关键词: UWB天线；三陷波；小型化；微带天线

Abstract:

A novel and small triple-band notched UWB antenna property is proposed. The proposed antenna that composed of a circular patch, a defected ground and a pair of split resonant rings fed by 50Ωmicrostrip. The triple rejection is achieved by etching an annular ring radiating patch with a pair of Y-shaped resonant elements that are embedded inside the patch, a U-shaped patch on the ground and a pair of split resonant rings. The fabricated antenna has a tiny size, only 30 mm×30 mm×1.6 mm. The experinental and measured results show that the proposed antenna exhibits an impedance bandwidth over an ultra-wideband frequency range from 2.9 to 10.7 GHz with return loss less than -10dB, except three stopbands at 3.7~4.2 GHz, 5.15~5.825 GHz and 7.9~8.4 GHz for filtering the C, WLAN and X band signals respetively. It also demonstrates a nearly omnidirectional radiation pattern and a stable gain. The simulated results are compared with the measured performance and show good agreements．

Key words: UWB antenna;triple-band notched;miniature antenna;mircostrip antenna