Compact Broadband Dipole Antenna with Split Ring Resonators

Abstract

A compact broadband low-profile dipole antenna with split ring resonators (SRRs) is presented. The antenna is composed of a conventional dipole element and two SRRs. Each arm of the printed dipole is enclosed by a printed SRR to provide the favorable electromagnetic environment for coupling. Three modes are generated, which interact together to provide broadband characteristics, covering 1.45 GHz to 2.49 GHz (|S11| <-10 dB bandwidth of 52.79%). The antenna is computationally demonstrated to have broadband characteristics and stable gain with symmetric radiation patterns. The compact antenna with overall dimensions of 10.2 mm × 74.6 mm × 0.508 mm (0.067λo × 0.489λo × 0.0033λo at 1.97 GHz) has a radiation efficiency > 90%. The compact size, simple structure, and stable radiation properties of the antenna increase its suitability for many wireless communication applications.