A Disc Shape Monopole Antenna with Tri-Band-Notched 2.55/3.5/5.5 GHz Characteristics

Abstract

A tri-band notch with Bluetooth ultrawideband(UWB) (3.1-11 GHz) antenna is introduced. Octagonal radiating patch and ground plane is used to achieve ultrawideband frequency. I-shaped and U-shaped parasitic, C slots with half wavelength and band-notch characteristics are used to avoid interference between ultrawideband (UWB) system and C-band system of the proposed antenna.FR-4 substrate is used to design proposed antenna and the dimensions of 32x36mm2. Feeding is provided with the help of microstrip line.The antenna also has parasitic elements at both of it sides. The antenna proposed here covers multiple bands and has impedance bandwidth from 2.39GHz to 4.71 GHz, 3.42 to 4.5GHz, 4.8 to 6.3 GHz and 7.8 to 12.6GHz. Thus it covers Bluetooth band, C band, WLAN band Wi MAX bands, and X band. The proposed antenna shows perfect impedance matching bandwidth, constant gain and omni-directional radiation pattern over the ultrawideband frequency.