TY - GEN
T1 - A Shared-Aperture Decoupling Network (SADN) for Dual-Band Differentially-Fed Antenna (DFA) Array
AU - Wang, Xichen
AU - Ding, Can
AU - Li, Shiyong
AU - Zhao, Guoqiang
AU - Sun, Houjun
N1 - Publisher Copyright:
© 2025 European Association on Antennas and Propagation.
PY - 2025
Y1 - 2025
N2 - This paper proposes a dual-band shared-aperture decoupling network (SADN) to suppress mutual coupling in a dual-band antenna array. The array consists of two high-band (HB) patches and two low-band (LB) patches, all fed differentially. The SADN addresses both in-band coupling between the two HB antennas and between the two LB antennas, as well as cross-band coupling between the LB and HB antennas. The SADN can adapt to multi-band DFA arrays with different frequency ratios. To validate the design principle, a dual-band DFA array operating at 18.5 GHz and 28 GHz with a frequency ratio of 1:1.51 was designed, fabricated, and tested. The fractional bandwidths of the two bands are 6.0% and 10.1%, respectively. Within both bands, the isolation between any ports exceeds 26 dB. Compared to the case without the SADN, significant isolation improvements ranging from 15 dB to 45 dB have been achieved.
AB - This paper proposes a dual-band shared-aperture decoupling network (SADN) to suppress mutual coupling in a dual-band antenna array. The array consists of two high-band (HB) patches and two low-band (LB) patches, all fed differentially. The SADN addresses both in-band coupling between the two HB antennas and between the two LB antennas, as well as cross-band coupling between the LB and HB antennas. The SADN can adapt to multi-band DFA arrays with different frequency ratios. To validate the design principle, a dual-band DFA array operating at 18.5 GHz and 28 GHz with a frequency ratio of 1:1.51 was designed, fabricated, and tested. The fractional bandwidths of the two bands are 6.0% and 10.1%, respectively. Within both bands, the isolation between any ports exceeds 26 dB. Compared to the case without the SADN, significant isolation improvements ranging from 15 dB to 45 dB have been achieved.
KW - antenna decoupling
KW - differentially-fed antenna (DFA)
KW - dual-band antenna array
KW - shared-aperture antenna
KW - shared-aperture decoupling network (SADN)
UR - http://www.scopus.com/inward/record.url?scp=105007506550&partnerID=8YFLogxK
U2 - 10.23919/EuCAP63536.2025.10999211
DO - 10.23919/EuCAP63536.2025.10999211
M3 - Conference contribution
AN - SCOPUS:105007506550
T3 - EuCAP 2025 - 19th European Conference on Antennas and Propagation
BT - EuCAP 2025 - 19th European Conference on Antennas and Propagation
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 19th European Conference on Antennas and Propagation, EuCAP 2025
Y2 - 30 March 2025 through 4 April 2025
ER -