{"title":"真实自由空间天线系数验证完全吸收器衬里腔室?","authors":"D.J. Groot Boerle, F. Leferink","doi":"10.1109/ISEMC.1996.561219","DOIUrl":null,"url":null,"abstract":"The validation of a completely absorber lined chamber (CALC) turned out to be difficult. The first attempt was made with antennas calibrated on an open area test site (OATS). In this case a correction factor was necessary, this factor is related to the ground reflection and thus to the antennas. The validation started with determining the real free space antenna factors (AF/sub FS/). These real free space antenna factors were used for new site attenuation measurements in the CALC. The goal has been to validate the CALC by means of practical measurements. As a result the CALC can meet the normalized site attenuation (NSA) requirements. Because of near field effects and mutual coupling a minor problem area below 80 MHz remains, this problem was not dealt with. In our opinion the CALC should replace the OATS as the reference site. In conclusion, a CALC is the best test site for compliance testing for both immunity and emission, and all radiated EMC-measurements should be normalized to free space.","PeriodicalId":296175,"journal":{"name":"Proceedings of Symposium on Electromagnetic Compatibility","volume":"138 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1996-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"Real free space antenna factors for validating completely absorber lined chambers?\",\"authors\":\"D.J. Groot Boerle, F. Leferink\",\"doi\":\"10.1109/ISEMC.1996.561219\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The validation of a completely absorber lined chamber (CALC) turned out to be difficult. The first attempt was made with antennas calibrated on an open area test site (OATS). In this case a correction factor was necessary, this factor is related to the ground reflection and thus to the antennas. The validation started with determining the real free space antenna factors (AF/sub FS/). These real free space antenna factors were used for new site attenuation measurements in the CALC. The goal has been to validate the CALC by means of practical measurements. As a result the CALC can meet the normalized site attenuation (NSA) requirements. Because of near field effects and mutual coupling a minor problem area below 80 MHz remains, this problem was not dealt with. In our opinion the CALC should replace the OATS as the reference site. In conclusion, a CALC is the best test site for compliance testing for both immunity and emission, and all radiated EMC-measurements should be normalized to free space.\",\"PeriodicalId\":296175,\"journal\":{\"name\":\"Proceedings of Symposium on Electromagnetic Compatibility\",\"volume\":\"138 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1996-08-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of Symposium on Electromagnetic Compatibility\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISEMC.1996.561219\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of Symposium on Electromagnetic Compatibility","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISEMC.1996.561219","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Real free space antenna factors for validating completely absorber lined chambers?
The validation of a completely absorber lined chamber (CALC) turned out to be difficult. The first attempt was made with antennas calibrated on an open area test site (OATS). In this case a correction factor was necessary, this factor is related to the ground reflection and thus to the antennas. The validation started with determining the real free space antenna factors (AF/sub FS/). These real free space antenna factors were used for new site attenuation measurements in the CALC. The goal has been to validate the CALC by means of practical measurements. As a result the CALC can meet the normalized site attenuation (NSA) requirements. Because of near field effects and mutual coupling a minor problem area below 80 MHz remains, this problem was not dealt with. In our opinion the CALC should replace the OATS as the reference site. In conclusion, a CALC is the best test site for compliance testing for both immunity and emission, and all radiated EMC-measurements should be normalized to free space.
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