用于紧凑型宽带MIMO微带天线的解耦技术OA

To address the issue of narrow bandwidth in existing Multiple-Input Multiple-Output(MIMO)microstrip antennas,a compact broadband high-isolation MIMO microstrip antenna and array design is proposed.By introducing cross-type capacitive fences,open slots,and shorting vias,the isolation between ports is gradually enhanced.To validate this concept,a 1×2 microstrip antenna and a 2×2 array were fabricated and measured.The measured impedance bandwidth of the 2×2 array is 44.9%,with an isolation better than 21.8 dB,showing good consistency between the measured and simulated results.Based on the 2×2 array,the applicability of the proposed decoupling structure in large-scale arrays was further verified.Simulation results indicate that the impedance bandwidth of a 2×6 array is 43.5%,with an isolation of at least 20 dB within the operating bandwidth.Therefore,the proposed decoupling solution has broad application prospects in broadband high-isolation MIMO applications and antenna arrays.