Polarization-insensitive FSS-based perfect metamaterial absorbers for GHz and THz frequencies

Sabah, Cumali
Dincer, Furkan
Akgol, Oguzhan
New perfect frequency selective surface (FSS) metamaterial absorbers (MAs) based on resonator with dielectric configuration are numerically presented and investigated for both microwave and terahertz frequency ranges. Also, to verify the behaviors of the FSS MAs, one of the MAs is experimentally analyzed and tested in the microwave frequency range. Suggested FSS MAs have simple configuration which introduces flexibility to adjust their FSS metamaterial properties and to rescale the structure easily for any desired frequency range. There is no study which simultaneously includes microwave and terahertz absorbers in a single design in the literature. Besides, numerical simulations verify that the FSS MAs could achieve very high absorption levels at wide angles of incidence for both transverse electric and transverse magnetic waves. The proposed FSS MAs and their variations enable many potential application areas in radar systems, communication, stealth technologies, and so on.


Sectorized approach and measurement reduction for mutual coupling calibration of non-omnidirectional antenna arrays
Aksoy, Taylan; Tuncer, Temel Engin (American Geophysical Union (AGU), 2013-03-01)
Mutual coupling calibration is an important problem for antenna arrays. There are different methods proposed for omnidirectional antennas in the literature. However, many practical antennas have non-omnidirectional (NOD) characteristics. Hence, the previous mutual coupling calibration methods cannot be applied directly since the mutual coupling matrix of an NOD antenna array has angular dependency. In this paper, a sectorized approach is proposed with a transformation matrix for mutual coupling calibration ...
Polarization Angle Independent Perfect Metamaterial Absorbers for Solar Cell Applications in the Microwave, Infrared, and Visible Regime
Dincer, Furkan; Akgol, Oguzhan; KARAASLAN, MUHARREM; ÜNAL, EMİN; Sabah, Cumali (EMW Publishing, 2014-01-01)
We design, characterize, and analyze a new kind of metamaterial (MTM) absorber (MA) in different frequency regions for the solar cell applications. This MTM based structure is particularly presented in a range of the solar spectrum in order to utilize the solar energy effectively. The proposed MTM based solar cell provides perfect absorption for both infrared and visible frequency ranges and can be used for the realization of more efficient new solar cells. The structure is also tested in terms of the polar...
Polarization and angle independent perfect metamaterial absorber based on discontinuous cross-wire-strips
Dincer, Furkan; KARAASLAN, MUHARREM; ÜNAL, EMİN; Akgol, Oguzhan; Demirel, Ekrem; Sabah, Cumali (Informa UK Limited, 2014-04-13)
This study presents design, fabrication, and measurement of a metamaterial absorber (MA) based on discontinuous cross-wire-strip (CWS) resonators. This suggested that MA has a simple geometry configuration and introduces perfect absorption approximately 99.79% at 3.42 GHz for simulation and 99.72% at 3.44 GHz for experiment. In addition, the designed model can be used to realize the broadband absorber for desired frequency ranges. Besides, numerical simulations validate that the MA could achieve very high a...
Modeling and synthesis of circular-sectoral arrays of log-periodic antennas using multilevel fast multipole algorithm and genetic algorithms
Ergül, Özgür Salih (American Geophysical Union (AGU), 2007-06-19)
Circular-sectoral arrays of log-periodic (LP) antennas are presented for frequency-independent operation and beam-steering capability. Specifically, nonplanar trapezoidal tooth LP antennas are considered in a circular array configuration, where closely spaced antennas occupy a sector of the circle. Electromagnetic interactions of the array elements, each of which is a complicated LP antenna structure, are rigorously computed with the multilevel fast multipole algorithm (MLFMA). Genetic algorithms (GAs) are ...
Nonplanar trapezoidal tooth log-periodic antennas: Design and electromagnetic modeling
Ergül, Özgür Salih (American Geophysical Union (AGU), 2005-10-18)
Nonplanar trapezoidal tooth log-periodic (LP) antennas are investigated by combining the wisdom of theoretical design procedures with the power of accurate numerical simulation environments. Once the theoretical design is completed, electromagnetic simulations employing accurate integral equation solvers are utilized to test and correct the original design. A two-element array of trapezoidal tooth LP antennas is designed. The array features beam-steering ability as a novelty, in addition to frequency indepe...
Citation Formats
C. Sabah, F. Dincer, M. KARAASLAN, E. ÜNAL, and O. Akgol, “Polarization-insensitive FSS-based perfect metamaterial absorbers for GHz and THz frequencies,” RADIO SCIENCE, pp. 306–314, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67945.