Direct Optimization of Quasi-Periodic Surfaces in Multi-Reflector Systems
| Autor: | Min Zhou, Erik Jorgensen, Oscar Borries, Michael Forum Palvig, Niels Vesterdal |
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| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
Computer science Aperture 020208 electrical & electronic engineering Mechanical engineering 020206 networking & telecommunications Reflector (antenna) 02 engineering and technology Selective surface Radiation pattern 0202 electrical engineering electronic engineering information engineering Satellite Antenna (radio) Quasi periodic |
| Zdroj: | 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. |
| Popis: | In recent years, there has been an increasing interest in replacing traditional periodic surfaces, e.g., frequency selective surfaces, with quasi-periodic surfaces (non-identical elements) in multi-reflector systems for satellite applications. Quasi-periodic surfaces can be used to improve existing antenna solutions or to provide innovative concepts not possible with periodic surfaces. In many scenarios, the periodic/quasi-periodic surface is used in a multi-reflector configuration, e.g., as a subreflector, where the design specifications are on the radiation pattern from the main reflector. For these applications, the design of the surface is usually carried out using an in-direct optimization approach which may provide sub-optimal designs. In this paper, we demonstrate the direct optimization of quasi-periodic surfaces for the final pattern performance. This means that all array elements in the quasi-periodic surface are optimized simultaneously to directly fulfill the goal specifications on the final pattern from the main aperture. |
| Databáze: | OpenAIRE |
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