IEEE Letters on Electromagnetic Compatibility Practice and Applications最新文献_第9页

An Approach to Identify Noise-Source Parameters of DC–DC Converter and Predict Conducted Emissions With Different Loads 一种识别DC-DC变换器噪声源参数和预测不同负载下传导发射的方法

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-12-09 DOI: 10.1109/LEMCPA.2022.3228199

Shuqi Zhang;Kengo Iokibe;Yoshitaka Toyota

{"title":"An Approach to Identify Noise-Source Parameters of DC–DC Converter and Predict Conducted Emissions With Different Loads","authors":"Shuqi Zhang;Kengo Iokibe;Yoshitaka Toyota","doi":"10.1109/LEMCPA.2022.3228199","DOIUrl":"https://doi.org/10.1109/LEMCPA.2022.3228199","url":null,"abstract":"The black-box equivalent-circuit model is generally used to predict electromagnetic interference (EMI) from dc–dc converters for assisting with filter design. We previously proposed a Norton-based two-port equivalent-circuit model excluding load to investigate the load effect on EMI. The EMI prediction presupposes constant internal impedances independent of the load change with only the noise current source change dependent on the load change. Under these conditions, the noise current source at any load can be calculated by using the numerical interpolation method. In this work, we used a dc–dc buck converter with a switching frequency of 200 kHz and identified the model parameters precisely by applying the waveform decomposition method. The internal admittances were found to be almost constant with respect to load change and only the input-port current source decreased with load. We then applied the cubic spline interpolation method to fit the input-port current source and calculate it at any load. This approach was verified by predicting the input-port noise voltage for loads between 3.3 and \u0000<inline-formula> <tex-math>$15.6~Omega $ </tex-math></inline-formula>\u0000. Below 80 MHz, where the input-port current source decreased with load, the input-port voltage predicted using the input-port current source fitted by interpolation was in good agreement with the measured one.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 1","pages":"5-9"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8566057/10079119/09978542.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67856111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Improving the Performance of Direct-Conversion SDRs for Radiated Precompliance Measurements 用于辐射预一致性测量的直接转换SDR的性能改进

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-12-07 DOI: 10.1109/LEMCPA.2022.3227409

C. Spindelberger;H. Arthaber

{"title":"Improving the Performance of Direct-Conversion SDRs for Radiated Precompliance Measurements","authors":"C. Spindelberger;H. Arthaber","doi":"10.1109/LEMCPA.2022.3227409","DOIUrl":"https://doi.org/10.1109/LEMCPA.2022.3227409","url":null,"abstract":"In this letter, a highly linear front end to improve the performance of software-defined radio (SDRs) for radiated precompliance measurements is presented. In CISPR band C/D, the test receiver needs to fulfill stringent requirements for using the quasi-peak detector. Usually, an expensive preselection filter bank is necessary to make fully compliant measurements of broadband transients. Direct-conversion-based SDRs show a limited out-of-the-box performance for precompliance measurements caused by, e.g., harmonic mixing and saturation effects. With the use of a triple-balanced mixer, a highly linear upconversion stage is built, eliminating the need for a filter bank. The dynamic range (DR) requirements for the SDR are strongly reduced by a narrowband intermediate frequency filter, making CISPR 16-1-1 compliant measurements possible. The sensitivity of the front end is comparable to professional receivers on the market, although no low-noise amplifier is implemented. The performance is verified by continuous wave (CW) and transient signals according to CISPR norms. The broadband measurement results are compared with traditional characterizations of the DR using the compression level and the noise figure. It shows that assumptions on the RF-link budget for a compliant design can be made with CW measurements. Based on our results, the requirements for the SDR front end are derived.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"5 1","pages":"22-26"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8566057/10079119/09973334.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67856110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Credibility Evaluation of Electromagnetic Simulation Results Based on Convolutional Neural Network 基于卷积神经网络的电磁仿真结果可信度评估

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-12-01 DOI: 10.1109/LEMCPA.2022.3226151

Jinjun Bai;Yulei Liu;Dewu Kong;Kaibin Guo

引用次数: 0

Comparison of ESD Damage Test for Common-Mode Chokes With ESD Gun and TLP-HMM 用ESD枪和TLP-HMM对共模扼流圈进行ESD损伤测试的比较

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-11-16 DOI: 10.1109/LEMCPA.2022.3222019

Hironori Ito;Masahiro Yoshida;Yusuke Yano;Jianqing Wang;Takeshi Ishida;Masanori Sawada

引用次数: 0

Synchronous Multipoint Low-Frequency EMI Measurement and Applications 同步多点低频EMI测量及其应用

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-11-01 DOI: 10.1109/LEMCPA.2022.3218320

Alexander Matthee;Niek Moonen;Frank Leferink

引用次数: 1

A Low-Cost RF Detector to Enhance the Direct Power Injection Conducted Immunity Setup 一种用于增强直接功率注入传导抗扰度设置的低成本射频检测器

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-09-30 DOI: 10.1109/LEMCPA.2022.3210876

Alexandre Boyer

引用次数: 1

Highly Angular-Stable Optically Transparent Microwave Absorber With Wide Absorption Bandwidth 具有宽吸收带宽的高角度稳定光学透明微波吸收体

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-09-28 DOI: 10.1109/LEMCPA.2022.3210020

Awanish Kumar;G. Shrikanth Reddy;Jyotibhusan P.

{"title":"Highly Angular-Stable Optically Transparent Microwave Absorber With Wide Absorption Bandwidth","authors":"Awanish Kumar;G. Shrikanth Reddy;Jyotibhusan P.","doi":"10.1109/LEMCPA.2022.3210020","DOIUrl":"https://doi.org/10.1109/LEMCPA.2022.3210020","url":null,"abstract":"This work presents an optically transparent frequency-selective surface (FSS)-based electromagnetic (EM) wave absorber that is polarization insensitive and offers a wide-band absorption bandwidth of 9 GHz within the C, X, and Ku bands. A slotted unit cell of an annular ring integrated with a cross exhibits fourfold symmetry, which makes it polarization insensitive. The proposed absorber is compact as the surface area of the unit cell is \u0000<inline-formula> <tex-math>$0.25 {mathrm {lambda }} _{c},, {times },,0.25 {mathrm {lambda }} _{c}$ </tex-math></inline-formula>\u0000 with a thickness of \u0000<inline-formula> <tex-math>$0.015 {mathrm {lambda }} _{c}~( {mathrm {lambda }} _{c}$ </tex-math></inline-formula>\u0000 is the wavelength at 10.95 GHz). In this work, the absorbance mechanism is presented using an electric and magnetic coupling, along with an effective input impedance plot of the unit cell. The theoretical analysis indicates that the proposed EM-wave absorber provides an absorption bandwidth of 9 GHz for normal incidence with 90% absorption. Theoretical results presented here further suggests that the proposed EM-wave absorber is polarization insensitive and angular stable up to 50° and 70° for TE and TM polarization, respectively. A prototype of the proposed EM-wave absorber is experimentally tested for its absorbance at different polarization angles. It is observed that the experimental results match well with the theoretical analysis.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"4 4","pages":"114-119"},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67853821","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: 3

An Empirical Characterization of Galvanized Steel Ohmic Losses—Application to the Modeling of Large Resonant Structures 镀锌钢欧姆损耗的经验表征——在大型谐振结构建模中的应用

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-09-27 DOI: 10.1109/LEMCPA.2022.3210040

Y. Berthoud;J.-M. Duchamp;A. Niembro-Martin;E. Dreina;F. Ndagijimana

引用次数: 0

Analysis of Electromagnetic Noise From Switching Power Modules Using Wide Band Gap Semiconductors 宽带隙半导体开关电源模块的电磁噪声分析

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-09-16 DOI: 10.1109/LEMCPA.2022.3207234

Koh Watanabe;Misaki Komatsu;Mai Aoi;Ryota Sakai;Satoshi Tanaka;Makoto Nagata

{"title":"Analysis of Electromagnetic Noise From Switching Power Modules Using Wide Band Gap Semiconductors","authors":"Koh Watanabe;Misaki Komatsu;Mai Aoi;Ryota Sakai;Satoshi Tanaka;Makoto Nagata","doi":"10.1109/LEMCPA.2022.3207234","DOIUrl":"https://doi.org/10.1109/LEMCPA.2022.3207234","url":null,"abstract":"Wide band gap (WBG) semiconductors, such as gallium nitride (GaN), have become popular among switching power modules. In pursuing power conversion efficiency, power module’s high-speed and high-power operation leads to electromagnetic (EM) noise in a very wide frequency range, potentially interfering with nearby wireless communications [e.g., long-term evolution (LTE)]. This letter analyzes the source of EM noise from the power modules using GaN transistors in half-bridge circuits. EM noise was clearly observed in the proximity of power modules and attributed to two primary sources in the frequency range of interest up to 6 GHz: 1) the periodical switching operation of GaN transistors in the output stage and 2) the logic operation of complementary metal–oxide–semiconductor digital circuits to control gate drivers, in the lower and upper side of frequencies, respectively. Measurements analyzed the EM noise characteristics at different probing locations over the assembly of two GaN power modules as well as in different operating conditions by strategically supplying source signals. The influence of EM noise on LTE receiver performance is evaluated with wireless system-level simulation and related to the degradation of its minimum receivable input power.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"4 4","pages":"92-96"},"PeriodicalIF":0.0,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8566057/9980833/09893896.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67853853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Synopsis of the September 2022 Issue of the IEEE Letters on Electromagnetic Compatibility Practice and Applications 《IEEE电磁兼容性实践与应用快报》2022年9月号综述

IEEE Letters on Electromagnetic Compatibility Practice and Applications Pub Date : 2022-09-02 DOI: 10.1109/LEMCPA.2022.3196482

引用次数: 0