6 GHz Altı 5G Kablosuz Haberleşme Uygulamalarında Butler Matris Besleme Hattı İçin Küçük Boyutlu Atlama Tasarımı

Abstract

The butler matrix is one of the passive feeding networks used with array antennas to form beams. There are several advantages to using this beamforming network. One of them is that it is easy to manufacture, and the other is that it is low in cost. Butler matrix structure consists of three passive microwave components. These are directional hybrid couplers, phase shifters, and crossovers. A crossover is a passive microwave component used to cross between two lines with high isolation between them. This article presents microstrip crossover for use in Butler matrix feeding networks designed for 5G applications. The crossover has been presented in the article was designed and simulated. The proposed crossover operates at 4.5 GHz and it is designed for use in mostly butler matrix applications. The crossover has been proposed in the article has been designed using the FR-4 substrate. The dielectric constant of the used substrate is 4.3 and the thickness is 1.57 mm. The size of the designed crossover is 62.8 x 27.8 mm^2. The reflection coefficient and isolation level are in the permissible level in order for the proposed crossover to be utilized in the Butler matrix beamforming network for 5G the application. The return loss value of the designed crossover is 26.09 dB at 4.5 GHz. Same time the isolation value is 22.78 dB.