Implementation of Circular and Hexagonal Array Geometries in Smart Antenna Applications

Space division multiple access (SDMA) is a promising candidate for improving channel capacity in future wireless communication systems. Since the discrimination performance of the user in the spatial domain depends on the array arrangement, an optimum element arrangement for SDMA should be defined. Thus beam forming is very important and provides fundamental theory. However the pattern of antenna array is determined by array geometry. Two-dimensional (2-D) spatial filters that can be implemented by microstrip technology are capable of filtering the received signal in the angular domain as well as the frequency domain. This paper focuses on various geometry of eight and nine elements antenna array using circularly patch elements as well as hexagonal array with seven elements