{"title":"混响室中天线复合q因子的各种估计","authors":"P. Besnier, C. Lemoine, J. Sol","doi":"10.1109/ISEMC.2015.7256344","DOIUrl":null,"url":null,"abstract":"This paper deals with the estimation of the composite Q-factor in a reverberation chamber using one or two antennas (possibly a set of them). Most of Q-factor estimations provided in literature are based on the estimation of the ensemble average of the electric power captured at the terminal of a receiving antenna, the EM field being produced with another one. We first highlight that using two antennas and a vector network analyzer, three different estimations are possible and they are found experimentally to be almost equivalent. Second, removing one antenna the Q-factor may change mainly in the frequency range for which the Q-coefficient of an antenna is no more negligible. Furthermore a post-processing of these two types of measurements allows to extract an estimation of this Q-coefficient alone. This estimation is quite favorably compared to its theoretical estimation based on ideal random field hypothesis.","PeriodicalId":412708,"journal":{"name":"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"36","resultStr":"{\"title\":\"Various estimations of composite Q-factor with antennas in a reverberation chamber\",\"authors\":\"P. Besnier, C. Lemoine, J. Sol\",\"doi\":\"10.1109/ISEMC.2015.7256344\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper deals with the estimation of the composite Q-factor in a reverberation chamber using one or two antennas (possibly a set of them). Most of Q-factor estimations provided in literature are based on the estimation of the ensemble average of the electric power captured at the terminal of a receiving antenna, the EM field being produced with another one. We first highlight that using two antennas and a vector network analyzer, three different estimations are possible and they are found experimentally to be almost equivalent. Second, removing one antenna the Q-factor may change mainly in the frequency range for which the Q-coefficient of an antenna is no more negligible. Furthermore a post-processing of these two types of measurements allows to extract an estimation of this Q-coefficient alone. This estimation is quite favorably compared to its theoretical estimation based on ideal random field hypothesis.\",\"PeriodicalId\":412708,\"journal\":{\"name\":\"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)\",\"volume\":\"17 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2015-09-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"36\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISEMC.2015.7256344\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISEMC.2015.7256344","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Various estimations of composite Q-factor with antennas in a reverberation chamber
This paper deals with the estimation of the composite Q-factor in a reverberation chamber using one or two antennas (possibly a set of them). Most of Q-factor estimations provided in literature are based on the estimation of the ensemble average of the electric power captured at the terminal of a receiving antenna, the EM field being produced with another one. We first highlight that using two antennas and a vector network analyzer, three different estimations are possible and they are found experimentally to be almost equivalent. Second, removing one antenna the Q-factor may change mainly in the frequency range for which the Q-coefficient of an antenna is no more negligible. Furthermore a post-processing of these two types of measurements allows to extract an estimation of this Q-coefficient alone. This estimation is quite favorably compared to its theoretical estimation based on ideal random field hypothesis.