Effect of Symmetry on Insertion Loss in SRR and CSRR Transmitarray Unit Cells Implementing the Element Rotation Method

2018-08-01
ERDIL, Emre
TOPALLI, Kagan
Aydın Çivi, Hatice Özlem
Insertion loss variation with respect to rotation angle is examined for geometrically symmetrical and unsymmetrical split ring resonators (SRR) and complementary split ring resonators (CSRR) transmitarray unit cells implementing the element rotation method. Generalized design conditions for the implementation of the method on transmitarrays are derived. Based on the S-parameters obtained by full-wave electromagnetic simulations and field analysis, it is shown that the symmetry of CSRR unit cells has an important effect on decreasing insertion loss variation with respect to rotation angle. Up to 3 dB improvement in insertion loss is achieved for the symmetrical single ring double split CSRR type unit cell. It is also shown for two nested non symmetric SRR unit cells that, insertion loss is almost independent of the element rotation when the transmission is mainly provided by the symmetrical part of the unit cell.
APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL

Suggestions

Effect of isomorphic atom substitution on the lattice parameters and the optical absorption edge of TlGaSe2-TlInSe2 mixed crystals
Gasanly, N. M. (2006-05-01)
The variation of lattice parameters of TlGaSe2-TlInSe2 mixed crystals with composition have been investigated by using of X-ray diffraction technique. For the mixed crystals studied, a structural phase transition (monoclinic to tetragonal) due to atom substitution is observed when the sum of the tetrahedral covalent radii of the Ga(In) and the Se atoms in Ga(In)Se-4 tetrahedra reaches a critical value of about 0.254 nm. From transmission and reflection measurements, the compositional dependence of the indir...
Effects of geometric factors on mode I fracture toughness for modified ring tests
Tutluoğlu, Levend (2012-04-01)
Stress intensity factors of specimen models with various external diameters, inner hole diameters, and extents of flattened loading boundaries for the modified ring testing method for mode I fracture are computed by finite element modeling. Effects of boundary conditions and geometric factors on stress intensity factor computation are analyzed. Parametric expressions are proposed to estimate critical crack length position and corresponding maximum stress intensity factor. An expression in terms of inner hol...
Effect of isomorphic atom substitution on lattice parameters of TlBX2-type mixed crystals
Özkan, Hüsnü; Hasanlı, Nızamı; Çulfaz, Ali (1996-12-01)
The variation of the lattice parameters of TlBX2-type mixed crystals with composition have been investigated by X-ray diffraction technique. The lattice anisotropy (c/a) of the mixed crystals changes linearly depending on substitution of the atoms located both at the centre and at the vertices of the BX4 tetrahedra. For some of the mixed crystals studied, structural phase transition (monoclinic ⇌ tetragonal) is observed due to atom substitution when the sum of tetrahedral covalent radii of the B and X atoms...
Effect of isomorphic atom substitution on the lattice parameters and the optical absorption edge of TIGaSe2-TllnSe2 mixed crystals
Hasanlı, Nızamı (2006-05-01)
The variation of lattice parameters of TlGaSe2-TlInSe 2 mixed crystals with composition have been investigated by using of X-ray diffraction technique. For the mixed crystals studied, a structural phase transition (monoclinic to tetragonal) due to atom substitution is observed when the sum of the tetrahedral covalent radii of the Ga(In) and the Se atoms in Ga(In)Se4 tetrahedra reaches a critical value of about 0.254 nm. From transmission and reflection measurements, the compositional dependence of the indir...
Effect of Y Addition on the Structural Properties and Oxidation Behavior of Fe60Al40-nYn Alloys (n=1, 3, and 5 at.%)
Yildirim, Mehmet; Atas, Mehmet Sahin; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2022-04-01)
The influence of Y addition on the microstructural features, phase relationships, hardness, magnetic behaviour and cyclic oxidation performance of Fe60Al40-nYn alloys (n = 1, 3, and 5 at.%) has been examined in detail. Al8Fe4Y phase formed even at 1 at.% Y addition because of the limited solid solubility of Y in the FeAl-based phase. For all the examined compositions, the Al8Fe4Y phase developed a eutectic with the FeAl-based phase and its volume fraction increased with increasing Y up to 5 at.%, which is n...
Citation Formats
E. ERDIL, K. TOPALLI, and H. Ö. Aydın Çivi, “Effect of Symmetry on Insertion Loss in SRR and CSRR Transmitarray Unit Cells Implementing the Element Rotation Method,” APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL, pp. 835–841, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54286.