A Miniature Microstrip Antenna Array using Circular Shaped Dumbbell for ISM Band Applications

Ahmed Ghaloua (LMEET Laboratory FST of Settat Hassan 1st University)
Jamal Zbitou (LMEET Laboratory FST of Settat Hassan 1st University)
Larbi El Abdellaoui (LMEET Laboratory FST of Settat Hassan 1st University)
Mohamed Latrach (Microwave group ESEO Angers France)
Ahmed Errkik (LMEET Laboratory FST of Settat Hassan 1st University)
Abdelali Tajmouati (LMEET Laboratory FST of Settat Hassan 1st University)

International Journal of Electrical and Computer Engineering
Vol 8, No 5: October 2018

The aim of this work is the achievement, and the validation of a small microstrip patch antenna array using a circular shaped dumbbell defected ground structure. This work has been dividing into two stages: The first step is to miniaturize a microstrip patch antenna resonating at 5.8GHz, which operate in the Industrial Scientific Medical band (ISM) and the second is to use a circular defected ground structure to shift the resonance frequency of the antenna array from 5.8GHz to 2.45GHz. At last, a miniaturization up to 74.47%, relative to the original microstrip antenna array has accomplished. The antenna structure has designed, optimized and miniaturized using CST MW Studio. The obtained results have compared with Ansoft’s HFSS electromagnetic solver. The antenna array has fabricated on FR-4 substrate, and its reflection coefficient is measured.