Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters
Filters for the suppression of the RF disturbances in power lines are passive; wideband stop filters attenuating common as well as differential disturbances should be insensitive to the variation in the impedance at the input and the output. The design and verification process of such filters differ...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/12/4/821 |
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| author | Michał Borecki Jan Sroka |
| author_facet | Michał Borecki Jan Sroka |
| author_sort | Michał Borecki |
| collection | DOAJ |
| description | Filters for the suppression of the RF disturbances in power lines are passive; wideband stop filters attenuating common as well as differential disturbances should be insensitive to the variation in the impedance at the input and the output. The design and verification process of such filters differs entirely from that used for the signal RF filters. In the document CISPR 17, entitled “Methods of measurement of the suppression characteristics of passive EMC filtering devices”, two definitions of the attenuation of the common and differential modes are presented. The first is simply direct measurement, and the second is based on a calculation using the single-ended S-parameters of the multiport. These two definitions are the source of diversity. In this paper, we hypothesize that the attenuations achieved with these two methods are identical only if the filter is in perfect balance. Consequently, different attenuations can be achieved. The requirement of balance can be violated due to the tolerances of the components used in the filter. The paper begins with a simple unbalanced four-port, for which analytical formulas are derived. It is also shown that an approach with single-ended S-parameters enables the calculation of the mode conversion between the input and the output, which is called the conversion loss. This is the measure of the grade of the imbalance. Thereafter, the common-mode attenuation of an exemplary RF suppression filter is derived with the presented methods. Additionally, the conversion loss of the filter is calculated. The comparison of the conversion loss with both attenuations is satisfactory, proving the hypothesis formulated in the paper. |
| first_indexed | 2024-03-11T08:54:54Z |
| format | Article |
| id | doaj.art-5cdcc2c445914aa0868424207c98ed7d |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-11T08:54:54Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-5cdcc2c445914aa0868424207c98ed7d2023-11-16T20:10:33ZengMDPI AGElectronics2079-92922023-02-0112482110.3390/electronics12040821Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line FiltersMichał Borecki0Jan Sroka1Institute of Theory of Electrical Engineering, Warsaw University of Technology, 00-662 Warsaw, PolandInstitute of Theory of Electrical Engineering, Warsaw University of Technology, 00-662 Warsaw, PolandFilters for the suppression of the RF disturbances in power lines are passive; wideband stop filters attenuating common as well as differential disturbances should be insensitive to the variation in the impedance at the input and the output. The design and verification process of such filters differs entirely from that used for the signal RF filters. In the document CISPR 17, entitled “Methods of measurement of the suppression characteristics of passive EMC filtering devices”, two definitions of the attenuation of the common and differential modes are presented. The first is simply direct measurement, and the second is based on a calculation using the single-ended S-parameters of the multiport. These two definitions are the source of diversity. In this paper, we hypothesize that the attenuations achieved with these two methods are identical only if the filter is in perfect balance. Consequently, different attenuations can be achieved. The requirement of balance can be violated due to the tolerances of the components used in the filter. The paper begins with a simple unbalanced four-port, for which analytical formulas are derived. It is also shown that an approach with single-ended S-parameters enables the calculation of the mode conversion between the input and the output, which is called the conversion loss. This is the measure of the grade of the imbalance. Thereafter, the common-mode attenuation of an exemplary RF suppression filter is derived with the presented methods. Additionally, the conversion loss of the filter is calculated. The comparison of the conversion loss with both attenuations is satisfactory, proving the hypothesis formulated in the paper.https://www.mdpi.com/2079-9292/12/4/821RF disturbancepower line filterattenuationconversion losscommon modemultiport |
| spellingShingle | Michał Borecki Jan Sroka Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters Electronics RF disturbance power line filter attenuation conversion loss common mode multiport |
| title | Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters |
| title_full | Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters |
| title_fullStr | Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters |
| title_full_unstemmed | Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters |
| title_short | Diversity Pertaining to the Attenuation of the RF Disturbance Suppression Power Line Filters |
| title_sort | diversity pertaining to the attenuation of the rf disturbance suppression power line filters |
| topic | RF disturbance power line filter attenuation conversion loss common mode multiport |
| url | https://www.mdpi.com/2079-9292/12/4/821 |
| work_keys_str_mv | AT michałborecki diversitypertainingtotheattenuationoftherfdisturbancesuppressionpowerlinefilters AT jansroka diversitypertainingtotheattenuationoftherfdisturbancesuppressionpowerlinefilters |