A Highly Efficient Microstrip Patch Antenna for 6G Applications with High Gain and Ultrawide Bandwidth

This work primarily focuses on design/developing a compact microstrip patch antennas for 6G applications with better performance. In this paper, by using CST - Computer Simulation Technology AG (CST) software we have designed and analyzed a smaller size, wider bandwidth, superb gain, better return loss and highly efficient microstrip patch antenna with a rectangular shape operating at a frequency of $123 \mathbf{~ G H z}$ in the frequency range of $\mathbf{6G}$ applications. In the range of 50 ohm microstrip transmission line or fed line is used to developed antenna in order to achieve the expected design, we have used Rogers RT/Duroid 5880 as a substrate, characterized by a specific dielectric constant $\left(\varepsilon_{r}\right)=2.2$ with substrate thickness = 0.508 mm. Upon evaluating the design, we have determined that this design approach is highly efficient and dependable for 6G applications at 123 GHz of resonant frequency having excellent return loss of -51.32 dB, superb antenna radiation efficiency of $\mathbf{8 8. 5 3 \%}$, ultrawide-bandwidth of 6.4 GHz and excellent gain of 11.61 dBi.