A Novel UWB Antenna with Triple Band-Notched Characteristics

A novel planar monopole antenna with 3.9/5.5/8 GHz triple band-notched characteristics is proposed. The monopole antenna is composed of microstrip line and radiating patch where the large circle following connects with a small half circle, whereas the ground plane is printed on the other side. By adding a simple T-shaped resonator on the bottom side, two band-notched characteristics in the C-band (3.7-4.2 GHz) and X-band (7.6-8.6 GHz) are obtained at the same time. The band-notched characteristic in the WLAN (56 GHz) is obtained by etching spline curved strip in the radiating patch. The measured results are roughly consistent with the simulated. The proposed antenna is printed on a 22 mm x 32 mm, polytetrafluoroethylene (PTFE) substrate with relative permittivity of 2.65 and substrate thickness of 0.5 mm