Abstract
A compact high isolation MIMO antenna is designed for 5GNR n78 band operation in mobile terminals, which consists of 8 compact monopole antenna elements. High isolation based on neutralization line decoupling technique is achieved, the working mechanism of antenna decoupling is discussed in detail in the paper. The proposed MIMO antenna is simulated by electromagnetic simulation software HFSS, the geometry size of the proposed MIMO antenna is 75×107×0.8 mm3 , etched on FR4 dielectric substrate with thickness of 0.8mm, the size of the antenna structure is in accordance with the smartphone size, the operating band covers 3.4GHz-3.6GHz of n78, and the isolation is more than 13dB at the 3.4GHz-3.6GHz band by neutralization line decoupling technique. The designed MIMO antenna has good isolation and diversity characteristics and can be used in MIMO system of 5G mobile terminal.
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