A novel low-cost high-gain antenna design from cuboids and differential strips

摘要

This article proposed a novel broadband high-gain antenna designed by suspended cuboids and differential shorting strips on a circular ground plane. The design structure of the proposed antenna is simple and all its components such as cuboids, strips, and ground plane are fabricated by a copper sheet of thickness 0.5 mm. The proposed antenna has measured -10 dB impedance bandwidth (IBW) 45% (2.35-3.7 GHz) with broadside gain of 10.1 +/- 0.4 dBi over IBW. The use of differential strips in inner cuboid improved the cross polarization and enhanced the broadside gain. The measured antenna has low cross polarization is below 25 dB in the broadside direction over IBW. The proposed antenna has 1 dB gain-bandwidth 53% (2.2-3.8 GHz) in the broadside. The antenna has been fabricated and measured; the results show a good agreement with simulated results.