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Design and analysis of a compact wideband pattern-reconfigurable antenna with alternate reflector and radiator

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4 Author(s)
Zhang, G.-M. ; Inst. of Appl. Phys., Univ. of Electron. Sci. & Technol. of China, Chengdu, China ; Hong, J.-S. ; Song, G. ; Wang, B.-Z.

The authors present a novel compact wideband pattern-reconfigurable antenna with alternate reflector and radiator. The proposed antenna consists of a pair of step-shape patches, four switches and a coplanar waveguide feeding line. By setting the switches ON or OFF, the two step-shape patches can alternately switch between the radiator and the reflector. As a result, the proposed antenna is able to provide two-directional radiation patterns whose main beams are roughly directed in opposing directions from 3.7 to 6 GHz. Compared with other current pattern-reconfigurable antennas, the proposed antenna exhibits advantages of better back-to-front radiation ratio, more compact antenna size and wider operating band. In this investigation, the optimised size of the proposed antenna is 20 20 mm2, which equates to 0.25×0.25×020 is the wavelength at the low edge of the operating frequency band). In addition, the time-domain characteristics of the proposed antenna are presented and analysed. The antenna shows a good time-domain performance. Measured results are presented.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:6 ,  Issue: 15 )

Date of Publication:

December 11 2012

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