Progress in Electromagnetics Research-Pier最新文献_第9页

Realization of All-Optical Digital Amplification in Coupled Nonlinear Photonic Crystal Waveguides 耦合非线性光子晶体波导中全光数字放大的实现

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER17010704

V. Jandieri, R. Khomeriki, D. Erni, W. Chew

{"title":"Realization of All-Optical Digital Amplification in Coupled Nonlinear Photonic Crystal Waveguides","authors":"V. Jandieri, R. Khomeriki, D. Erni, W. Chew","doi":"10.2528/PIER17010704","DOIUrl":"https://doi.org/10.2528/PIER17010704","url":null,"abstract":"In this conceptual study, all-optical amplification of the light pulses in two weakly coupled nonlinear photonic crystal waveguides (PCWs) is proposed. We consider two adjacent PCWs, which consist of line defects in a 2D square lattice of periodically distributed circular rods made from dielectric material with Kerr-type nonlinearity. Dispersion diagrams of the PCW’s symmetric and antisymmetric modes are analyzed using a recently developed analytical formulation. The operating frequency is properly chosen to be located at the edge of the PCW’s dispersion diagram (i.e., adjacent to the photonic crystals low-energy band edge), where in the linear case no propagation modes are excited. However, in case of a nonlinear medium when the amplitude of the injected signal is above some threshold value, solitons are formed propagating inside the coupled nonlinear PCWs. The near field distributions of the propagating light pulse inside the coupled nonlinear PCWs and the output power of the received signal are numerically studied in a detail. A very good agreement between the analytic soliton solution based on the nonlinear Schrödinger equation and numerical result is obtained. Amplification coefficients are calculated for the various amplitudes of the input signals. The results vividly demonstrate the effectiveness of the weakly coupled nonlinear PCWs as an all-optical digital amplifier.","PeriodicalId":54551,"journal":{"name":"Progress in Electromagnetics Research-Pier","volume":"64 1","pages":"63-72"},"PeriodicalIF":6.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75297736","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

Time Decomposition Method for the General Transient Simulation of Low-Frequency Electromagnetics 低频电磁一般瞬态仿真的时间分解方法

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER17072501

B. He, Chuan Lu, N. Chen, D. Lin, M. Rosu, P. Zhou

引用次数: 6

Magneto-Inductive Magnetic Resonance Imaging Duodenoscope 磁感磁共振成像十二指肠镜

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER17062104

R. Syms, E. Kardoulaki, M. Rea, K. Choonee, S. Taylor-Robinson, C. Wadsworth, I. Young

引用次数: 8

GENERAL NEAR FIELD SYNTHESIS OF REFLECTARRAY ANTENNAS FOR THEIR USE AS PROBES IN CATR catr中用作探头的反射天线的一般近场合成

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER17072705

D. R. Prado, Á. F. Vaquero, M. Arrebola, M. Pino, F. Las-Heras

引用次数: 7

SHAPE RECONSTRUCTION VIA EQUIVALENCE PRINCIPLES,CONSTRAINED INVERSE SOURCE PROBLEMS AND SPARSITY PROMOTION 基于等价原理、约束逆源问题和稀疏度提升的形状重构

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER16111404

M. Bevacqua, T. Isernia

引用次数: 32

Analysis on the Calculation of the Inverse Discrete Fourier Transform (IDFT) of Passband Frequency Response Measurements in Terms of Lowpass Equivalent Response 从低通等效响应的角度分析通带频响测量的离散傅立叶反变换(IDFT)的计算

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER17081703

A. Gifuni, S. Perna

引用次数: 6

Multi-band antenna array based on double negative metamaterial for multi automotive applications 基于双负极超材料的多波段天线阵列

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER16091203

A. Alqadami, M. Jamlos, I. Islam, P. Soh, R. Mamat, K. A. Khairi, A. Narbudowicz

{"title":"Multi-band antenna array based on double negative metamaterial for multi automotive applications","authors":"A. Alqadami, M. Jamlos, I. Islam, P. Soh, R. Mamat, K. A. Khairi, A. Narbudowicz","doi":"10.2528/PIER16091203","DOIUrl":"https://doi.org/10.2528/PIER16091203","url":null,"abstract":"This paper presents a design of multi-band array antenna based on Double Negative Metamaterial (DNM) unit cells for multi-automotive applications. The antenna consists of 4 × 4 rectangular and circular radiating patches connected in series using microstrip lines and fed by a 50Ω corporate microstrip line. An array of 4×6 wire loaded complementary spiral resonator (CSR) unit cells is placed on its reverse side to provide miniaturization and multiband features to the proposed design. The reflection coefficient (S11), mutual coupling, effective diversity gain (EDG), envelope correlation coefficient (ECC), and radiation patterns are evaluated for four elements of the proposed antenna placed in four different locations on the car body model. Simulations and measurements indicated that the proposed antenna features a low mutual coupling ( 9.995), high efficiency (72%-95%), and low on-car detuning over the desired five bands; 1.99GHz to 3.03 GHz, 5.15 GHz to 6.369 GHz, 7.67 GHz to 7.99GHz, 9.91GHz to 10.23 GHz, and 11.79 GHz to 12.2GHz. The performance of ECC between four antennas on car body has been investigated in different cases of isotropic, indoor, and outdoor. The metallic effect on antennas performance also has been investigated by evaluating the mutual coupling and transmission coefficient between two antennas served as transmitter and receiver with presence of car body. The results show transmission coefficient of proposed DNM antenna with metallic presence almost identical to free space across desired frequency bands. With all capabilities mentioned the antenna has potential for WiFi/WiMAX, Vehicleto-Vehicle (V2V), transportable earth exploration satellite, military requirement for land vehicles, and earth stations on vessels applications.","PeriodicalId":54551,"journal":{"name":"Progress in Electromagnetics Research-Pier","volume":"6 1","pages":"27-37"},"PeriodicalIF":6.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84878299","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: 9

Image Reconstruction from Highly Sparse and Limited Angular Diffraction Tomography Using Compressed Sensing Approach 基于压缩感知方法的高稀疏有限角衍射层析成像重建

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER16111501

P. Paladhi, A. Tayebi, P. Banerjee, L. Udpa, S. Udpa

{"title":"Image Reconstruction from Highly Sparse and Limited Angular Diffraction Tomography Using Compressed Sensing Approach","authors":"P. Paladhi, A. Tayebi, P. Banerjee, L. Udpa, S. Udpa","doi":"10.2528/PIER16111501","DOIUrl":"https://doi.org/10.2528/PIER16111501","url":null,"abstract":"Diffraction tomography (DT) from limited projection data has been an active research topic for over three decades. The interest has been steadily fueled due to its application in multiple disciplines including medical imaging, structural health monitoring and non-destructive evaluation to name a few. This paper explores the applicability of compressed sensing to recover complex-valued objective functions (e.g., complex permittivity in microwave tomography). Generally, compressed sensing based tomographic reconstruction has been studied under full angular access. In this paper, the effect of lowering the angular access in addition to highly limited number of projection data is explored. The effectiveness of the reconstruction methods is tested with severely limited dataset which would render reconstruction impossible by traditional iterative approximation methods. Furthermore, results show that complex-valued phantoms can be reconstructed from as few as 15 projections from 120◦ coverage, a significant finding. In this study, the Total Variation (TV) has been used as the l1 norm within the compressed sensing framework. The robustness of the algorithm in presence of noise is discussed. Use of multiple sparse domains has also been explored briefly. The results show the effectiveness of TV as a regularization parameter even for complex-valued images under the compressed sensing regime. This is a pertinent observation as TV is a simple norm to implement. For a large class of images, especially in medical imaging, this implies the availability of a steady l1 norm for easy implementation of compressed sensing reconstruction for complex-valued images.","PeriodicalId":54551,"journal":{"name":"Progress in Electromagnetics Research-Pier","volume":"19 1","pages":"21-36"},"PeriodicalIF":6.7,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76930780","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: 3

Illumination Optics in Emerging Naked-Eye 3D Display (Invited Review) 新兴裸眼3D显示中的照明光学(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/PIER17060101

Aiqin Zhang, Jia-Hong Wang, Yangui Zhou, Haowen Liang, H. Fan, Kunyang Li, Peter Krebs, Jianying Zhou

引用次数: 12

NON-COIL, OPTIMAL SOURCES FOR WIRELESS POWERING OF SUB-MILLIMETER IMPLANTABLE DEVICES 无线圈，亚毫米植入式设备无线供电的最佳电源

IF 6.7 1区计算机科学

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI: 10.2528/PIER16092301

Sanghoek Kim, J. S. Ho, A. Poon

引用次数: 3