High Bandwidth Microstrip Antenna Using Electromagnetic Band Gap Structures for Cellular System and Satellite Communication

Recently Electromagnetic Band Gap (EBG) structures are catching more attentions due to its attractive features of giving higher bandwidth and suppressing the surface wave, leaky wave and switching noise. In this paper a spoon type microstrip patch is proposed with slots and EBG structures. The antenna with spoon type patch and two slots without EBG gives the bandwidth of 8.64 GHz (2.22-10.86 GHz), whereas with EBG and two slots gives the bandwidth of 15.71 GHz (2.27 -- 17.98 GHz). The achieved largest impedance bandwidth is 155.16% considering VSWR 2:1. The proposed antenna will serve various applications for Bluetooth, UWB cellular systems and satellite communication. With the higher bandwidth the antenna also gives lower mutual coupling than the antenna without EBG. Here FR4 substrate is used having relative permittivity 4.4.

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