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- W2023483644 abstract "The characteristics of an Archimedean spiral (ARSP) antenna backed by an extremely shallow cavity (0.07 wavelength at the lower operating design frequency of 3 GHz) are analysed. It is revealed that the presence of the cavity causes noticeable variation in the antenna characteristics at low frequencies. To restore the wideband characteristics inherent to the ARSP, a ring-shaped strip absorber (R-ABS) is placed under the spiral arms. It is found that the wideband antenna characteristics are successfully restored with the use of the R-ABS. Subsequently, the R-ABS is divided into two arc-shaped strip absorbers and the volume of each is reduced by decreasing the arc-angle phisARC from 180° (corresponding to an R-ABS) to 0° (corresponding to a cavity without an absorber). It is shown that when the arc-angle is chosen to be greater than phisARC=90°, the antenna characteristics obtained for phisARC=180° are reproduced. Theoretical results are confirmed using results from experimental work." @default.
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- W2023483644 date "2008-10-01" @default.
- W2023483644 modified "2023-09-23" @default.
- W2023483644 title "Cavity-backed Archimedean spiral antenna with strip absorber" @default.
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- W2023483644 doi "https://doi.org/10.1049/iet-map:20080022" @default.
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