Characterization of Slotted Square Rings AMC Reflector Using Printed Dipole Antenna

Abstract

The reflector has a role in enhancing the return loss of antenna becoming a selective frequency. In this paper, an artificial magnetic conductor (AMC) based reflector composed of slotted square rings is proposed and characterized using a printed dipole antenna. The used of AMC layer which has high surface impedance is expected to reduce the distance between the antenna and the reflector yielding a compact device. The configuration of AMC reflector and printed dipole antenna is designed each on an RO3003 dielectric substrate with the relative permittivity of 3.0 and the thickness of 0.5 mm. The configuration is intended to be used for wireless communication at the Industrial, Scientific, and Medical (ISM) band frequency of 2.4 GHz. The proposed reflector is constructed by a 3×3 unit cell of AMC structure where each unit cell is composed of slotted square rings configured concentrically. Meanwhile, the characterization is carried out by varying the parameters of AMC reflector and printed dipole antenna. The result shows the configuration with the distance between the antenna and the reflector of λ/23, or around 5 mm, could produce a significant value of reflection coefficient (S11) among others. This configuration could achieve the S11 value up to –24 dB at the frequency of 1.98 GHz.