Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics
This paper presents an antenna array organized in sub-arrays and composed of densely spaced dielectric-based radiating elements. To reduce the number of active components required in the array beamforming network, each sub-array consists of a single active element, directly fed, and several passive...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9900303/ |
| _version_ | 1811251236991664128 |
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| author | Ronis Maximidis Diego Caratelli Giovanni Toso A. Bart Smolders |
| author_facet | Ronis Maximidis Diego Caratelli Giovanni Toso A. Bart Smolders |
| author_sort | Ronis Maximidis |
| collection | DOAJ |
| description | This paper presents an antenna array organized in sub-arrays and composed of densely spaced dielectric-based radiating elements. To reduce the number of active components required in the array beamforming network, each sub-array consists of a single active element, directly fed, and several passive reactively loaded elements. State-of-the-art implementations of such arrays are typically based on rectangular air-filled waveguide radiators which provide a limited bandwidth and support a single linear polarization only. By utilizing the dielectric-based radiators presented in this work, a significant increase in the operating bandwidth of the array can be achieved. In this case, the aforementioned reactive loading is implemented through short-circuited dielectric-filled waveguides. By optimizing the position of the short circuits, the radiation pattern of the sub-array can be controlled and synthesized according to a given mask. To create larger design flexibility, one can design the sub-array in the presence of the adjacent sub-arrays, achieving in this way their effective overlapping. By employing the considered design technique, a sub-array featuring flat-top radiation pattern characteristics in combination with low side-lobe levels and high gain was developed, manufactured, and thoroughly analyzed. An additional benefit of such a design choice is the possibility of supporting two orthogonal polarizations. |
| first_indexed | 2024-04-12T16:16:48Z |
| format | Article |
| id | doaj.art-bc6283c3685b4931a9d2e411eceafac6 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-12T16:16:48Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-bc6283c3685b4931a9d2e411eceafac62022-12-22T03:25:42ZengIEEEIEEE Access2169-35362022-01-011010832010833110.1109/ACCESS.2022.32089549900303Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern CharacteristicsRonis Maximidis0https://orcid.org/0000-0002-4474-084XDiego Caratelli1Giovanni Toso2https://orcid.org/0000-0002-0301-5289A. Bart Smolders3https://orcid.org/0000-0001-6115-0123Department of Electrical Engineering, Electromagnetics Group, Eindhoven University of Technology, Eindhoven, The NetherlandsDepartment of Electrical Engineering, Electromagnetics Group, Eindhoven University of Technology, Eindhoven, The NetherlandsRadio Frequency Payloads & Technology Division, Antenna and Sub-Millimeter Waves Section, European Space Agency, ESA ESTEC, Noordwijk, The NetherlandsDepartment of Electrical Engineering, Electromagnetics Group, Eindhoven University of Technology, Eindhoven, The NetherlandsThis paper presents an antenna array organized in sub-arrays and composed of densely spaced dielectric-based radiating elements. To reduce the number of active components required in the array beamforming network, each sub-array consists of a single active element, directly fed, and several passive reactively loaded elements. State-of-the-art implementations of such arrays are typically based on rectangular air-filled waveguide radiators which provide a limited bandwidth and support a single linear polarization only. By utilizing the dielectric-based radiators presented in this work, a significant increase in the operating bandwidth of the array can be achieved. In this case, the aforementioned reactive loading is implemented through short-circuited dielectric-filled waveguides. By optimizing the position of the short circuits, the radiation pattern of the sub-array can be controlled and synthesized according to a given mask. To create larger design flexibility, one can design the sub-array in the presence of the adjacent sub-arrays, achieving in this way their effective overlapping. By employing the considered design technique, a sub-array featuring flat-top radiation pattern characteristics in combination with low side-lobe levels and high gain was developed, manufactured, and thoroughly analyzed. An additional benefit of such a design choice is the possibility of supporting two orthogonal polarizations.https://ieeexplore.ieee.org/document/9900303/Dielectricantennaswaveguidesoverlappingflat-topreactive |
| spellingShingle | Ronis Maximidis Diego Caratelli Giovanni Toso A. Bart Smolders Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics IEEE Access Dielectric antennas waveguides overlapping flat-top reactive |
| title | Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics |
| title_full | Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics |
| title_fullStr | Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics |
| title_full_unstemmed | Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics |
| title_short | Reactively Loaded Dielectric-Based Antenna Arrays With Enhanced Bandwidth and Flat-Top Radiation Pattern Characteristics |
| title_sort | reactively loaded dielectric based antenna arrays with enhanced bandwidth and flat top radiation pattern characteristics |
| topic | Dielectric antennas waveguides overlapping flat-top reactive |
| url | https://ieeexplore.ieee.org/document/9900303/ |
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