Split Ring Resonator Based 4-Element Printed Ultra-Wideband Array Antenna

摘要

This paper presents the design of a high gain microstrip array antenna for ultra-wideband applications with 2.4 GHz WLAN band rejection capability. The array configuration is featured with a novel corporate microstrip line feed structure to provide better impedance matching to the constituent radiating elements. The antenna geometry uses the rectangular patch element which is tapered by means of step in width transition at the patch-feed interface and the ground plane is partially metalized at the bottom side of the dielectric substrate to enhance bandwidth of the single element antenna. A pair of split- ring resonators of size 8.5 x 3 mm slot in the ground plane to reject the 2.4 GHz WLAN band. A peak realized gain of 15.52 dB and bandwidth of 8.78 GHz is obtained from the proposed array antenna model. The overall dimension of the antenna is around 60 x 136 x 1.6 mm3 on FR4 substrate material with dielectric constant 4.4. The 1x4 array antenna with notch band characteristics is designed, simulated in HFSS 3D EM software and characterized in terms of the input reflection coefficient, impedance bandwidth, far-field radiation patterns and gain.