TY - JOUR
T1 - A Wideband Low-Profile Tightly Coupled Antenna Array with a Very High Figure of Merit
AU - Bah, Alpha O.
AU - Qin, Pei Yuan
AU - Ziolkowski, Richard W.
AU - Guo, Y. Jay
AU - Bird, Trevor S.
N1 - Funding Information:
This work was supported in part by the Australian Government Research Training Program Scholarship, in part by the Cooperate Research Centre for Space Environment Management (SERC Limited), and in part by the Australia Research Council Discovery Program under Grant DE170101203 and Grant DP160102219.
Funding Information:
Manuscript received September 4, 2018; revised November 27, 2018; accepted December 13, 2018. Date of publication January 8, 2019; date of current version April 5, 2019. This work was supported in part by the Australian Government Research Training Program Scholarship, in part by the Cooperate Research Centre for Space Environment Management (SERC Limited), and in part by the Australia Research Council Discovery Program under Grant DE170101203 and Grant DP160102219. (Corresponding author: Pei-Yuan Qin.) The authors are with the Global Big Data Technologies Centre, University of Technology Sydney, Ultimo, NSW 2007, Australia (e-mail: alpha.bah@ student.uts.edu.au; [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 1963-2012 IEEE.
PY - 2019/4
Y1 - 2019/4
N2 - A wideband, low-profile, tightly coupled antenna array with a simple feed network is presented. The dipole and feed networks in each unit cell are printed on both sides of a single RT/Duroid 6010 substrate with a relative dielectric constant of 10.2. The feed network, composed of meandered impedance transformer and balun sections, is designed based on Klopfenstein tapered microstrip lines. The wide-angle impedance matching is empowered by a novel wideband metasurface superstrate. For the optimum design, scanning to 70° along the E-plane is obtained together with a very high array figure of merit P A = 2.84. The H-plane scan extends to 55°. The broadside impedance bandwidth is 5.5:1 (0.80-4.38) GHz with an active voltage standing-wave ratio value ≤2. The overall height of the array above the ground plane is 0.088λ L, where λ L is the wavelength at the lowest frequency of operation. A prototype was fabricated and tested to confirm the design concepts.
AB - A wideband, low-profile, tightly coupled antenna array with a simple feed network is presented. The dipole and feed networks in each unit cell are printed on both sides of a single RT/Duroid 6010 substrate with a relative dielectric constant of 10.2. The feed network, composed of meandered impedance transformer and balun sections, is designed based on Klopfenstein tapered microstrip lines. The wide-angle impedance matching is empowered by a novel wideband metasurface superstrate. For the optimum design, scanning to 70° along the E-plane is obtained together with a very high array figure of merit P A = 2.84. The H-plane scan extends to 55°. The broadside impedance bandwidth is 5.5:1 (0.80-4.38) GHz with an active voltage standing-wave ratio value ≤2. The overall height of the array above the ground plane is 0.088λ L, where λ L is the wavelength at the lowest frequency of operation. A prototype was fabricated and tested to confirm the design concepts.
KW - Bandwidth
KW - figure of merit
KW - metasurface (MS)
KW - phased arrays
KW - tightly coupled (TC) arrays
KW - ultrawideband arrays
KW - wide-angle impedance matching (WAIM)
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U2 - 10.1109/TAP.2019.2891460
DO - 10.1109/TAP.2019.2891460
M3 - Article
AN - SCOPUS:85059823482
SN - 0018-926X
VL - 67
SP - 2332
EP - 2343
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 4
M1 - 8605378
ER -