Aeu-International Journal of Electronics and Communications最新文献_第2页

High gain nested dielectric resonator rectenna based on higher order mode and magneto-electric dipole theory 基于高阶模式和磁电偶极理论的高增益嵌套式介质谐振器整流天线

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-16 DOI: 10.1016/j.aeue.2024.155590

Lei Li, Xue Li, Lihua Wang, Yuting Jia, Yang Hu, Jingchang Nan

{"title":"High gain nested dielectric resonator rectenna based on higher order mode and magneto-electric dipole theory","authors":"Lei Li, Xue Li, Lihua Wang, Yuting Jia, Yang Hu, Jingchang Nan","doi":"10.1016/j.aeue.2024.155590","DOIUrl":"10.1016/j.aeue.2024.155590","url":null,"abstract":"<div><div>In this paper, a high-gain nested dielectric resonator rectenna operating at 5.8 GHz based on the magneto-electric dipole theory is proposed. A nested structure is employed to achieve the required resonant frequency in a small dimension. And the higher order HE<sub>21δ</sub> mode of the dielectric resonator antenna (DRA) is excited by a vertical coaxial probe feeding, which is equated to a horizontal array of crossed magnetic dipoles, thus enhancing the gain. Then, two vertical metal posts are embedded inside the DRA, serving as electric dipoles to form a magneto-electric dipole array in conjunction with the magnetic dipoles, which suppress the excessive lobes of the DRA in HE<sub>21δ</sub> mode and hence enhance the maximum gain of the DRA to 9.8 dBi. A rectifier circuit with harmonic suppression is designed. By adding a short-circuit microstrip transmission line to the rectifier circuit, the second harmonic with infinite impedance is suppressed and reflected back to the diode for secondary rectification. The designed rectifier circuit is connected to the DRA to form a rectenna. The test result shows that the rectenna obtains a peak conversion efficiency of 43.9 % and an output voltage of 1.95 V at 5.8 GHz, which is suitable for wireless energy harvesting.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155590"},"PeriodicalIF":3.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 0

Compact and low phase-noise dual-frequency oscillator based on dual-band filter with multiple coupling technique 基于多重耦合技术双频滤波器的紧凑型低相位噪声双频振荡器

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-16 DOI: 10.1016/j.aeue.2024.155595

Yang Wang, Yingming Wang, Zhixia Xu, Shiqiang Fu

引用次数: 0

Simultaneous multi-person vital signs monitoring using multiple-input multiple-output FMCW millimeter wave radar 利用多输入多输出 FMCW 毫米波雷达同时监测多人生命体征

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-14 DOI: 10.1016/j.aeue.2024.155578

Shuaikang Xue , Zhihuo Xu , Yuexia Wang , Jiajia Shi , Abdulkadir C. Yucel

{"title":"Simultaneous multi-person vital signs monitoring using multiple-input multiple-output FMCW millimeter wave radar","authors":"Shuaikang Xue , Zhihuo Xu , Yuexia Wang , Jiajia Shi , Abdulkadir C. Yucel","doi":"10.1016/j.aeue.2024.155578","DOIUrl":"10.1016/j.aeue.2024.155578","url":null,"abstract":"<div><div>Non-contact radar-based vital signs measurement holds immense significance in the context of a rapidly ageing society, underscoring its pivotal role in modern healthcare. While substantial progress has been made in developing radar-based systems for single-person vital sign detection, there remains a conspicuous gap in the domain of simultaneous multi-person measurement. This challenge is compounded by the inherently weak heart signals captured by radar, further exacerbated when dealing with multiple individuals. This paper presents a cutting-edge non-contact measurement system with multiple-input multiple-output (MIMO) frequency modulated continuous wave (FMCW) millimeter wave (mmW) radar for simultaneous multi-person vital signs monitoring. Firstly, a fusion-based approach is presented for multi-person localization within sequential MIMO range-angle maps. Subsequently, an optimization-based method is outlined for the extraction of vital signs, adeptly retrieving respiratory and cardiac signals from the radar’s phase data for each individual. Through extensive experimental validations, the system demonstrates a remarkably low error rate of 1.03% for respiratory measurement and 2.70% for cardiac measurement, reaffirming its efficacy and reliability.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155578"},"PeriodicalIF":3.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 0

Hybrid-coupler-based quasi-reflectionless balanced bandpass filter with all common mode suppression 基于混合耦合器的全共模抑制准无反射平衡带通滤波器

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-12 DOI: 10.1016/j.aeue.2024.155593

Jinlong Wang, Xuehui Guan, Baoping Ren, Shaopeng Wan

引用次数: 0

FPGA implementation of an optimized neural network for CFD acceleration 用于 CFD 加速的优化神经网络的 FPGA 实现

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-09 DOI: 10.1016/j.aeue.2024.155574

Gökalp Çevik , Baykal Sarıoğlu , İbrahim Başar Aka

{"title":"FPGA implementation of an optimized neural network for CFD acceleration","authors":"Gökalp Çevik , Baykal Sarıoğlu , İbrahim Başar Aka","doi":"10.1016/j.aeue.2024.155574","DOIUrl":"10.1016/j.aeue.2024.155574","url":null,"abstract":"<div><div>In this work, an evaluation of FPGAs as the central computation platform in domain-specific AI-accelerated CFD simulations is performed. This evaluation is performed in three categories: power efficiency, speed, and accuracy. The specific domain in the study is the FDA nozzle benchmark, which is simulated using SimpleFoam, a laminar solver that is a component of the OpenFOAM CFD toolbox. The proposed AI model is a low-parameter feed-forward neural network with three fully connected layers, trained using steady-state solutions distinguished by various Reynolds numbers, all of which are computed by the OpenFOAM framework. The proposed model can then generate the steady-state CFD simulation result given the initial few iterations generated by the solver. Moreover, this paper introduces a hardware implementation for inference of the simulation results using an SoC chip with minimal hardware resource utilization. The suggested hardware design is developed from scratch for Zynq-7000 System-on-Chip, using only VHDL, and requiring no dependencies on third-party commercial AI frameworks or costly FPGA boards designed for AI-related applications. The proposed workflow in the test case study achieves a 98% reduction in simulation time while maintaining relatively high accuracy and a 95.6% reduction in energy consumption compared with the regular CFD workflow.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155574"},"PeriodicalIF":3.0,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 0

Isolation improvement in MIMO antenna with a simple hybrid technique of orthogonal and inverse currents 利用正交和反向电流的简单混合技术改善多输入多输出天线的隔离性能

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-09 DOI: 10.1016/j.aeue.2024.155576

Manzoor Elahi , Slawomir Koziel , Leifur Leifsson

{"title":"Isolation improvement in MIMO antenna with a simple hybrid technique of orthogonal and inverse currents","authors":"Manzoor Elahi , Slawomir Koziel , Leifur Leifsson","doi":"10.1016/j.aeue.2024.155576","DOIUrl":"10.1016/j.aeue.2024.155576","url":null,"abstract":"<div><div>This paper presents a compact high-isolation multiple-input multiple-output (MIMO) antenna developed using a hybrid approach. The proposed technique combines induced orthogonal currents and self-inverse currents to enhance the antenna’s performance. Orthogonal currents are generated by strategically etching open slots on the antenna patches, while self-inverse currents are introduced by integration of annular vias. By carefully adjusting the radius and position of the annular vias and optimizing the patch geometry, the design achieves optimal resonance frequency alignment and significantly improved isolation. The fabricated prototype exhibits an exceptional isolation of 55 dB at 5.75 GHz, accompanied by a realized gain of 6.7 dB. Measured radiation patterns in the <span><math><mrow><mi>ϕ</mi><mo>=</mo><msup><mrow><mn>0</mn></mrow><mrow><mo>∘</mo></mrow></msup></mrow></math></span> and <span><math><mrow><mi>ϕ</mi><mo>=</mo><mn>9</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>∘</mo></mrow></msup></mrow></math></span> planes show excellent agreement with simulated results. The proposed low-profile antenna design has a substantial potential for enhancing MIMO applications in contemporary wireless communication systems.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155576"},"PeriodicalIF":3.0,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 0

Twin cascaded-trisection coupling topology and its application to dielectric waveguide resonator diplexer 双级联-三段耦合拓扑及其在介质波导谐振器双工器中的应用

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-08 DOI: 10.1016/j.aeue.2024.155573

Xin Xu, Wei Qin, Jian-Xin Chen

{"title":"Twin cascaded-trisection coupling topology and its application to dielectric waveguide resonator diplexer","authors":"Xin Xu, Wei Qin, Jian-Xin Chen","doi":"10.1016/j.aeue.2024.155573","DOIUrl":"10.1016/j.aeue.2024.155573","url":null,"abstract":"<div><div>This article investigates the twin cascaded-trisection (TCT) coupling topology, based on which a dielectric waveguide resonator (DWR) diplexer is designed. The TCT topology is constructed by two traditional trisection structures with one coupling route being shared. By properly setting the polarities of the couplings, it can generate two transmission zeros (TZs) on one side of the passband, either the low side or the high side. In order to facilitate the TCT topology, a four-pole DWR unit is constructed by flexibly utilizing four hexagonal DWRs. A diplexer with two frequency bands of 3.4 GHz−3.5 GHz (Channel 1) and 3.6 GHz−3.7 GHz (Channel 2) is designed by using two four-pole DWR units. A printed circuit board (PCB) is employed to realize the feeding and matching network for the two units. Two TZs are generated on the high side of the Channel 1 and two TZs are generated on the low side of Channel 2, making the filtering selectivity improved. The designed diplexer is fabricated and measured. For the two measured channels, the minimum insertion losses are 0.85 dB and 0.94 dB, and the isolations are better than 44 dB and 31 dB.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155573"},"PeriodicalIF":3.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 0

Simple power-efficient preamplifier-shaper channel for readout interface of silicon detectors 用于硅探测器读出接口的简单省电前置放大器-整形器通道

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-07 DOI: 10.1016/j.aeue.2024.155577

Sánchez-Rodríguez Trinidad , Gómez-Galán Juan Antonio , Hinojo-Montero José , Sánchez-Raya Manuel , Muñoz Fernando , González-Carvajal Ramón

{"title":"Simple power-efficient preamplifier-shaper channel for readout interface of silicon detectors","authors":"Sánchez-Rodríguez Trinidad , Gómez-Galán Juan Antonio , Hinojo-Montero José , Sánchez-Raya Manuel , Muñoz Fernando , González-Carvajal Ramón","doi":"10.1016/j.aeue.2024.155577","DOIUrl":"10.1016/j.aeue.2024.155577","url":null,"abstract":"<div><div>This paper presents the design and characteristics of a front-end readout system for silicon sensors used in nuclear spectroscopy studies. Furthermore, the study proposes circuit topologies that combine gain-boosting and class-AB techniques featuring a good performance regarding gain, accuracy, speed, linearity, and power consumption, meeting the stringent requirements of deep submicrometer CMOS technologies. The readout channel comprises a charge-sensitive amplifier with a tunable discharge time, pole-zero cancellation circuit, and first-order unipolar shaper with a peaking time of 90 ns. The building blocks are made up of single-stage op-amps, thus not requiring compensation. Furthermore, the circuit is optimized for a detector capacitance of 5 pF, and the noise performance is discussed. Experimental results in a 180 nm CMOS process and a supply voltage of ±0.9 V validate the designed front-end channel. The total area of the chip obtained was 0.028 mm<sup>2</sup>. The conversion gain was 3.1 mV/fC, and the system maintained linearity up to an input charge range of 150 fC with a maximum output swing of 460 mV and recovered to the baseline within 400 ns. The compact design and the power consumption of only 1.97 mW provided a feasible solution for current radiation detectors coupled to many highly dense electronic channels.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155577"},"PeriodicalIF":3.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and simultaneous analytical optimization of microwave filters with superimposed rectangular cavities for radar applications 设计和同步分析优化雷达应用中的叠加矩形腔微波滤波器

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-07 DOI: 10.1016/j.aeue.2024.155572

Anicet Nzepang Djianga , Clement Mbinack , Guy Ayissi Eyebe , Ping Zhao , Jean Sire Armand Eyebe Fouda

{"title":"Design and simultaneous analytical optimization of microwave filters with superimposed rectangular cavities for radar applications","authors":"Anicet Nzepang Djianga , Clement Mbinack , Guy Ayissi Eyebe , Ping Zhao , Jean Sire Armand Eyebe Fouda","doi":"10.1016/j.aeue.2024.155572","DOIUrl":"10.1016/j.aeue.2024.155572","url":null,"abstract":"<div><div>In this paper, a method for the rapid design of filters with superimposed rectangular cavities is proposed. It starts with a good initialization of the filter dimensions from the targeted coupling matrix, which serves as the basis for calculating the bandwidth of the inter-cavity couplings (CBW) and the group delay (GD) of the input/output couplings. Next, an analytical and simultaneous optimization of all filter dimensions is applied. It is based on the extraction of the S-parameter coupling matrix from Model-based Vector Fitting (MVF) coupled to the Generalized Isospectral Flow Method (GIFM). The differences between the coefficients of the targeted matrix and the extracted matrix are then calculated, and depending on their positive or negative signs, appropriate adjustments are applied to the filter dimensions. This computer-aided design (CAD) process was successfully used to design one single-band and one dual-band 6th-order microwave filters with superimposed-cavity , with respective center frequencies of 10 GHz and 9.99 GHz, and taking into account milling constraints for eventual manufacture.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155572"},"PeriodicalIF":3.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 0

Magnetic actuator driver system for laser scanning capsule endoscopy 用于激光扫描胶囊内窥镜的磁性致动器驱动系统

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-07 DOI: 10.1016/j.aeue.2024.155571

Berkay Kebapcıoğlu , Kuter Erdil , Ahmet Can Erten , Onur Ferhanoğlu , Mustafa Berke Yelten

{"title":"Magnetic actuator driver system for laser scanning capsule endoscopy","authors":"Berkay Kebapcıoğlu , Kuter Erdil , Ahmet Can Erten , Onur Ferhanoğlu , Mustafa Berke Yelten","doi":"10.1016/j.aeue.2024.155571","DOIUrl":"10.1016/j.aeue.2024.155571","url":null,"abstract":"<div><div>This paper focuses on designing and implementing a power and area-efficient magnetic actuator driver interface integrated circuit for laser scanning capsule endoscopy. The proposed system contains a 3D-printed focus-adjusting actuator embarking a lens, multiple magnets, an external coil, battery, laser, and actuator driver integrated circuit with off-chip components. The actuator features multiple pantograph springs connected to the lens, as well as multiple magnets, enabling precise focusing capability through electromagnetic actuation. A magnetic actuator driver integrated circuit implemented in a commercial 180 nm CMOS process drives the coil at 32 Hz, which is the mechanical resonance frequency of the actuator. A novel control methodology for the driver has been devised, aimed at enhancing driving efficiency and mitigating total harmonic distortion. Simulations and measurements substantiate that the actuator can induce a 3.22 mm focal point displacement while the driver circuit delivers 9.62 mA (RMS) current to the 7.7 mH coil. Under these conditions, the system exhibits an aggregate power consumption of 11.48 mW, thereby achieving a power efficiency of 85.5%.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"188 ","pages":"Article 155571"},"PeriodicalIF":3.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 0