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A Wideband Slot-Coupled Stacked-Patch Array for Wireless Communications

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5 Author(s)
Caso, R. ; Dept. of Inf. Eng., Univ. of Pisa, Pisa, Italy ; Serra, A.A. ; Pino, M. ; Nepa, P.
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In this letter, a novel slot-coupling feeding technique is used to realize a dual-polarized 2 × 1 microstrip stacked patch array for mobile wireless communication systems. The array is intended as a basic module for base-station linear arrays, whose final size depending on beamwidth and gain requirements. Each array element is fed through two microstrip lines arranged on the basis of a sequential rotation technique. Each stacked square patch is excited through a square ring slot realized in the feeding network ground plane. Design procedure, simulation results and measurement data are presented for a 2 × 1 array working in the GSM 1800-1900 band (1710-1910 MHz), UMTS band (1920-2170 MHz), ISM band (2400-2484 MHz), and UMTS 3G expansion band (2500-2690 MHz) or, alternatively, WiMAX band (2300-2700 MHz), with a resulting 45% percentage bandwidth (reflection coefficient <; -10 dB). Due to both the symmetry properties of the novel slot-coupling feeding configuration and the implementation of a sequential rotation technique, good results have been obtained in terms of port isolation and cross-polar radiation patterns.

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Antennas and Wireless Propagation Letters, IEEE  (Volume:9 )

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