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Fully Spatial Wide-Band Beamforming Using a Rectangular Array of Planar Monopoles


Monthippa Uthansakul and Marek E. Bialkowski

The University of Queensland

This paper describes a spatial beamformer which by using a rectangular array antenna steers a beam in azimuth over a wide frequency band without frequency filters or tap-delay networks. The weighting coefficients are real numbers which can be realized by attenuators or amplifiers.Aprototype including a 4x4 array of square planar monopoles and a feeding network composed of attenuators, power divider/combiners and a rat-race hybrid is developed to test the validity of this wide-band beamforming concept. The experimental results prove the validity of this wide-band spatial beamformer for small size arrays.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION

2006

February

54

2

527-533