Abstract
As sparse arrays cost fewer elements, they are less expensive than dense arrays and could be applied widely in antenna and sonar deployment, two sparse cylindrical arrays are proposed in this paper. According to the characteristic of cylindrical array, it can be seen as a linear array whose elements are the identical circular arrays. Therefore the co-prime linear array and nested linear array could be combined with circular arrays. Based on the beam pattern of uniform cylindrical array, 1D and 2D beam patterns of co-prime cylindrical array and nested cylindrical array are derived respectively. In addition, when more than one sources are coming from arriving directions, the performance of sparse arrays are analyzed and compared. The simulation results show that the new proposed sparse cylindrical arrays not only reduce the number of elements, but also improves the resolution in comparison with an equal length uniform cylindrical array.
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