Affiliations: [a] Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia | [b] Department of Electrical, Electronic and System Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia | [c] School of Electrical Engineering and Computer Science, Queensland University of Technology, Brisbane, QLD, Australia
Correspondence:
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Corresponding author: M. Habib Ullah, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia. Tel.: +60 122586824; E-mail:[email protected]
Abstract: The design and prototyping of a dual port planar printed
quad band/Ultra wide band (UWB) patch antenna, with octagonal ring shaped
metasurface structure (MSS) assimilated at the back to reduce mutual
coupling between antenna elements, is presented. The proposed MSS
incorporated UWB antenna has been designed and fabricated on a high
permittivity (εr= 15) ceramic filled biopolymer based sandwich
structured dielectric substrate. Substantial reductions of mutual coupling
(S21) between the dual port array elements of the proposed antenna has been
achieved by assimilating a 6 × 9 octagonal ring shaped metasurface
structure with near zero refractive index (NZRI) in the ground plane.
Measurement results show that the proposed antenna with MSS loading has
achieved the reflection co-efficient (S11 <-10 dB) bandwidths of 1.25
(2.25-3.5) GHz, 1 (4-5) GHz, 0.7 (5.9-6.6) GHz and 1.75 (7.7-9.45) GHz.
Stable radiation patterns, with gains of 3.18 dBi, 2.96 dBi, 3.34 dBi and
9.61 dBi, have been measured at resonant frequencies of 2.85 GHz, 4.4 GHz,
6.2 GHz and 8.75 GHz.
Keywords: Mutual coupling reduction, octagonal ring metasurface structure, near zero refractive index, dual port antenna, ultra wideband
