TY - JOUR
T1 - Miniaturized, Low-Profile, Triple-Band Microstrip Antenna and its Four-Antenna Module for Smartphone Applications
AU - Wan, Zhengyuan
AU - He, Yijing
AU - Bai, Yuming
AU - Sun, Houjun
N1 - Publisher Copyright:
© 1963-2012 IEEE.
PY - 2023/12/1
Y1 - 2023/12/1
N2 - A miniaturized, low-profile, triple-band, and four-port multi-input multi-output (MIMO) microstrip antenna module (MAM) is proposed for smartphones. First, a planar integrated L-shaped capacitively coupled feeding probe, a stepped slot, and a grounding via are sequentially exploited. As a result, TM0,1, TM1,1, and quasi-TM2,0 modes are independently manipulated to make a microstrip antenna (MA) operate in the 2.4-GHz WLAN, fifth-generation (5G) N78, and N79 bands, respectively. Both good impedance matching and radiation properties are realized with a small volume of 28.4× 28.4× 1 mm3. Then, a triple-band four-port MIMO MAM is constructed by sequentially rotating the proposed antenna element. As a validation of the concept, the proposed integrated four-port antenna module with an electrical volume of only 0.48λ L × 0.48λ L × 0.008λ L is fabricated and experimentally tested, presenting a good consistency between the measurements and simulations. Without adding any extra decoupling structures between antenna elements, port isolations are better than 15.9 dB and envelope correlation coefficients (ECCs) are lower than 0.07, respectively. Compared with the existing triple-band four-MAMs, the proposed one is with the advantages of small volume, easy integration, and high isolation for 5G smartphone and terminal applications.
AB - A miniaturized, low-profile, triple-band, and four-port multi-input multi-output (MIMO) microstrip antenna module (MAM) is proposed for smartphones. First, a planar integrated L-shaped capacitively coupled feeding probe, a stepped slot, and a grounding via are sequentially exploited. As a result, TM0,1, TM1,1, and quasi-TM2,0 modes are independently manipulated to make a microstrip antenna (MA) operate in the 2.4-GHz WLAN, fifth-generation (5G) N78, and N79 bands, respectively. Both good impedance matching and radiation properties are realized with a small volume of 28.4× 28.4× 1 mm3. Then, a triple-band four-port MIMO MAM is constructed by sequentially rotating the proposed antenna element. As a validation of the concept, the proposed integrated four-port antenna module with an electrical volume of only 0.48λ L × 0.48λ L × 0.008λ L is fabricated and experimentally tested, presenting a good consistency between the measurements and simulations. Without adding any extra decoupling structures between antenna elements, port isolations are better than 15.9 dB and envelope correlation coefficients (ECCs) are lower than 0.07, respectively. Compared with the existing triple-band four-MAMs, the proposed one is with the advantages of small volume, easy integration, and high isolation for 5G smartphone and terminal applications.
KW - Multi-input multi-output (MIMO)
KW - triple-band four-port microstrip antenna (MA)
KW - wireless communication
UR - http://www.scopus.com/inward/record.url?scp=85172995821&partnerID=8YFLogxK
U2 - 10.1109/TAP.2023.3315471
DO - 10.1109/TAP.2023.3315471
M3 - Article
AN - SCOPUS:85172995821
SN - 0018-926X
VL - 71
SP - 9950
EP - 9955
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 12
ER -