Abstract
Direct-to-home (DTH) applications usually require a radiation pattern with a given footprint on the surface of the Earth and impose stringent cross-polarization requirements in the form of crosspolar discrimination (XPD) or crosspolar isolation in a given bandwidth. This paper describes a multi-frequency broadband optimization procedure and performance results of a very large spaceborne reflectarray for DTH application in a 10% bandwidth. The proposed design methodology is based on the generalized intersection approach and the use of a multi-resonant unit cell with multiple degrees of freedom (DoF). The procedure is divided into three stages to facilitate convergence towards a broadband performance. First, a initial narrowband design at central frequency is obtain. Then, a broadband optimization including XPD requirements is carried out with a limited number of DoF. Finally, more DoF are included in the last stage optimization to obtain a broadband reflectarray with improved cross-polarization performance.
Original language | English |
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Title of host publication | 2020 International Workshop on Antenna Technology (iWAT) |
Publisher | IEEE |
ISBN (Electronic) | 9781728126401 |
DOIs | |
Publication status | Published - 13 May 2020 |
Event | 2020 International Workshop on Antenna Technology - Bucharest, Romania Duration: 25 Feb 2020 → 28 Feb 2020 |
Conference
Conference | 2020 International Workshop on Antenna Technology |
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Abbreviated title | iWAT 2020 |
Country/Territory | Romania |
City | Bucharest |
Period | 25/02/20 → 28/02/20 |
Keywords
- Generalized intersection approach
- Optimization
- Reflectarrays
- Shaped-Beam
- Space communications
ASJC Scopus subject areas
- Computer Networks and Communications
- Electronic, Optical and Magnetic Materials
- Instrumentation