Abstract
A microstrip line-fed octagonal Sierpinski super-wideband antenna is presented. It comprises a microstrip line-fed second-iterative fractal radiating patch and symmetric miniaturized defected ground plane. It has an operating bandwidth of 3.68–31.61 GHz with band rejection function for the frequency range of 7.86–11.08 GHz. The difference between the co-polar and cross-polar patterns is observed to decrease from 20 to 0 dB with increase in frequency. Omni- and bidirectional patterns are observed at lower frequencies, and distorted patterns at higher frequencies. The experimental and simulated results are observed to be in good agreement with each other. The designed antenna is superior to other SWB antenna structures in terms of its wide bandwidth, miniaturized dimensions, and band-notched characteristic.
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