Design and analysis of dielectric resonator antenna for ultrawide band and ka band applications

Abstract

Here the design of a simple and a generic transmission line (T.L.) circuit approach along with a fast and generic formulation for the novel antenna model is developed. The proposed antenna is a specific shaped placed on a material of dielectric constant of ƒÃ equal to 4.4(FR 4) and size of 26mm~28mm. The ƒÃ (epsilon) value of dielectric resonator is taken to be 2.1 (material: Teflon). A simple micro strip line feeding of novel design has been used to feed the antenna. The ground plane is considered to be 26mm~11.7mm in size. The proposed antenna is simulated and a return loss of -10db below is obtained which is in the range of 3.67 GHz to 9.18 GHz. The proposed DRA can cover maximum frequency range of the UWB band. The Directivity of the antenna is simulated to be 9.054dbi .The proposed antenna can be used for UWB wireless networks. In a similar way the design of another DR antenna having specific antenna model is developed. The proposed antenna is modeled as an I-shape and is placed on a material of dielectric constant of ƒÃ equal to 2.2(Teflon material) and size of 15mm~11mm. The ƒÃ (epsilon) value of dielectric resonator is taken to be 10.2 (material: Rogers RO3010). The proposed antenna is simulated and a return loss of -10db below is obtained which is in the range of 30.58 GHz to 39 GHz. Here a good return loss is obtained at two peaks whose values are -21db at 31.54 GHz and a value of -22db at 35.39 GHz. In this paper a bandwidth improvement of 24.36% has been achieved. In addition to that a total efficiency of 72.88% is found at 35.39 GHz and 69% is found at 31.54 GHz. A directivity of 10.2dbi at 35.39 GHz and a 7.61dbi at 31.54 GHz have been claimed, besides that a significant gain of 10.59db at a frequency of 35.39 GHz and 8.34db at 31.54 GHz. The designed antenna is proposed for applications in the area of satellite communications, radio location, and imaging systems for weapon and hazardous material detection.