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Frequency selective surfaces

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  1. Tez No: 403137
  2. Yazar: ERDOĞAN KAYGAN
  3. Danışmanlar: Belirtilmemiş.
  4. Tez Türü: Yüksek Lisans
  5. Konular: Elektrik ve Elektronik Mühendisliği, Kimya Mühendisliği, Mühendislik Bilimleri, Electrical and Electronics Engineering, Chemical Engineering, Engineering Sciences
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2012
  8. Dil: İngilizce
  9. Üniversite: The University of Kent
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 61

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Özet (Çeviri)

In this dlssertatlon Flnlte, Finite with metal screen and Infinite FSS structures based on circular ring elements are presented. The background theory of FSS principles is also described. The objectives are to assess performance of FSS structures at angle of 0°, 30°and 60° which desired frequency is between 2 GHz and 5GHz. Then to investigate that 1x1 and 2x2 Infinite FSS designs block the transmission signals at the same frequency as theoretically proved. Also the transmission value for Finite FSS design is aimed to reduce further. The project takes places into two stages. Initial stage is software simulation stage. The design of FSS structure was carried out by CST Microwave Studio which is a powerful electromagnetic field simulation program. Rings are selected as elements of FSS structures, because of less sensitivity when plane waves rotate to different angles (30° and 60°). After desired frequency achieved, second stage are take place which is a measurement setup. In measurement setup, real fabrication of FSS structures is followed by network analyzer. Completion of simulation and measurement process, the comparison results for both simulated and measured FSS are performed almost same which shows that FSS designs performed well. The desired frequency which was between 2 GHz and 5GHz, an all polarizations (TE and TM) and at angles 0°, 30°, and 60° are achieved. In overall Finite, Finite with metal screen and Infinite FSS design are demonstrated and it can be clearly described that finite with metal screen FSS reduced the transmission signals further than Finite FSS. Also it holds the highest resonant frequencies in all polarization with 3.34 GHz and 3.322 GHz. According to bandwidth calculation values, Finite FSS in measurement results quite lower than infinite and finite with metal screen FSS design. Transverse Electric (TE) polarization in all FSS design provides good stability on variation of angle than Transverse Magnetic (TM); especially stability is improved in Finite with metal screen FSS design. In addition to all, Finite and Infinite FSS designs have quite similar results than Finite with metal screen FSS.

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