A New Perspective on the Reactive Electromagnetic Energies and Q factors of Antennas
It is required to calculate the stored reactive energy of an antenna in order to evaluate its Q factor. Although it has been investigated for a long time, some issues still need further clarification. The main difficulty involved is that the reactive energy of an antenna tends to become infinitely l...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9201586/ |
| _version_ | 1811274477876543488 |
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| author | Gaobiao Xiao Can Xiong Shifeng Huang Rui Liu Yuyang Hu |
| author_facet | Gaobiao Xiao Can Xiong Shifeng Huang Rui Liu Yuyang Hu |
| author_sort | Gaobiao Xiao |
| collection | DOAJ |
| description | It is required to calculate the stored reactive energy of an antenna in order to evaluate its Q factor. Although it has been investigated for a long time, some issues still need further clarification. The main difficulty involved is that the reactive energy of an antenna tends to become infinitely large when integrating the conventionally defined energy density in the whole space outside a small sphere containing the antenna. The reactive energy is usually made to be bounded by subtracting an additional term associated with the radiation fields. However, there exists no well-accepted accurate definition for this additional term that is valid for all cases. By re-checking the definition of reactive energies, an alternative formulation is proposed in this paper which can separate the reactive energy and the radiation energy explicitly based on source-potentials. The clearly defined reactive energy is bounded without necessity to subtract that additional term, and the resultant formulae are easy to implement. |
| first_indexed | 2024-04-12T23:19:52Z |
| format | Article |
| id | doaj.art-ca8385318f8f4d94bc00d167ab55e982 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-12T23:19:52Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-ca8385318f8f4d94bc00d167ab55e9822022-12-22T03:12:34ZengIEEEIEEE Access2169-35362020-01-01817379017380310.1109/ACCESS.2020.30248889201586A New Perspective on the Reactive Electromagnetic Energies and Q factors of AntennasGaobiao Xiao0https://orcid.org/0000-0001-5547-9475Can Xiong1https://orcid.org/0000-0003-3993-6319Shifeng Huang2https://orcid.org/0000-0003-2198-3483Rui Liu3https://orcid.org/0000-0002-4996-9723Yuyang Hu4https://orcid.org/0000-0003-3585-9926Key Laboratory of Ministry of Education of Design and Electromagnetic Compatibility of High-Speed Electronic Systems, Shanghai Jiao Tong University, Shanghai, ChinaKey Laboratory of Ministry of Education of Design and Electromagnetic Compatibility of High-Speed Electronic Systems, Shanghai Jiao Tong University, Shanghai, ChinaKey Laboratory of Ministry of Education of Design and Electromagnetic Compatibility of High-Speed Electronic Systems, Shanghai Jiao Tong University, Shanghai, ChinaKey Laboratory of Ministry of Education of Design and Electromagnetic Compatibility of High-Speed Electronic Systems, Shanghai Jiao Tong University, Shanghai, ChinaKey Laboratory of Ministry of Education of Design and Electromagnetic Compatibility of High-Speed Electronic Systems, Shanghai Jiao Tong University, Shanghai, ChinaIt is required to calculate the stored reactive energy of an antenna in order to evaluate its Q factor. Although it has been investigated for a long time, some issues still need further clarification. The main difficulty involved is that the reactive energy of an antenna tends to become infinitely large when integrating the conventionally defined energy density in the whole space outside a small sphere containing the antenna. The reactive energy is usually made to be bounded by subtracting an additional term associated with the radiation fields. However, there exists no well-accepted accurate definition for this additional term that is valid for all cases. By re-checking the definition of reactive energies, an alternative formulation is proposed in this paper which can separate the reactive energy and the radiation energy explicitly based on source-potentials. The clearly defined reactive energy is bounded without necessity to subtract that additional term, and the resultant formulae are easy to implement.https://ieeexplore.ieee.org/document/9201586/Reactive energyelectric energy densitymagnetic energy densityQ factorradiation energy |
| spellingShingle | Gaobiao Xiao Can Xiong Shifeng Huang Rui Liu Yuyang Hu A New Perspective on the Reactive Electromagnetic Energies and Q factors of Antennas IEEE Access Reactive energy electric energy density magnetic energy density Q factor radiation energy |
| title | A New Perspective on the Reactive Electromagnetic Energies and Q factors of Antennas |
| title_full | A New Perspective on the Reactive Electromagnetic Energies and Q factors of Antennas |
| title_fullStr | A New Perspective on the Reactive Electromagnetic Energies and Q factors of Antennas |
| title_full_unstemmed | A New Perspective on the Reactive Electromagnetic Energies and Q factors of Antennas |
| title_short | A New Perspective on the Reactive Electromagnetic Energies and Q factors of Antennas |
| title_sort | new perspective on the reactive electromagnetic energies and q factors of antennas |
| topic | Reactive energy electric energy density magnetic energy density Q factor radiation energy |
| url | https://ieeexplore.ieee.org/document/9201586/ |
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