Wideband Small Fractal Antenna with Simple Design Strategy for 5G Sub-6-GHz Wireless Communications

This work offers the design of a fractal geometry based wideband antenna for sub-6-GHz applications. Rogers TMM 4 thermoset microwave material was chosen to design a compact size antenna having an overall dimension of 30 mm × 30 mm × 1.524 mm. The radiator of the presented antenna was extracted from the conventional square patch, afterward fractals were loaded to enhance the bandwidth of the antenna. The antenna covers a measured wide bandwidth of 2.8 GHz ranging 2.97 – 5.77 GHz that is corresponded to 64% practical bandwidth covering complete 5G sub-6-GHz band spectrum allocated globally. Across this band it shows peak gain and radiation efficiency of> 4 dBi and> 90%. Beside this, the presented work offers a low complexity level of the structure and omni-directional radiation pattern. A sample prototype was fabricated and tested to verify various performance parameters of the proposed antenna along with a comparison of proposed work with state-of-the-art-works for similar band, to demonstrate the potential of the presented work.