Abstract
This study proposes a simple artificial magneto-dielectric (MD) antenna with a split-ring resonator (SRR) loaded in an array configuration. This SRR element is used to realize the MD characteristic that is beneficial for antenna miniaturization. The simulation of material permittivity and permeability is conducted to ensure that the proposed SRR-array configuration has the expected MD characteristic. Configurations of SRR in arrays of 3×3, 5×5, 7×7, and 9 × 9 are realized to obtain its radiation characteristics when embedded in the antenna ground plane. A rectangular patch antenna is used in this study. Based on the simulation, the proposed antenna with an SRR array of 5×5 achieves excellent MD characteristics with high permittivity and permeability of 32.44 and 51.39, respectively. Furthermore, a microstrip antenna loaded with the SRR 5×5 arrays are fabricated on RT/duroid 5880 substrate. It has a dimension of 0.31λ0 × 0.26λ0. The simulation and measurement results of the proposed antenna show a fractional bandwidth of 4.79% and 5.2% at 1.5 GHz; and a maximum gain of 5.20 dB and 4.95 dB, respectively. Good agreement between the simulated and the measured results was achieved.
Highlights
The need for compact antennas in wireless communication systems has become a critical problem in recent times, with many researchers examining new and alternative materials for antenna miniaturization [1]
As magneto-dielectric (MD) material can strike an optimal balance between antenna size and performance, it is promising for miniaturization purposes [2]–[5]
Various methods have been introduced in order to realize MD characteristics with simple processes by generating magnetic properties in dielectric materials, one of which is by adding inductive elements
Summary
The need for compact antennas in wireless communication systems has become a critical problem in recent times, with many researchers examining new and alternative materials for antenna miniaturization [1]. Marco et al [10] develops a compact printed-dipole antenna using metamaterial loading as the inductive element to reduce the size to a minimum of 0.19λ0 × 0.04λ0 × 0.003λ0 at 1.15 GHz. The negative refractive index of the metamaterial provides great flexibility with respect to controlling the permittivity and permeability when achieving miniaturization.
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