X BAND TWO LAYER PRINTED REFLECTARRAY WITH SHAPED BEAM Ü / ç / ü / ncü / , Gö / khan MSc., Department of Electrical and Electronics Engineering Supervisor: Prof. Dr. H. Ö / zlem Aydin Ç / ivi October, 2011, 110 pages X-band cosecant square shaped beam microstrip reflectarray is designed, fabricated and measured. Unit element of the reflectarray is in stacked patch configuration. With the aim of designing shaped beam pattern, phase-only synthesis method based on genetic algorithm is used. Phases of reflected electric field from antenna elements are adjusted by changing the dimensions of the patches. Unit cell simulations are performed using periodic boundary conditions and assuming infinite array approach to obtain reflection phase curves versus patch size. Then full reflectarray surface and its feed are designed and fabricated. Radiation patterns are measured in spherical near field range and results are compared with simulations. It is shown that the antenna is capable to operate in a band of 8.6 - 9.7 GHz.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613897/index.pdf |
| Date | 01 October 2011 |
| Creators | Ucuncu, Gokhan |
| Contributors | Aydin Civi, Hatice Ozlem |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
Page generated in 0.0018 seconds