jiang, K. Chau, W. Han, Wei Liu

引用次数: 12

Patch Antenna Using Rectangular Centre Slot and Circular Ground Slot for Circularly Polarized Synthetic Aperture Radar (CP-SAR) Application 矩形中心槽和圆形地槽贴片天线在圆极化合成孔径雷达(CP-SAR)中的应用

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER17082903

F. Kurniawan, J. Sumantyo, K. Ito, H. Kuze, S. Gao

引用次数: 16

Optical Biosensing and Bioimaging with Porous Silicon and Silicon Quantum Dots ( Invited Review ) 多孔硅和硅量子点的光学生物传感和生物成像(特邀评论)

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER17120504

Xiaoyu Cheng, B. Guan

{"title":"Optical Biosensing and Bioimaging with Porous Silicon and Silicon Quantum Dots ( Invited Review )","authors":"Xiaoyu Cheng, B. Guan","doi":"10.2528/PIER17120504","DOIUrl":"https://doi.org/10.2528/PIER17120504","url":null,"abstract":"Silicon is the second most abundant element in Earth’s crust, and it is considered one of the most important materials for the world. Crystalline silicon has continued to serve as the foundational building block for the microelectronic industry, and new forms of silicon materials have promised an even brighter future with emerging applications from optoelectronic devices, energy and environment technologies and new therapeutics [1–3]. Many of these promises are often associated with reduction of the physical size of the material to the micro/nano scale which yields novel physical properties. For this reason, understanding and learning how to control these features is of high importance, and unsurprisingly, low dimension silicon structures have drawn broad research interests from physicists, chemists, materials engineers and medical scientists. At the new frontiers of nanostructure silicon research, biomedical applications are very appealing because silicon is highly biocompatible [4]. With the small sized silicon materials suitable for these applications, two distinct structures are porous silicon, and silicon nanocrystals which are also called quantum dots. Porous silicon is a form of crystalline silicon where the surface is embedded with nanometer sized pores [5], while silicon quantum dots are ultrasmall crystals of only a few nanometers in size [6]. They both exhibit unique optical features suitable for sensing and imaging, which can be tuned via comparable surface engineering methods. For this reason, this review combines the two subjects in one article, with the scope of advancing th fields through a comparative approach. Since both porous silicon and silicon quantum dots have been actively researched in the past two decades and multiple excellent reviews have been published [3, 5, 7], this paper will only highlight recent progresses in the past several years.","PeriodicalId":54551,"journal":{"name":"Progress in Electromagnetics Research-Pier","volume":"68 1","pages":"103-121"},"PeriodicalIF":6.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76993243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

CHARACTERIZATION AND OPTIMIZATION OF CYLINDRICAL POLARIMETRIC ARRAY ANTENNA PATTERNS FOR MULTI-MISSION APPLICATIONS 用于多任务应用的圆柱形极化阵列天线方向图的表征和优化

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER16122804

H. Saeidi-Manesh, Guifu Zhang

引用次数: 7