Design of linearly fed shaped-beam-pattern microstrip antenna array

In this paper, an eight-element shaped-beam-pattern microstrip antenna arra y for the base station in a mobile communication system has been designed. A cosecant pattern in the main beam which allows a constant power distribut ion in the service zone is achieved by feeding linearly varied amplitudes a nd phases into elements of the array. The array operates at 27.5 GHz, and a tilt angle of about 20 degrees front the broadside is obtained. The sidelo bes are on the order olf -10 dB, and the cross-polarization level is about -20 dB. (C) 2000 John Wiley & Sons, Inc.