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• W2951516816 abstract "For the first time, a pattern-diversity cylindrical dielectric resonator (DR) antenna (DRA) is designed using the fundamental HEM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>11δ</sub> and TM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>01δ</sub> modes of the HEM and TM mode families, respectively. It makes use of the fact that at the center of the DR, the E-field of the HEM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>11δ</sub> mode is weakest but that of the TM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>01δ</sub> mode is strongest. Therefore, increasing the dielectric constant around the central DR region can lower the resonant frequency of the TM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>01δ</sub> mode with no virtual effects on the HEM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>11δ</sub> mode. Using this approach, the frequencies of the HEM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>11δ</sub> and TM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>01δ</sub> modes can be made equal to obtain a pattern-diversity antenna. A cylindrical DRA centrally loaded by a dielectric with a higher dielectric constant is used to realize this idea. Its HEM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>11δ</sub> and TM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>01δ</sub> modes are excited by a rectangular cross slot and an axial coaxial probe, respectively. To demonstrate the idea, a two-port diversity antenna fabricated with two different transparent materials was designed for 2.4 GHz WLAN applications. It is found that the two ports of the pattern-diversity DRA have a measured overlapping impedance bandwidth of 23.4%, with an envelope correlation coefficient of lower than 0.007 and a mean-effective-gain ratio lower than 0.1 dB." @default.
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• W2951516816 date "2019-11-01" @default.
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• W2951516816 title "Pattern-Diversity Cylindrical Dielectric Resonator Antenna Using Fundamental Modes of Different Mode Families" @default.
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• W2951516816 doi "https://doi.org/10.1109/tap.2019.2922873" @default.
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