Effects of Array Dimensions on the Resonance Characteristics of SRR Type Metamaterial Arrays with Small Sizes: Simulations and Experiments

2009-08-21
Ekmekci, E.
Topalli, K.
Akın, Tayfun
Sayan, Gönül
It has been discussed in various studies that two dimensional periodical arrays of SRRs with large array sizes have wider stop bandwidths and lower transmission magnitudes around their resonance frequencies as compared to the single SRR unit cell. In this paper, effects of array dimensions on the transmission characteristics of SRR arrays are investigated in more detail especially for small sized arrays in a comparative manner. For this purpose, various SRR arrays with small array sizes are fabricated and their transmission characteristics are measured by Agilent 8720D network analyzer. The measurement results are verified by the full-wave electromagnetic simulation results obtained from Ansoft's HFSS software. In conclusion, it is demonstrated that increasing array dimensions increases the depth of the transmission minimum and widens the stop bandwidth, as expected. Furthermore, interestingly observed that resonance frequency of the SRR array shifts either towards the lower frequencies or towards the higher frequencies depending upon the dimension at which the number of array elements is increased. This behavior is interpreted as a result of different coupling effects in two different dimensions due to the inherent asymmetry of the two-dimensional SRR arrays implemented in this study.

Suggestions

Effects of Substrate Parameters on the Resonance Frequency of Double-sided SRR Structures under Two Different Excitations
Ekmekci, E.; Averitt, R. D.; Sayan, Gönül (2010-07-08)
In this study, we numerically investigate the effects of substrate parameters (i.e., the thickness and the permittivity) on the resonance frequency of the double-sided SRR (DSRR) structure under two different excitation conditions. This includes either electric or magnetic excitations which are two common techniques to obtain a resonant effective permittivity or permeability, respectively. The numerical calculations are performed using CST Microwave Studio. The numerical results reveal a similar trend in th...
EFFECT OF MOBILITY ON (IV) CHARACTERISTICS OF GaAs MESFET
Saidi, Y.; Alliouat, W.; Hamma, I.; Zaabat, M.; Azizi, M.; Azizi, C. (2011-09-10)
We present in this paper an analytical model of the current voltage (I-V) characteristics for submicron GaAs MESFET transistors. This model takes account the analysis of the charge distribution in the active region and incorporate a field depended electron mobility, velocity saturation and charge build-up in the channel.we propose In this framework an algorithm of simulation based on mathematical expressions obtained previously. The results obtained of the model are discussed and compared with those of the ...
Analysis of quantum-dot-embedded multicavity arrays for on-chip WDM applications
Erdinc, Havva; Kocaman, Serdar (2018-01-01)
Transmission and group delay characteristics of a single-quantum-dot-(QD)-embedded double-cavity array and a triple-cavity array are compared theoretically in the weak coupling regime. When the extrinsic cavity decay rate is comparably higher than the intrinsic cavity decay rate at equal coupling strengths and normalized detuning values, transmission values of both systems converge with each other but the phase delay generated at triple-cavity systems is higher than that of the single-QD-embedded double-cav...
Design and Analysis of a Perfect Metamaterial Absorber for Sub-Terahertz Frequencies
Sabah, Cumali; Wellmann, Thorsten; Voss, Daniel; Zouaghi, Wissem; Roskos, Hartmut G. (2015-08-27)
A new near-perfect metamaterial absorber (MA) consisting of a square resonator with gaps and cross-wire strips is presented for the sub-terahertz frequency range. A narrow-band response of the proposed MA provides near-perfect absorption (absorbance of 99.23%) at 0.6 THz. In addition, numerical simulations show that the suggested MA could achieve very high absorption over a wide range of angles of incidence at least for transverse magnetic (TM) waves. As a result, the suggested model can be used for numerou...
Effects of array guided surface waves on radiation characteristics of a finite planar printed dipole array
Aydın Çivi, Hatice Özlem; Pathak, PH (2004-06-26)
The presence of surface waves different from the conventional grounded dielectric substrate surface wave modes, which can be excited on a finite periodic radiating array of printed dipoles, at frequencies for which the spacing between dipoles is typically less than half a wavelength is studied. The effects of such array guided surface waves on the array radiation characteristics are investigated. Techniques to suppress these surface waves are also discussed.
Citation Formats
E. Ekmekci, K. Topalli, T. Akın, and G. Sayan, “Effects of Array Dimensions on the Resonance Characteristics of SRR Type Metamaterial Arrays with Small Sizes: Simulations and Experiments,” presented at the Progress in Electromagnetics Research Symposium (PIERS 2009 Moscow), Moscow, Russia, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54804.