A COMPACT ULTRAWIDEBANDANTENNA WITH BAND-NOTCHES AT WIMAX AND WLAN BANDS

摘要

A circular disk-shaped monopole ultra-wideband (UWB) antenna having a small area of 26 x 31 x 1.6 mm3 was proposed in this paper. The antenna printed on FR4 material of permittivity 4.4 and height of 1.6mm. Microstrip line having a width of 3mm is used to excite antenna. The band-notch from 3.2 to 3.7 GHz is achieved by incorporating C-shape slot having a length of 28 mm on the radiating patch. Two symmetrical C-shaped strips are placed near to the feeding line edges to achieve another notch at 5 to 6 GHz. The proposed antenna is operating in the whole ultra-wideband from 2.4 to 11.8 GHz while rejecting electromagnetic interference from WiMax and WLAN systems. The simulated results such as S-parameters, VSWR, radiation patterns, current distributions, and gain shows that the antenna is well appropriate for wireless portable devices.