TY - JOUR
T1 - Massive MIMO Array Design with High Isolation by Using Decoupling Cavity
AU - Luo, Shengyuan
AU - Pedersen, Gert Frølund
AU - Zhang, Shuai
PY - 2023
Y1 - 2023
N2 - This letter proposes an isolation enhancement method for massive multiple-input multiple-output arrays using decoupling cavities (DC). The proposed DC is made of a pure Polypropylene (PP) board, and an air cavity is engraved on it. The DC has high transmission in the normal direction and a high insertion loss in the tangential direction of the arrays, respectively. The DC operates with a broadband response due to the low dielectric constant of the substrate. An example of a 4×4 array with an inter-element distance around half wavelength is designed to verify the proposed isolation enhancement method. The triple-layers stacked DC are employed seamlessly above the array. The isolation of the array was enhanced to 24 dB within the bandwidth of 4.21-4.79 GHz. At the same time, the radiation characteristics of the arrays before and after loading the DC basically keep consistent.
AB - This letter proposes an isolation enhancement method for massive multiple-input multiple-output arrays using decoupling cavities (DC). The proposed DC is made of a pure Polypropylene (PP) board, and an air cavity is engraved on it. The DC has high transmission in the normal direction and a high insertion loss in the tangential direction of the arrays, respectively. The DC operates with a broadband response due to the low dielectric constant of the substrate. An example of a 4×4 array with an inter-element distance around half wavelength is designed to verify the proposed isolation enhancement method. The triple-layers stacked DC are employed seamlessly above the array. The isolation of the array was enhanced to 24 dB within the bandwidth of 4.21-4.79 GHz. At the same time, the radiation characteristics of the arrays before and after loading the DC basically keep consistent.
KW - Couplings
KW - Decoupling cavity (DC)
KW - Insertion loss
KW - Massive MIMO
KW - Microstrip antenna arrays
KW - Microstrip antennas
KW - Mutual couplings
KW - Scattering parameters
KW - isolation enhancement
KW - massive multiple-input multiple-output (MIMO) antenna arrays
UR - http://www.scopus.com/inward/record.url?scp=85140736150&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2022.3216394
DO - 10.1109/TCSII.2022.3216394
M3 - Journal article
VL - 70
SP - 1
JO - I E E E Transactions on Circuits and Systems. Part 2: Express Briefs
JF - I E E E Transactions on Circuits and Systems. Part 2: Express Briefs
SN - 1549-7747
IS - 3
ER -