Abstract
This communication explores the super-wideband Koch snowflake fractal monopole slot antenna for different wireless/multiband applications. The antenna comprises of a modified star-shaped patch, a 50 Ω triangular tapered feedline, a partial slot loaded ground plane and an I-shaped parasitic element located beneath the radiating element. The self-similarity and space-filling features of Koch iteration technique have been employed at the triangular patch to acquire the antenna compactness and broadband performances. Further by placing a pair of symmetrical L-shaped slots and an inverted U-shaped slot in the ground plane, a super-wide-impedance bandwidth (BW) ( ) of 650 MHz–20 GHz with a ratio BW of 30.7:7 is attained. The proposed antenna has a compact size of 17 × 29 × 0.787 mm 3 and has a stable radiation pattern over the entire frequency spectrum. For pattern stability, an I-shaped parasitic element was utilised. Moreover, the typical antenna parameters such as return loss, gain, radiation pattern and group delay have been simulated and verified experimentally. Time-domain characteristics have also been studied.
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