Next-Generation Dual-Band MIMO Antenna with Slot Integration for 5G And Satellite Communication

Abstract

This work presents a novel spiral-shaped microstrip patch 2×2 MIMO antenna designed for 5G (n258 band) and satellite communication applications. The proposed antenna (A4) employs a dual-band parallel port arrangement, which effectively enhances isolation to better than 30 dB. It achieves an impedance bandwidth of 31.79% (19.82–27.31 GHz) and 14.23% (31.07–35.83 GHz), corresponding to resonant frequencies at 26.29 GHz and 32.64 GHz, respectively. The radiating element integrates a meandered-shaped slot between ports, significantly improving bandwidth, peak gain, and isolation. The compact antenna occupies a total size of 30 × 30 × 1.6 mm³, making it highly suitable for modern wireless systems. To evaluate diversity performance, key MIMO parameters such as Envelope Correlation Coefficient (ECC), Diversity Gain (DG), Total Active Reflection Coefficient (TARC), and Channel Capacity Loss (CCL) are analyzed. Both simulated and measured results validate the antenna’s superior performance and confirm its effectiveness for next-generation high-frequency communication systems.