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UWB multi-beam antenna array for the microwave band

Abstract:

In this paper, the design and simulation of a microstrip ultra-wideband multi-beam antenna array is presented. This array consists of three UWB monopoles, which have been designed to work at frequencies from 4.5 GHz to 10 GHz. The monopoles present compact size and are mounted parallel to a reflector ground plane, thus, it is achieved a directive pattern of radiation. The bandwidth of the array is 2 GHz and includes frequencies from 5 GHz to 7 GHz. Furthermore, it is proposed a 3-way own design feeding network and a 4-way network based on Butler matrix. The first one will be used to feed the array. Every output port of the 3-way network is connected to the input of each monopole that is included in the array. These networks have been designed to provide similar phase shifts between adjacent input ports of the array with different values depending on which network input port is used. Using all network input ports simultaneously, it is possible to achieve the multi-beam effect on the antenna.