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Compact CPW-fed antenna with two asymmetric U-shaped strips for UWB communications

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3 Author(s)
Tang, Z.J. ; Coll. of Inf. & Electr. Eng., Hunan Univ. of Sci. & Technol., Xiangtan, China ; Zhan, J. ; Liu, H.L.

A novel coplanar waveguide (CPW)-fed printed antenna with two asymmetric U-shaped strips is designed and analysed for ultra-wideband wireless applications. The asymmetric radiating structure with two U-shaped strips and a staircase-shaped strip is adopted in the proposed antenna which broadens the bandwidth to a great extent. The dimensions of the antenna are only 23 × 25.5 × 1.6 × mm. The antenna yields a wide bandwidth ranging from 3.0 to 12.9 × GHz with return loss less than -10 × dB with near-linear phase characteristics and stable antenna gain. Furthermore, the proposed antenna can achieve quasi-omnidirectional radiation patterns. The measured results agree well with the simulated prediction.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 14 )