Meander Line and Loop Resonator Loaded Dual Band Electrically Small Antenna

This paper presents the design and analysis of dual band electrically small antenna loaded with meander line and loop resonator. The proposed electrically small antenna (ESA) is designed on the FR-4 substrate with modified ground plane. The radiating element of the proposed antenna consists of metallic strip loaded with thin inductive meander line and a resonant triangular loop. The presented configuration gives dual band response at 1.81 GHz and 2.56 GHz. The higher resonance frequency is controlled by tuning the effective length of metallic strip. The lower frequency response i.e. 1.81 GHz is achieved by using the combination of the shunt inductive meander lines topped with a triangular loop resonator. The surface area of the presented antenna is 40 mm× 15 mm. The designed antenna exhibits fractional bandwidth of 3.8% and 21% for 1.81 GHz, and 2.56 GHz respectively. The measured and simulated results are in near agreement proving the effectivity of the resonator.