Abstract
Dual-Band Compact Metamaterial-Inspired Absorber with Wide Incidence Angle and Polarization Insensitivity for GSM and ISM Band Applications
Highlights
Metamaterials (MTMs) are artificial materials whose electric and magnetic responses can be altered according to the required application to exhibit exotic properties not usually available in nature [1], [2]
Among several MTM based RF component applications like antennas [3,4,5], filters [6], [7] and high frequency photodiode bias Tee circuits [8], metamaterial absorbers (MMA) [9] are extensively proposed and investigated due to the various properties exhibited in the form of multi-band [10], polarization independence [11], compact [12], broad-band [13], [14], and wide-oblique angle [15], [16]
To the extent of author's knowledge, no microwave MMA has been reported so far for the aforementioned frequency band and the proposed absorber is tested for the polarization insensitivity using waveguide measurement technique [13,14,15]
Summary
Metamaterials (MTMs) are artificial materials whose electric and magnetic responses can be altered according to the required application to exhibit exotic properties not usually available in nature [1], [2]. Among several MTM based RF component applications like antennas [3,4,5], filters [6], [7] and high frequency photodiode bias Tee circuits [8], metamaterial absorbers (MMA) [9] are extensively proposed and investigated due to the various properties exhibited in the form of multi-band [10], polarization independence [11], compact [12], broad-band [13], [14], and wide-oblique angle [15], [16] These exotic characteristics of MMAs are achieved merely by altering the geometrical parameters of the sub-wavelength unit cells which are usually arranged in a periodic manner. Polarization angle and oblique angle variations for both TE (transverse electric) and TM (transverse magnetic) modes are illustrated to show that the proposed absorber is polarization insensitive with fairly high absorption of 82% and 98%, respectively, for wide oblique incidence angle of about
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