A Miniaturized Multiband Coplanar Waveguide Fed Frequency Reconfigurable Antenna for 5G Sub 6GHz and UWB Applications

This paper presents the design of a miniaturized coplanar waveguide-fed frequency-reconfigurable antenna tailored for wireless and 5G Sub-6GHz applications. The antenna design integrates a T-shaped feedline, a rectangular patch, an L-shaped patch, and a modified partial ground plane with a symmetric coplanar waveguide feed, resulting in an impressive performance. The overall prototype dimensions are compact at $23 \times 23.5 \times 1.6$ mm$^{3}$. Frequency reconfiguration is achieved by employing PIN diodes to connect the L-shaped patch and T-shaped feedline. The proposed antenna exhibits Ultra-Wide Band (UWB) and Triple Band responses under different switching conditions, covering a frequency range from 3 GHz to 12 GHz to cover most of the wireless communication frequency range. Extensive simulations reveal outstanding performance metrics, including a simulated efficiency of 96% and a peak gain of 8.61 dB across a maximum bandwidth of 7.6 GHz, accompanied by bidirectional radiation pattern properties. With its compact and cost-effective design, the proposed antenna is a promising solution for enhancing connectivity and signal quality in 5G sub-6GHz and UWB applications.