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- W3009758981 abstract "A novel miniaturized ultrawideband (UWB) half-mode Vivaldi (HM-Vivaldi) antenna based on mirror image theory is proposed in this letter. The antenna consists of half a modified radiating arm and two rows of metallized vias, which are equivalent as the perfect electric wall. According to the mirror image theory, the induced current on the electric wall can replace the mirror image current of the radiating arm at its symmetrical position, which will result in the HM-Vivaldi structure. The antenna size of 0.35λ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0L</sub> × 0.54λ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0L</sub> (λ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0L</sub> is the free-space wavelength at the lowest operating frequency) is reduced by 33% compared to the original antipodal Vivaldi antenna size. In addition, the continuous exponential curved edge on the ground is improved to retain the wideband impedance match characteristic. The operation theory and parametric analysis of this HM-Vivaldi antenna are presented with a prototype being measured. An UWB from 5.3 to 40 GHz with the reflection coefficient lower than -10 dB is experimentally achieved except that |S11| is slightly higher than -10 dB at several frequencies, and the maximum gain reaches 11 dBi." @default.
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- W3009758981 date "2020-04-01" @default.
- W3009758981 modified "2023-10-13" @default.
- W3009758981 title "Miniaturized Ultrawideband Half-Mode Vivaldi Antenna Based on Mirror Image Theory" @default.
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- W3009758981 doi "https://doi.org/10.1109/lawp.2020.2977503" @default.
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