Design of multiresonance loop shape microstrip antenna for ultra wide band wireless communication applications

A novel multiresonance loop shape microstrip antenna (MRLMSA) for ultra wide band wireless communication applications is presented. The designed radiating antenna consists of a two loop shaped ring resonators around the single monopole hexagon patch. This antenna is powered through stepped co-planar waveguide (CPW) fed. The stepping fed is used to improve the antenna electrical characteristics at the centre and at higher frequencies. The stepping fed and ground formation will also provide the impedance matching with the radiating patch. This antenna is used for characterisation in ultra wide band frequency range from 3.1 GHz to 10.6 GHz. The antenna is designed and simulated on an Fr4_epoxy substrate of dimensions (L) × (W) = 72.25 mm × 51 mm having dielectric constant ε_r = 4.4, relative permeability = 1, thickness t = 1.53 mm, loss tangent tan δ = 0.002 and lande G factor 2. The size of the radiating patch is specified by Length × Width is (L1) × (W1) and edge length is (S1) for impedance matching, constant gain, steady radiation patterns, and constant group delay over the UWB frequency range. The two loop rings are used around the monopole hexagon is to provide the multiresonance radiation characteristics. The speciality of the design and its dimensions is that, within two loop rings and a monopole patch it gives multiresonance response in the UWB frequency range from 3.1 GHz to 10.6 GHz. An optimized MRLMSA is designed and simulated on an Ansoft-HFSS simulation software and a comparative statement of result is also proposed. This antenna is useful in the UWB wireless communication systems i.e. MIMO-Multi-Input Multi-Output UWB system for short range, higher power transmission with higher bandwidth requirement. This antenna is also used in other wireless systems such as WLAN, WiMax etc for notch (filter)applications.