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Wideband U-slot microstrip patch antenna array

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3 Author(s)
Lau, K.L. ; Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China ; Luk, K.M. ; Lee, K.F.

The design and measured results of a wideband antenna array of four U-slot rectangular patches are presented. The U-slot patches are proximity coupled by a microstrip feed line terminating with novel Π-shaped stubs. By using a foam layer of thickness t~5.5 mm as the supporting substrate, an impedance bandwidth (SWR⩽2) of 27% ranging from 3.4 GHz to 4.5 GHz is achieved. It has an average gain of 13 dBi and a cross-polarisation of less than -20 dB

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Microwaves, Antennas and Propagation, IEE Proceedings  (Volume:148 ,  Issue: 1 )