Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-Band
This paper presents a novel multibeam transmitting dual-reflectarray antenna able to generate a complete multiple spot coverage from a geostationary satellite in Ka-band (20 GHz). The bifocal design technique has been exploited for the first time to reduce by 50% the beam deviation factor with respe...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-06-01
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| Series: | Electronics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-9292/9/6/961 |
| _version_ | 1797565763747315712 |
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| author | Eduardo Martinez-de-Rioja Jose A. Encinar Giovanni Toso |
| author_facet | Eduardo Martinez-de-Rioja Jose A. Encinar Giovanni Toso |
| author_sort | Eduardo Martinez-de-Rioja |
| collection | DOAJ |
| description | This paper presents a novel multibeam transmitting dual-reflectarray antenna able to generate a complete multiple spot coverage from a geostationary satellite in Ka-band (20 GHz). The bifocal design technique has been exploited for the first time to reduce by 50% the beam deviation factor with respect to the equivalent monofocal antenna, allowing to produce adjacent beams separated by only 0.56° in the antenna offset plane. In order to guarantee an acceptable spillover, the main reflectarray has been oversized in the same plane where the beams are compressed, resulting in an elliptical reflectarray of 3.5 m × 1.8 m. The interleaved beams required to provide the complete multi-spot coverage are produced in the orthogonal polarization, using the same aperture and feeds. The proposed antenna requires a smaller main aperture (about half of the area) and a lower number of feeds than other configurations that use a single oversized reflector to generate a complete multi-spot coverage, showing promising results for communication satellite applications in the Ka-band. |
| first_indexed | 2024-03-10T19:16:40Z |
| format | Article |
| id | doaj.art-174300bde46d422cb3fb745caa0a52f4 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T19:16:40Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-174300bde46d422cb3fb745caa0a52f42023-11-20T03:16:50ZengMDPI AGElectronics2079-92922020-06-019696110.3390/electronics9060961Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-BandEduardo Martinez-de-Rioja0Jose A. Encinar1Giovanni Toso2Area of Signal Theory and Communications, Universidad Rey Juan Carlos, 28943 Fuenlabrada, SpainInformation Processing and Telecommunications Center, Universidad Politécnica de Madrid, 28040 Madrid, SpainAntenna and Sub-Millimeter Wave Section, European Space Agency ESTEC, 2200 AG Noordwijk, The NetherlandsThis paper presents a novel multibeam transmitting dual-reflectarray antenna able to generate a complete multiple spot coverage from a geostationary satellite in Ka-band (20 GHz). The bifocal design technique has been exploited for the first time to reduce by 50% the beam deviation factor with respect to the equivalent monofocal antenna, allowing to produce adjacent beams separated by only 0.56° in the antenna offset plane. In order to guarantee an acceptable spillover, the main reflectarray has been oversized in the same plane where the beams are compressed, resulting in an elliptical reflectarray of 3.5 m × 1.8 m. The interleaved beams required to provide the complete multi-spot coverage are produced in the orthogonal polarization, using the same aperture and feeds. The proposed antenna requires a smaller main aperture (about half of the area) and a lower number of feeds than other configurations that use a single oversized reflector to generate a complete multi-spot coverage, showing promising results for communication satellite applications in the Ka-band.https://www.mdpi.com/2079-9292/9/6/961bifocal antennasdual-reflectarray antennasKa-bandmultibeam antennasmultispot coveragesatellite communications |
| spellingShingle | Eduardo Martinez-de-Rioja Jose A. Encinar Giovanni Toso Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-Band Electronics bifocal antennas dual-reflectarray antennas Ka-band multibeam antennas multispot coverage satellite communications |
| title | Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-Band |
| title_full | Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-Band |
| title_fullStr | Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-Band |
| title_full_unstemmed | Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-Band |
| title_short | Bifocal Dual-Reflectarray Antenna to Generate a Complete Multiple Spot Beam Coverage for Satellite Communications in Ka-Band |
| title_sort | bifocal dual reflectarray antenna to generate a complete multiple spot beam coverage for satellite communications in ka band |
| topic | bifocal antennas dual-reflectarray antennas Ka-band multibeam antennas multispot coverage satellite communications |
| url | https://www.mdpi.com/2079-9292/9/6/961 |
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