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- W4295935067 abstract "This letter investigates a novel technique to achieve circular polarizations (CPs) at 2.45 GHz ISM and 3.5 GHz WiMAX bands. The behavior is achieved by incidenting an <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$x$</tex-math></inline-formula> -polarized wave from a monopole antenna (MA) on a polarization-converting metasurface (PCMS). The PCMS operates in TM <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{10}$</tex-math></inline-formula> and TM <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{20}$</tex-math></inline-formula> modes that generate dual frequency bands and reflect a 90° phase-shifted y-polarized wave that, when combined with the 0° phase containing <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$x$</tex-math></inline-formula> -polarized wave, generates CP. To attain four separate combinations of phase-shift in terms of +90° and −90° in dual bands, four distinct 2×2 PCMSs are designed, which are designated as MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{1}$</tex-math></inline-formula> , MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{2}$</tex-math></inline-formula> , MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{3}$</tex-math></inline-formula> , and MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{4}$</tex-math></inline-formula> . The MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{1}$</tex-math></inline-formula> -based MA (A <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{1}$</tex-math></inline-formula> ) produces left-hand CP (LHCP), whereas the MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{2}$</tex-math></inline-formula> -based MA (A <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{2}$</tex-math></inline-formula> ) produces right-hand CP (RHCP) in both frequency bands. On the other hand, the MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{3}$</tex-math></inline-formula> -based MA (A <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{3}$</tex-math></inline-formula> ) produces RHCP in the lower band (LB) and LHCP in the higher band (HB), whereas the MS <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{4}$</tex-math></inline-formula> -based MA (A <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{4}$</tex-math></inline-formula> ) produces LHCP in the LB and RHCP in the HB. A <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink><tex-math notation=LaTeX>$_{3}$</tex-math></inline-formula> is fabricated and measured, and the results are very close to the simulations. Each antenna has a wide impedance bandwidth, a high gain, and high efficiency with a low specific absorption rate (SAR) in the desired bands, which justifies their suitability for off-body communication." @default.
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- W4295935067 date "2023-01-01" @default.
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- W4295935067 title "Polarization-Converting Metasurface Inspired Dual-Band Dual-Circularly Polarized Monopole Antennas for Off-Body Communications" @default.
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- W4295935067 doi "https://doi.org/10.1109/lawp.2022.3206913" @default.
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