Filter design and mode suppression inside metamaterial-filled rectangular waveguides
✍ Scribed by Sibel Çimen; Gonca Çakir; Levent Sevgi
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 624 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
A design procedure to optimize spherical lens antennas has been presented. The analysis method is based on a MMT implemented for spherically stratified structures and is combined with a PSO algorithm. Three lens antenna optimization problems are detailed to highlight the potentiality of the proposed methodology. First, both the Luneburg lens parameters and antenna characteristics are optimized to maximize the directivity. Then, the amplitude and position of each element of an array are optimized to shape the beam radiated by a lens antenna to comply with a given farfield mask. Finally, a reconfigurable lens antenna is designed with binary PSO. By switching properly the feeds, a pencil or a sectoral beam can be generated, avoiding thereby the use of any attenuator/amplifier. The good agreement between the optimized far-field radiation patterns computed by MMT and simulated with full wave software validates the proposed methodology.