Realizing UWB Antenna Array with Dual and Wide Rejection Bands Using Metamaterial and Electromagnetic Bandgaps Techniques

This research article describes a technique for realizing wideband dual notched functionality in an ultra-wideband (UWB) antenna array based on metamaterial and electromagnetic bandgap (EBG) techniques. For comparison purposes, reference was initially designed comprising hexagonal patches that are interconnected to each other. The fabricated standard FR-4 substrate with thickness of 0.8 mm. exhibited average gain 1.5 dBi across 5.25–10.1 GHz. To improve the array’s impedance bandwidth application UWB systems (MTM) characteristics were applied it. involved embedding slots patch shorting ground-plane metallic via. essentially transformed composite right/left-handed structure behaved like series left-handed capacitance shunt inductance. proposed MTM now operated over much wider frequency range (2–12 GHz) 5 dBi. Notched band incorporated eliminate unwanted interference signals from other wireless communications coexist inside spectrum. achieved by introducing etching circular aligned underneath interconnecting microstrip-line array. techniques had no effect dimensions (20 mm × 20 0.87 mm). results presented confirm dual-band rejection at local area network (WLAN) (5.15–5.825 X-band satellite downlink communication (7.10–7.76 GHz). Compared designs previously published footprint is smaller its notches completely cover interfering signals.