Pub Date : 2022-09-27DOI: 10.1109/LEMCPA.2022.3210040
Y. Berthoud;J.-M. Duchamp;A. Niembro-Martin;E. Dreina;F. Ndagijimana
This letter deals with the characterization of Ohmic losses induced by galvanized steel in diffuse field environments. It is then used to compute the mean response of electrically large resonant structures using a statistical method called “Power Balance” (PWB). The Ohmic losses are often predominant and, thus, need to be properly modeled for the method to be accurate. It is especially true for galvanized steel, as it induces losses several orders of magnitude greater than those of untreated steel. First, this letter reviews the principle of the method before presenting a new empirical method for evaluating Ohmic losses induced by coated metals such as galvanized steel. Finally, this method is used as a tool to create an accurate PWB model of a 6-cavity configuration, validated by measurements.
{"title":"An Empirical Characterization of Galvanized Steel Ohmic Losses—Application to the Modeling of Large Resonant Structures","authors":"Y. Berthoud;J.-M. Duchamp;A. Niembro-Martin;E. Dreina;F. Ndagijimana","doi":"10.1109/LEMCPA.2022.3210040","DOIUrl":"https://doi.org/10.1109/LEMCPA.2022.3210040","url":null,"abstract":"This letter deals with the characterization of Ohmic losses induced by galvanized steel in diffuse field environments. It is then used to compute the mean response of electrically large resonant structures using a statistical method called “Power Balance” (PWB). The Ohmic losses are often predominant and, thus, need to be properly modeled for the method to be accurate. It is especially true for galvanized steel, as it induces losses several orders of magnitude greater than those of untreated steel. First, this letter reviews the principle of the method before presenting a new empirical method for evaluating Ohmic losses induced by coated metals such as galvanized steel. Finally, this method is used as a tool to create an accurate PWB model of a 6-cavity configuration, validated by measurements.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"4 4","pages":"103-107"},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67853819","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}
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.
{"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}
Pub Date : 2022-09-02DOI: 10.1109/LEMCPA.2022.3196482
Summary form only: Abstracts of articles presented in this issue of the publication.
仅限摘要形式:本期出版物中的文章摘要。
{"title":"Synopsis of the September 2022 Issue of the IEEE Letters on Electromagnetic Compatibility Practice and Applications","authors":"","doi":"10.1109/LEMCPA.2022.3196482","DOIUrl":"https://doi.org/10.1109/LEMCPA.2022.3196482","url":null,"abstract":"Summary form only: Abstracts of articles presented in this issue of the publication.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"4 3","pages":"53-55"},"PeriodicalIF":0.0,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8566057/9875128/09875156.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67868264","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}
Pub Date : 2022-08-16DOI: 10.1109/LEMCPA.2022.3197056
Danilo Izzo;Robert Vogt-Ardatjew;Frank Leferink
This letter describes the design and operation of a novel type of hybrid chamber used for radiated susceptibility tests. This is a semi-anechoic chamber with the possibility to install a vibrating intrinsic reverberation chamber inside. This testing environment can be used for the execution of the radiated susceptibility tests using both the deterministic and stochastic methodologies but without changing the test location, nor moving the device under test with its auxiliary equipment. This allows test engineers to combine the advantages of both reverberation and semi-anechoic chambers with a minimum effort, making it a very practical, cost- and time-efficient solution. The electric field into the reverberation chamber is monitored by eight electric field probes, permitting the closed-loop control of the electric field strength level and an efficient real-time analysis of the performance indicators discussed in this letter.
{"title":"Efficient Use of a Hybrid Chamber for Radiated Susceptibility Tests","authors":"Danilo Izzo;Robert Vogt-Ardatjew;Frank Leferink","doi":"10.1109/LEMCPA.2022.3197056","DOIUrl":"https://doi.org/10.1109/LEMCPA.2022.3197056","url":null,"abstract":"This letter describes the design and operation of a novel type of hybrid chamber used for radiated susceptibility tests. This is a semi-anechoic chamber with the possibility to install a vibrating intrinsic reverberation chamber inside. This testing environment can be used for the execution of the radiated susceptibility tests using both the deterministic and stochastic methodologies but without changing the test location, nor moving the device under test with its auxiliary equipment. This allows test engineers to combine the advantages of both reverberation and semi-anechoic chambers with a minimum effort, making it a very practical, cost- and time-efficient solution. The electric field into the reverberation chamber is monitored by eight electric field probes, permitting the closed-loop control of the electric field strength level and an efficient real-time analysis of the performance indicators discussed in this letter.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"4 4","pages":"97-102"},"PeriodicalIF":0.0,"publicationDate":"2022-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67853855","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}