Disletric resonator antenna array at 2.4 GHz
For many years, the dielectric resonator (DR) has primarily been used in microwave circuits, such as oscillators and filters [1], where the DR is normally made of high-permittivity material, with dielectric constant r H > 20. The unloaded Q-factor is usually between 50 and 500, but can...
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| Format: | Book Section |
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Penerbit UTM
2007
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| _version_ | 1796855243016765440 |
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| author | Masri, Thelaha A. Rahim, Mohamad Kamal |
| author_facet | Masri, Thelaha A. Rahim, Mohamad Kamal |
| author_sort | Masri, Thelaha |
| collection | ePrints |
| description | For many years, the dielectric resonator (DR) has primarily been used in microwave circuits, such as oscillators and filters [1], where the DR is normally made of high-permittivity material, with dielectric constant r H > 20. The unloaded Q-factor is usually between 50 and 500, but can be as high as 10,000. Because of these traditional applications, the DR was usually treated as an energy storage device rather than as a radiator. Although open DRs were found to radiate many years ago [1-2], the idea of using the DR as an antenna had not been widely accepted until the original paper on the cylindrical dielectric resonator antenna (DRA) [3] was published in 1983. At that time, it was observed that the frequency range of interest for many systems had gradually progressed upward to the millimeter and near-millimeter range (100- 300 GHz). At these frequencies, the conductor loss of metallic antennas becomes severe and the efficiency of the antennas is reduced significantly. Conversely, the only loss for a DRA is that due to the imperfect dielectric material, which can be very small in practice. The work created the foundation for future investigations of the DRA. Different shapes of DRA were also studied, including the rectangular, circular, triangular, spherical-cap, and cylindrical-ring DRAs [4]. It was found that DRAs operating at their fundamental modes radiate like a magnetic dipole, independent of their shapes. |
| first_indexed | 2024-03-05T18:25:47Z |
| format | Book Section |
| id | utm.eprints-13453 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T18:25:47Z |
| publishDate | 2007 |
| publisher | Penerbit UTM |
| record_format | dspace |
| spelling | utm.eprints-134532011-08-08T03:59:51Z http://eprints.utm.my/13453/ Disletric resonator antenna array at 2.4 GHz Masri, Thelaha A. Rahim, Mohamad Kamal TK Electrical engineering. Electronics Nuclear engineering For many years, the dielectric resonator (DR) has primarily been used in microwave circuits, such as oscillators and filters [1], where the DR is normally made of high-permittivity material, with dielectric constant r H > 20. The unloaded Q-factor is usually between 50 and 500, but can be as high as 10,000. Because of these traditional applications, the DR was usually treated as an energy storage device rather than as a radiator. Although open DRs were found to radiate many years ago [1-2], the idea of using the DR as an antenna had not been widely accepted until the original paper on the cylindrical dielectric resonator antenna (DRA) [3] was published in 1983. At that time, it was observed that the frequency range of interest for many systems had gradually progressed upward to the millimeter and near-millimeter range (100- 300 GHz). At these frequencies, the conductor loss of metallic antennas becomes severe and the efficiency of the antennas is reduced significantly. Conversely, the only loss for a DRA is that due to the imperfect dielectric material, which can be very small in practice. The work created the foundation for future investigations of the DRA. Different shapes of DRA were also studied, including the rectangular, circular, triangular, spherical-cap, and cylindrical-ring DRAs [4]. It was found that DRAs operating at their fundamental modes radiate like a magnetic dipole, independent of their shapes. Penerbit UTM 2007 Book Section PeerReviewed Masri, Thelaha and A. Rahim, Mohamad Kamal (2007) Disletric resonator antenna array at 2.4 GHz. In: Advanced Antenna Technology Design. Penerbit UTM , Johor, pp. 126-139. ISBN 978-983-52-0667-2 http://dx.doi.org/10.1109/APMC.2008.4958543 doi:10.1109/APMC.2008.4958543 |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering Masri, Thelaha A. Rahim, Mohamad Kamal Disletric resonator antenna array at 2.4 GHz |
| title | Disletric resonator antenna array at 2.4 GHz |
| title_full | Disletric resonator antenna array at 2.4 GHz |
| title_fullStr | Disletric resonator antenna array at 2.4 GHz |
| title_full_unstemmed | Disletric resonator antenna array at 2.4 GHz |
| title_short | Disletric resonator antenna array at 2.4 GHz |
| title_sort | disletric resonator antenna array at 2 4 ghz |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
| work_keys_str_mv | AT masrithelaha disletricresonatorantennaarrayat24ghz AT arahimmohamadkamal disletricresonatorantennaarrayat24ghz |