{"title":"改进开放式 TEM 单元匹配的简单半分析隔板设计","authors":"Giacomo Giannetti;Christian Spindelberger;Holger Arthaber","doi":"10.1109/LEMCPA.2023.3333003","DOIUrl":null,"url":null,"abstract":"Open transverse electromagnetic (TEM) cells are used for many applications. Usually, such cells are built of metal sheets with linear profiles. Due to these simple geometries, impedance matching is limited. To improve the matching, a simple semianalytical method for an advanced septum profile is developed. Dominant TEM-mode propagation and an expression for the characteristic impedance of a stripline are considered. The characteristic impedances of the feed and the central stripline are equal to a given, desired value. To minimize reflections, the characteristic impedance of the TEM mode is enforced to be constant over the entire structure, especially along the tapered sections. In this way, the proposed method returns the septum width as a function of the longitudinal coordinate along the cell, such that each cross section has a characteristic impedance equal to the given, desired value. A septum designed according to the proposed method is manufactured and installed in a TEM cell prototype. The 30 MHz–1 GHz frequency range is considered to cover CISPR bands C and D. Both measurements and full-wave simulations indicate an improvement in the return loss of 4.6 dB from 10.6 to 15.2 dB with respect to the previously installed linearly tapered septum. Code supporting the findings available at: \n<uri>https://codeocean.com/capsule/4880490/tree</uri>\n.","PeriodicalId":100625,"journal":{"name":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","volume":"6 1","pages":"6-10"},"PeriodicalIF":0.9000,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10318185","citationCount":"0","resultStr":"{\"title\":\"Simple Semianalytical Septum Design for Improved Matching in Open TEM Cells\",\"authors\":\"Giacomo Giannetti;Christian Spindelberger;Holger Arthaber\",\"doi\":\"10.1109/LEMCPA.2023.3333003\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Open transverse electromagnetic (TEM) cells are used for many applications. Usually, such cells are built of metal sheets with linear profiles. Due to these simple geometries, impedance matching is limited. To improve the matching, a simple semianalytical method for an advanced septum profile is developed. Dominant TEM-mode propagation and an expression for the characteristic impedance of a stripline are considered. The characteristic impedances of the feed and the central stripline are equal to a given, desired value. To minimize reflections, the characteristic impedance of the TEM mode is enforced to be constant over the entire structure, especially along the tapered sections. In this way, the proposed method returns the septum width as a function of the longitudinal coordinate along the cell, such that each cross section has a characteristic impedance equal to the given, desired value. A septum designed according to the proposed method is manufactured and installed in a TEM cell prototype. The 30 MHz–1 GHz frequency range is considered to cover CISPR bands C and D. Both measurements and full-wave simulations indicate an improvement in the return loss of 4.6 dB from 10.6 to 15.2 dB with respect to the previously installed linearly tapered septum. Code supporting the findings available at: \\n<uri>https://codeocean.com/capsule/4880490/tree</uri>\\n.\",\"PeriodicalId\":100625,\"journal\":{\"name\":\"IEEE Letters on Electromagnetic Compatibility Practice and Applications\",\"volume\":\"6 1\",\"pages\":\"6-10\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2023-11-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10318185\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Letters on Electromagnetic Compatibility Practice and Applications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10318185/\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Letters on Electromagnetic Compatibility Practice and Applications","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10318185/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
摘要
开放式横向电磁 (TEM) 单元应用广泛。通常情况下,这种电池由具有线性轮廓的金属板制成。由于这些简单的几何形状,阻抗匹配受到限制。为了改善匹配,我们开发了一种先进的隔膜轮廓的简单半解析方法。考虑了主要的 TEM 模式传播和带状线的特性阻抗表达式。馈电和中央带状线的特性阻抗等于给定的理想值。为了最大限度地减少反射,TEM 模式的特性阻抗在整个结构中,尤其是沿锥形部分,必须保持恒定。通过这种方式,所提出的方法可将隔板宽度作为沿单元纵向坐标的函数返回,从而使每个横截面的特性阻抗等于给定的期望值。根据所提方法设计的隔板已制造完成,并安装在 TEM 小室原型中。测量和全波模拟结果表明,与以前安装的线性锥形隔膜相比,回波损耗从 10.6 dB 提高到 15.2 dB,提高了 4.6 dB。支持研究结果的代码见:https://codeocean.com/capsule/4880490/tree。
Simple Semianalytical Septum Design for Improved Matching in Open TEM Cells
Open transverse electromagnetic (TEM) cells are used for many applications. Usually, such cells are built of metal sheets with linear profiles. Due to these simple geometries, impedance matching is limited. To improve the matching, a simple semianalytical method for an advanced septum profile is developed. Dominant TEM-mode propagation and an expression for the characteristic impedance of a stripline are considered. The characteristic impedances of the feed and the central stripline are equal to a given, desired value. To minimize reflections, the characteristic impedance of the TEM mode is enforced to be constant over the entire structure, especially along the tapered sections. In this way, the proposed method returns the septum width as a function of the longitudinal coordinate along the cell, such that each cross section has a characteristic impedance equal to the given, desired value. A septum designed according to the proposed method is manufactured and installed in a TEM cell prototype. The 30 MHz–1 GHz frequency range is considered to cover CISPR bands C and D. Both measurements and full-wave simulations indicate an improvement in the return loss of 4.6 dB from 10.6 to 15.2 dB with respect to the previously installed linearly tapered septum. Code supporting the findings available at:
https://codeocean.com/capsule/4880490/tree
.