Dual Ring Loaded Patch with Tri-band Resonance

A patch antenna with its tri-band resonance at 1.8 GHz, 2.5 GHz and 3.59 GHz has been designed and a method to miniaturize the size using a metamaterial with dual circular ring loaded at its ground layer has been discussed. The reduced size patch with dual circular ring loaded at ground layer provides a resonance similar to its patch with unloaded ground layer while providing similar antenna parametric results for its reflection coefficient, gain, bandwidth and efficiency. The effect of loading the dual circular ring at the ground layer provides a mechanism for size reduction (from the original patch size of 41.5 mm x 31 mm to 36 mm x 28 mm) in the patch of about 21.64 %. The proposed antenna is perfectly suited for its application in wireless media due to its resonance at three frequency band.