Abstract
In this article, a compact and planar antenna is designed and investigated. The design is inspired by the hexagonal shape. The proposed design has a bandwidth of 11.22 GHz, from 3.16 GHz to 14.38 GHz. A suitably placed inverted-U slot in the patch generates a WLAN band notch. The overall size of the design is 20 &times; 26 mm<sup>2</sup> (0.21 &times; 0.27 &lambda;<sub>0</sub><sup>2</sup> in terms of its highest wavelength). It is suitable to achieve a radiation pattern that is almost omnidirectional and has a maximum gain of 4 dBi in the passband. Simulated data is verified with the measured data and found to be in good agreement. The proposed design is suitable for sub-6 GHz, band-notched ultra-wideband, V2X, and modern wireless high-data-rate communication applications. KEY WORDS: defected ground, hexagonal shape, planar design, ultra-wideband, WLAN band notch
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