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Low SAR ferrite handset antenna design
The benefits resulting from the inclusion of ferrite in material loaded antennas are investigated, initially through the use of a spherical analytic model and then through a TLM simulation tool applied to a rectangular slab geometry. It is observed that a material with equality of relative permittiv...
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| Main Authors: | , , , , |
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| Format: | Default Article |
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2007
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| Online Access: | https://hdl.handle.net/2134/2949 |
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| _version_ | 1822547151439265792 |
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| author | Maria I. Kitra Chinthana Panagamuwa Patrick McEvoy J. C. Vardaxoglou J.R. James |
| author_facet | Maria I. Kitra Chinthana Panagamuwa Patrick McEvoy J. C. Vardaxoglou J.R. James |
| author_sort | Maria I. Kitra (7202540) |
| collection | Figshare |
| description | The benefits resulting from the inclusion of ferrite in material loaded antennas are investigated, initially through the use of a spherical analytic model and then through a TLM simulation tool applied to a rectangular slab geometry. It is observed that a material with equality of relative permittivity and permeability in combination with specific positioning of the antenna in relation to the head, can result in the definitive smallsize, high efficiency and bandwidth, low Specific Absorption Rate (SAR) antenna. The accuracy of the simulations is validated both through efficiency and SAR measurements of three material coated monopole samples. Further research into optimizing the above attributes and translating them into a handset antenna leads to a multi-band antenna design covering the GSM 1800, 1900, UMTS and Bluetooth bands, with a SAR value reduced by 88% compared to conventional phones and an efficiency of 38% at 1.8GHz. A tri-band antenna design is also presented, utilizing currently available lossy ferrite material and it is considered as the first step towards the feasibility of the ultimate low SAR multi-band ferrite handset antenna, until further material development specifically for antenna applications takes place. |
| format | Default Article |
| id | rr-article-9573506 |
| institution | Loughborough University |
| publishDate | 2007 |
| record_format | Figshare |
| spelling | rr-article-95735062007-01-01T00:00:00Z Low SAR ferrite handset antenna design Maria I. Kitra (7202540) Chinthana Panagamuwa (1258632) Patrick McEvoy (7207370) J. C. Vardaxoglou (1257960) J.R. James (7207373) Mechanical engineering not elsewhere classified ferrite loaded antennas multi-band Specific Absorption Rate (SAR) wireless handset Mechanical Engineering not elsewhere classified The benefits resulting from the inclusion of ferrite in material loaded antennas are investigated, initially through the use of a spherical analytic model and then through a TLM simulation tool applied to a rectangular slab geometry. It is observed that a material with equality of relative permittivity and permeability in combination with specific positioning of the antenna in relation to the head, can result in the definitive smallsize, high efficiency and bandwidth, low Specific Absorption Rate (SAR) antenna. The accuracy of the simulations is validated both through efficiency and SAR measurements of three material coated monopole samples. Further research into optimizing the above attributes and translating them into a handset antenna leads to a multi-band antenna design covering the GSM 1800, 1900, UMTS and Bluetooth bands, with a SAR value reduced by 88% compared to conventional phones and an efficiency of 38% at 1.8GHz. A tri-band antenna design is also presented, utilizing currently available lossy ferrite material and it is considered as the first step towards the feasibility of the ultimate low SAR multi-band ferrite handset antenna, until further material development specifically for antenna applications takes place. 2007-01-01T00:00:00Z Text Journal contribution 2134/2949 https://figshare.com/articles/journal_contribution/Low_SAR_ferrite_handset_antenna_design/9573506 CC BY-NC-ND 4.0 |
| spellingShingle | Mechanical engineering not elsewhere classified ferrite loaded antennas multi-band Specific Absorption Rate (SAR) wireless handset Mechanical Engineering not elsewhere classified Maria I. Kitra Chinthana Panagamuwa Patrick McEvoy J. C. Vardaxoglou J.R. James Low SAR ferrite handset antenna design |
| title | Low SAR ferrite handset antenna design |
| title_full | Low SAR ferrite handset antenna design |
| title_fullStr | Low SAR ferrite handset antenna design |
| title_full_unstemmed | Low SAR ferrite handset antenna design |
| title_short | Low SAR ferrite handset antenna design |
| title_sort | low sar ferrite handset antenna design |
| topic | Mechanical engineering not elsewhere classified ferrite loaded antennas multi-band Specific Absorption Rate (SAR) wireless handset Mechanical Engineering not elsewhere classified |
| url | https://hdl.handle.net/2134/2949 |