Super wideband with band rejection characteristics circular patch monopole antenna for 5G and beyond

Abstract

Abstract A super wideband monopole antenna design for microwave and advanced wireless applications in the frequency range of 2.2 GHz to 27.06 GHz. At first, a circular resonator with a ring dimension is used to achieve a wideband range of frequency with a band rejection characteristic in the lower band. Where the antenna provides broadband from 2.2 GHz to 27.06 GHz with four notch bands covering 12.26–14.44 GHz, 17.39–19.60 GHz, 2.69–4.36 GHz, and 5.5–7.14 GHz. These notch band frequencies are productively used to evacuate undesired interference of different wireless frequencies. Additionally, six symmetrical tiny circle stubs are introduced in the ground plane to improve the overall characteristic without notch bands. The combination of the ring patch with the line feed broadens the stable radiation, super bandwidth, and stable gain characteristics. The overall electric size of the antenna is 0.41 × 0.35 × 1.52 λ 0 3 where the maximum gain is 6.4 dBi in between the higher frequency band and 4 dBi from 2.6–5.7 GHz. The proposed antenna exhibits a novel structure and achieves a wide bandwidth without using any external electronics components. The overall fractional bandwidth is more than 166% and excellent performance enters the wireless frequency band. The proposed structure was designed and fabricated to be experimentally validated and could be applied in various wireless components and applications.