CPW-fed capacitor loaded miniaturized dual band antenna

Abstract

This paper presents the design and analysis of a low profile compact Coplanar waveguide fed monopole antenna loaded with metamaterial inspired structure. The Zeroth Order Resonance phenomenon of CRLH Transmission Line has been explored to reduce antenna size however the antenna is fabricated single layered without any via. The proposed structure offers compact size with dimensions of the radiating element (0.06λ ₀ × 0.053λ ₀ ) and lower resonance band centered at 2.5GHz. While the upper band due to the regular monopole resonance is at 6.8GHz enabling possibility of dual band operation with an impedance bandwidth (|S ₁₁ |<; -10dB) of 9.43% and 29% at lower and upper band respectively. The antenna offers stable radiation characteristics with peak gain of 4.1dB and 4.95dB for the first and second band respectively.