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- W3135887310 abstract "In this article, an ultra-wideband and wide-angle insensitive absorber is proposed. The unit cell of the proposed structure consists of a tightly coupled dipole array (TCDA2) under another TCDA (TCDA1) that is twice the height of TCDA2 (TCDA-under-TCDA structure). TCDA1 of the unit cell acts as either a lossless (or lossy) antenna when the frequency is out of (or in) the operating frequency range of TCDA2. Reciprocity is applied to design TCDA1 as an absorber when the frequency is out of the operating frequency range of TCDA2 (lossless antenna region). On the other hand, the multisection impedance matching technique is applied for TCDA1 to be an absorber when the frequency is in the operating region of TCDA2 (lossy antenna region and reciprocity cannot be applied). In addition, a metasurface (MS) and vertical metal strip (VMS) are employed to develop the wide-angle insensitivity absorber. A -10 dB reflection bandwidth of 0.63-6.55 (10.4:1) is achieved with a 0.126λ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>low</sub> at the lowest operating frequency under normal incidence. The bandwidth is moderately reduced to 0.69-6.75 (9.78:1) with a 0.138λ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>low</sub> for the TE mode and 0.75-6.22 (8.29:1) with a 0.150λ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>low</sub> for the TM mode under 45° oblique incidence. The measured results of the fabricated absorber using the transverse electromagnetic (TEM) cell are in good agreement with the simulated results." @default.
- W3135887310 created "2021-03-15" @default.
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- W3135887310 date "2021-09-01" @default.
- W3135887310 modified "2023-10-16" @default.
- W3135887310 title "Ultra-Wideband and Wide-Angle Insensitive Absorber Based on TCDA-Under-Tightly Coupled Dipole Array" @default.
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- W3135887310 doi "https://doi.org/10.1109/tap.2021.3061008" @default.
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