Wideband antenna with notches at frequencies of existing services band using EBG

This paper presents a design of an UWB antenna, which is considered as a basic design. Under the basic antenna design EBG structures were added in order to create notches. These notches were created at the frequencies of existing services. The aim of the research was to create band-notch properties in the WiMAX (3.3-3.6GHz), lower WLAN (5.15-5.35GHz) and higher WLAN (5.725-5.825GHz) bands using EBG structures and to do so, different types of EBG structures were used. The antenna system consists of a sheet of Rogers Duroid 5880 substrate having relative permittivity as 2.2. Firstly basic UWB antenna was designed and then two mushroom type rectangular EBG cells were included on both the sides of feed line of the antenna, which will create notch at higher WLAN band. Further another notch was created using fork type EBG structures on both the sides of feed line of the antenna and above rectangular EBG structure. Through the proposed design notch at the frequency of higher WLAN band was successfully achieved.