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Aperture UWB antenna with triple band-notched characteristics

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4 Author(s)
Liao, X.-J. ; Dept. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China ; Yang, H.-C. ; Han, N. ; Li, Y.

A novel semi-circle-shaped aperture ultra-wideband (UWB) antenna with triple band-notched characteristics is proposed. The band notches are realised by etching one complementary split-ring resonator inside a circular exciting stub on the front side, employing a interrogation-shaped defected ground structure in each side of the ground plane as well as symmetrically adding a pair of open-circuit stubs at the edge of the slot, and tri-band rejected filtering properties in the WiMAX/WLAN are achieved. Experimental results show that the designed antenna, with compact size of 24 × 30 × mm2, has an impedance bandwidth of 2.6 - 12 - GHz for VSWR less than 2, except three freqency stop-bands of 3.3 - 4, 5.15 - 5.4, and 5.8 - 6.1 - GHz. Moreover, the antenna has good omnidirectional radiation patterns in the H-plane.

Published in:

Electronics Letters  (Volume:47 ,  Issue: 2 )