Design of a Compact Tri-band Ring Antenna Using Two Parasitic Ring Resonators and Partial Ground Plane for WiMAX and RADAR Applications

In this paper, advanced planar monopole antenna for triple-band applications is proposed. The simulated results show that the proposed antenna operates at three resonant frequencies at 3.5 GHz, 9 GHz and 12 GHz, which covers different wireless communication applications. The proposed antenna consists of a quasi-modified circular radiating patch with a partial ground plane and two parasitic elements (open-loop-ring resonators) to serve as coupling-bridges. A stepped cut at the partial ground plane is used, to achieve the multi-band features. The proposed antenna is simulated and optimized using High-Frequency Simulation System (HFSS). The antenna topology possesses an area of 25×19 mm
²
. The measured results demonstrate that the proposed antenna has impedance bandwidths for 10 dB return loss which meet the requirements of worldwide interoperability for microwave access (Wi-MAX) and RADAR applications. An Acceptable agreement is obtained between measurement and simulation results. Experimental results show that the antenna is successfully simulated and measured.