TY - JOUR
T1 - Decoupling Network Integrated With CSRR-Based Filtering Power Dividers for Antenna Arrays
AU - Zhang, Yiming
AU - Li, Xu
AU - Zhang, Shuai
AU - Xiao, Shaoqiu
PY - 2023/12/1
Y1 - 2023/12/1
N2 - This brief provides a mutual coupling suppression network for antenna arrays with high frequency selectivity. The proposed network is composed of three-order (denoting three decoupling bridges established by transmission lines) decoupling networks and unequal power dividers consisting of complementary split-ring resonators featuring bandpass and harmonic suppression responses. All the decoupling structures are highly integrated. A design example of a 2×4 patch antenna array, working at 4.9 GHz and integrated with the proposed decoupling network, is constructed and fabricated. Simulated and measured results indicate that the antenna array is well-decoupled involving the suppression of vertical, horizontal, and diagonal coupling paths. The measured common bandwidth of impedance matching (|Sii| < ‒10 dB) and isolation (> 25 dB) is from 4.8 to 5.1 GHz. A small insertion loss of 0.35 dB is introduced. Moreover, a filtering response is observed, and gain nulls are generated at the two sides of the operating band. As for the demonstrator, spurious up to 11 GHz is well suppressed and the peak gain at the harmonic band is reduced by over 20 dB, exhibiting a good harmonic suppression performance.
AB - This brief provides a mutual coupling suppression network for antenna arrays with high frequency selectivity. The proposed network is composed of three-order (denoting three decoupling bridges established by transmission lines) decoupling networks and unequal power dividers consisting of complementary split-ring resonators featuring bandpass and harmonic suppression responses. All the decoupling structures are highly integrated. A design example of a 2×4 patch antenna array, working at 4.9 GHz and integrated with the proposed decoupling network, is constructed and fabricated. Simulated and measured results indicate that the antenna array is well-decoupled involving the suppression of vertical, horizontal, and diagonal coupling paths. The measured common bandwidth of impedance matching (|Sii| < ‒10 dB) and isolation (> 25 dB) is from 4.8 to 5.1 GHz. A small insertion loss of 0.35 dB is introduced. Moreover, a filtering response is observed, and gain nulls are generated at the two sides of the operating band. As for the demonstrator, spurious up to 11 GHz is well suppressed and the peak gain at the harmonic band is reduced by over 20 dB, exhibiting a good harmonic suppression performance.
KW - Antenna arrays
KW - Bridge circuits
KW - Couplings
KW - Filtering
KW - Harmonics suppression
KW - Multiple input multiple output antennas
KW - Mutual coupling
KW - Power dividers
KW - antenna decoupling
KW - bandpass
KW - harmonic suppression
KW - large-scale array
UR - http://www.scopus.com/inward/record.url?scp=85164801904&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2023.3294907
DO - 10.1109/TCSII.2023.3294907
M3 - Journal article
SN - 1549-7747
VL - 70
SP - 4334
EP - 4338
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
IS - 12
ER -