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Beamforming steering implementation using substrate-integrated waveguide Butler matrix and slotted array antenna for 5G n257 band

Published online by Cambridge University Press:  19 December 2024

Ming-An Chung Open the ORCID record for Ming-An Chung [Opens in a new window] ,
Ming-Chang Lee Open the ORCID record for Ming-Chang Lee [Opens in a new window] ,
Chia-Chun Hsu  and
Chia-Wei Lin
Ming-An Chung*
Affiliation:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan
Ming-Chang Lee
Affiliation:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan
Chia-Chun Hsu
Affiliation:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan
Chia-Wei Lin
Affiliation:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan
*
Corresponding author: Ming-An Chung; Email: [email protected]
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Abstract

This paper introduces a method to realize beam switching by using a substrate-integrated waveguide (SIW) Butler matrix combined with a slot array antenna. The Butler matrix consists of two hybrid couplers, two crossovers, two −45-degree phase shifters, and two 0-degree phase shifters. The slot array antenna is a 4 × 2 array. The operating frequency band of the slot array antenna, where the reflection coefficient is below −10 dB, is 26.5–31.5 GHz. The measured beamforming angles from input port 1 to input Port 4 of the Butler matrix are +46, −16, +15, and −50°, respectively. The corresponding antenna gains from input Port 1 to input Port 4 are 11.57 dB, 14.284 dB, 10.94 dB, and 12.864 dB, respectively. The dimensions of the Butler matrix and the slot array antenna are 56.8 mm × 21.2 mm × 0.254 mm. The dimensions of the SIW transmission channels between the Butler matrix and input Ports 1– 4 are 16.9 mm × 34 mm × 0.254 mm.

Keywords

antenna arraybeam switchingButler matrixmillimeter wavesubstrate-integrated waveguide
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Issue 8 , October 2024 , pp. 1381 - 1396
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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