Design and investigation of printed monopole antenna with three band-notched structures for UWB applications

In this paper, a printed microstrip-fed monopole antenna for ultra-wideband range applications with multi band-notched functionality is designed and simulated. The antenna has a simple structure and miniaturized size so can be easily compatible with printed circuit board based systems. The design is used to filter the interferences due to coexisting narrow bands such as 3.3-3.7 GHz for WiMax, downlink 3.7-4.2 GHz for C-band, 5-6 GHz for WLAN as well as uplink 7.9-8.4 GHz and downlink 7.25-7.75 GHz frequency bands for X-band used for various wireless communications. The antenna is designed by using two different band-notching techniques such as embedding slots of various shapes in a radiation patch and putting parasitic stubs close to the radiator within antenna itself. The first band-notched structure a pair of L-shaped slot embedded on radiation patch notched WiMax and C-band. The second band-notched structure a C-shaped slot on radiation patch filter out WLAN band while third structure a pair of arc-shaped parasitic stub sited around the radiator suppressed X-band. The designed antenna is realized on FR4 substrate with relative permittivity 4.4 and the thickness of 1.6 mm. The parametric analysis of each band-notched structure is mention along with the surface current distributions are illuminated in detailed to examine the effects of these structures.