A 2×2 multiband MIMO antenna in the shape of a Pentagonal Hut for X-band and K-band applications

Today’s wireless applications favour antenna designs that are small, reliable, and simple to combine with RF circuit components. One kind of antenna that meets the aforementioned criteria is the microstrip patch antenna. Patch antennas radiating EM waves have low gain and bandwidth, the two fundamental characteristics of an antenna. An antenna patch often has a gain spectrum of 1-4 dBi. Employing a thicker, lower-dielectric-value substrate is the simplest method of raising these parameters, although this necessarily results in surface wave generation. For use with UWB, pentagon-shaped patch antennas with circular slots on the radiating patch EM energy are suggested in this research. The analysis is done on three separate designed structures with line feed for multiband applications. For use in X-Band and K-Band applications, a Dual or band-notched, two-port, microstrip-fed MIMO antenna with a pentagon shape is developed. The bandwidth of the band-notched characteristic is 9.4 to 11.12 GHz, with its centre frequency at 10.36 GHz and 19.8 to 21.09 GHz with its centre frequency is 20.43 GHz. The suggested antenna allows for X-band and K-band operation between 2.0 and 25 GHz. It is constructed using an inexpensive Rogers RT Duroid substrate that is 0.254 mm thick for Microwave access. In order to boost gain and bandwidth while minimizing mutual coupling between adjoining elements, a circular slot design is utilized. When operated on the correct frequency, the recommended 2×2 MIMO antenna demonstrated excellent return loss properties, reduced mutual coupling, and a minimal envelope correlation coefficient.