A 28 GHz CMOS Butler matrix for 5G mm‐wave beamforming systems

A 28 GHz CMOS Butler matrix for 5G mm‐wave beamforming systems

This paper presents 28 GHz CMOS 8×8 Butler matrix which can improve the beamforming capability in 5G mm‐wave communication systems. The proposed 28 GHz N×N Butler matrix can increase the number of the antenna beam pattern from N to 2N − 1 beams with DP8T switch network including a lumped 180° couple...

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Veröffentlicht in:Microwave and optical technology letters 2020-07, Vol.62 (7), p.2499-2505
Hauptverfasser: Park, Jeongsoo, Kim, Jeong‐Geun
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Sprache:eng
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28 GHz N×N Butler matrix
2N − 1 beam
beamforming
CMOS
DP8T switch network
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description This paper presents 28 GHz CMOS 8×8 Butler matrix which can improve the beamforming capability in 5G mm‐wave communication systems. The proposed 28 GHz N×N Butler matrix can increase the number of the antenna beam pattern from N to 2N − 1 beams with DP8T switch network including a lumped 180° coupler, 22.5° phase shifter, and switches. The beamformer is fabricated using 65 nm CMOS process and the size is 1.8 × 2.5 mm2. The DC current consumption is 145 mA (Rx) and 180 mA (Tx) at 2.5 V supply voltage. The proposed 28 GHz CMOS 8×8 Butler Matrix is able to make 15 beam patterns with ±63° beam scan and low sidelobe level, which is suitable in low cost 5G mm‐wave beamforming system.
doi_str_mv 10.1002/mop.32353
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subjects 28 GHz N×N Butler matrix
2N − 1 beam
beamforming
CMOS
DP8T switch network
title A 28 GHz CMOS Butler matrix for 5G mm‐wave beamforming systems
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