Abstract
This paper presents equivalent circuit modeling of an ultra-thin polarization-independent metamaterial microwave absorber consisting of three concentric closed ring resonators (CRR). The unit cell size as well as the other geometrical dimensions like radii and widths of the rings are optimized so that absorptions take place at three distinct frequencies near to the middle of the FCC defined radar spectrum eg., at 5.50 GHz, 9.52 GHz and 13.80 GHz with peak absorptivities of 94.1%, 99.6% and 99.4% respectively. The equivalent circuit model of the triple band absorber has been developed sequentially considering the single band and double band absorber models. The circuit simulation of the final model agrees well with the full-wave simulation, thus validating the modeling technique. The structure is also fabricated and experimental absorption peaks are found close to the simulated values.
Highlights
Over the last few years, researches on metamaterials[1] are very popular
This paper presents equivalent circuit modeling of an ultra-thin polarizationindependent metamaterial microwave absorber consisting of three concentric closed ring resonators (CRR)
Circulating current loops are created within the structure which is supported by the incident magnetic field, resulting in magnetic excitation
Summary
Over the last few years, researches on metamaterials[1] are very popular. Closed ring resonator (CRR) based structures[11,12] have been used as absorbers as they are geometrically symmetric in nature giving rise to polarization-independent response. Several types of metamaterial absorbers have been proposed in recent years.[13,14,15,16,17,18] Till date, various designs for choice of geometrical parameters for a perfect metamaterial absorber have been investigated.[18,19] most of them are limited to the discussion on single band absorber.[20,21]. The peak absorptivities of 98.0%, 99.9% and 99.9% are measured at frequencies 5.51 GHz, 9.45 GHz and 13.79 GHz respectively
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
