Abstract:

A method was researched to ensure the uniformity of RX signals in long-distance coverage for 5G applications. In this situation, the antenna pattern model was critical. Firstly, the cosecant-squared shaped beam pattern meets the requirement of uniform coverage through the derivation. Secondly, by constrained optimization algorithm, antenna directivity was taken as objective function, the beam level of specified range was taken as constraint function, to solve the weight parameter of the linear array elements, and the cosecant square pattern could be obtained. MATLAB program completed to realize the algorithm. The innovation was based on constrained optimization algorithm, the real elements patterns were imported, even elevation angle element was proposed in this solution to solve the top blind problem. Finally, the signal level coverage area was compared with which do not have beamforming, it has been shown that cosecant-squared beamforming model can improve the signal uniformity obviously.

Key words: coverage uniformity, base station antenna, radiation pattern, cosecant-squared pattern