Design of antenna array used as smart antenna for TD-SCDMA systems

Smart antenna technology is the key technique of third generation mobile communication standard TD-SCDMA. This paper presents a scheme for designing a kind of antenna array used as smart antenna for TD-SCDMA systems. Based on the design principle of adaptive antenna array and the concept of smart antenna, a uniform circular array consisting of some antenna elements, is employed in the scheme. The antenna elements are made by using a novel coaxial collinear printed dipole structure. An optimization design of the structure, size and performance parameters of both antenna elements and the antenna array is also performed by means of the global optimization algorithm. A large amount of simulation computation for the design is processed to instruct the manufacture of the experimental antenna array. A series of experimental tests are also performed to evaluate the performance of the developed antenna array with the experimental results given. The fact that experimental results are approximately in consistent with the simulation computation shows the effectiveness and feasibility of the design method. The design method proposed in this paper can be extended for the design of any other array geometry.