Design of a 28 GHz Switched Beamforming Antenna System Based on 4×4 Butler Matrix

Title & Authors
Design of a 28 GHz Switched Beamforming Antenna System Based on 4×4 Butler Matrix
Park, Seongchun; Kim, Seunghyeon; Sohn, Jihoon; Shin, Hyunchol;

Abstract
In this paper, a switched beamforming antenna system at 28 GHz frequency band is described for $\small{5^{th}}$ generation wireless communication. The butler matrix is used as a beamforming system and it produces linear spaced phase difference at four output ports. Array antenna is designed that can be steered in desired 4 different directions 28 GHz frequency band. Operation of designed butler matrix that composed of couplers and feedline is explained. The antenna system is designed in RO3003 substrate that has a height of 5 mil and dielectric constant of 3. The size of butler matrix is $\small{20.3{\times}13.0mm^2}$ and size of array antenna is $\small{21.2{\times}19.9mm^2}$. This system can be steered from $\small{-34^{\circ}}$ to $\small{33^{\circ}}$ and minimum sidelobe level is 12.9 dB.
Keywords
Beamforming;Switched-Beamforming;Millimeter-Wave;Butler Matrix;Array Antenna;
Language
Korean
Cited by
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