New Miniature Planar Microstrip Antenna Using DGS for ISM Applications
Abstract: The aim of this
paper is to use defected ground structures (DGS) in order to miniaturize a microstrip
patch antenna. The DGS structure is integrated in the ground plane to improve
the performance of the planar antenna, and shifted the resonance frequency from
5.8 GHz to 2.5 GHz, with a miniaturization up to 83%.The antenna is designed,
optimized, and miniaturized by using the CST MWstudio, mounted on an FR-4
substrate having a dielectric constant 4.4, a loss tangent tan (ΙΈ) = 0.025,thickness
of 1.6 mm with the whole area of 34 X 34 mm2.The proposed antenna is suitable
for ISM (Industrial, Scientific and Medical) applications at 2.5 GHz with S11 ≤
(-10) dB. The antenna is fed by 50ohm input impedance and it has good
performances in terms of matching input impedance and radiation pattern. The
proposed antenna was fabricated and tested.Simulation and measurement results
are in good agreement.
Author: R. Er-rebyiy
Journal Code: jptkomputergg170043
