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Wideband Slot Antenna for WLAN Access Points

Medeiros, C. R. ; Lima, E.B. ; Costa, J.R. ; Fernandes, C. A.

IEEE Antennas and Wireless Propagation Letters Vol. 9, Nº s/n, pp. 79 - 82, March, 2010.

ISSN (print): 1536-1225
ISSN (online): 1536-1225

Journal Impact Factor: 1,312 (in 2008)

Digital Object Identifier: 10.1109/ICTON.2009.5185092

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Abstract
This letter presents a new printed slot antenna with cavity back for WLAN Access Points (Base Stations) providing wideband operation bandwidth at least from 2.5 to 4.8 GHz. The design is based upon an ultrawideband antenna configuration modified with the inclusion of a cavity back in order to produce stable unidirectional radiation pattern. The new configuration also ensures a stable linear polarization with cross-polarization level below -20dB. Results are confirmed with measurements. Not disregarding other applications, the new design is especially adequate for MIMO space and polarization diversity arrangements, presenting low cross-polarization and very low coupling to adjacent elements.