volume | PIER Journals

Abstract

This paper proposes a new design of reconfigurable three-sector dual-mode dual-polarized antenna for use primarily in mobile communication base stations. The design offers the flexibility to be used as a sectorial (directive) or omnidirectional base station antenna whenever required. The two different radiating modes (omnidirectional and sectorial) depend only on the excitation scenario. The proposed antenna has the advantages of offering broadband, stable radiation pattern and high polarization purity within the desired frequency band, and a simple feeding structure with a remarkable compact size (less than 800 cm³) and low profile. The achieved fractional bandwidth is 55.3% (1.7-3 GHz). The antenna design principle is validated by constructing and testing a prototype with the two modes of operation. An eight-element linear array is then constructed and synthesized as a reconfigurable base station. Results demonstrate how the design may be packaged in a compact size to offer excellent omnidirectional or sectorial performance which makes this new design an ideal candidate for reconfigurable dual-mode mobile base stations.

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Dr. Ahmed Alieldin

Dr. Yi Huang

Dr. Stephen J. Boyes

Dr. Manoj Stanley