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Reduction of Mutual Coupling and Gain Improvement Using Step Electromagnetic Band-Gap (EBG) Structure

Farzad Mohajeri & Zeinab Danesh

Propagating surface waves in array microstrip patch antennas causes some problems such as mutual coupling and scan blindness.Electromagnetic band-gap (EBG) structures are the form of periodic structures that in a certain frequency band suppress propagating surface waves. A new EBG structure terminated as step EBG structure is introduced in this paper.Primarily , the frequency band-gap of mushroom-like EBG is exhibited graphicly .Afterward its application between two microstrip patch antennas is explained. Then the step EBG structure is compared with traditional structure.A computer model is developed, applying HFSS software.The satisfactory results of the mentioned model also are shown as monograph