Citation

Mohd Redzwan, Fatimah Nur and Abd Rahman, Nurul Huda and Yamada, Yoshihide and Subahir, Suhaila and Idrus, Intan Izafina and Md Jizat, Noorlindawaty and Miswadi, Nurfarahin (2024) Dual-layer 4x4 Butler Matrix for 5G application through Via Optimization. In: 2024 International Symposium on Antennas and Propagation (ISAP), 05-08 November 2024, Incheon, Korea,.

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Abstract

In a 5G base station, a Butler Matrix (BM) feed circuit is requested to achieve multibeam patterns while maintaining a compact structure. However, the conventional design and size raise issues in installation and efficiency, especially at the lower 5G band, the 3.5GHz. To cater to many antenna elements, the BM size is increased, and the losses are severe, affecting the phase sensitivity. To address these issues, a stacked 4x4 BM with a dual-layer thin substrate is connected through non-uniform vias that act as a fine-tuning mechanism, where the desired phase difference is obtained by adjusting the circular slot diameter of the via. The BM features a low-profile structure with a ����Ȝ[���ȜGLPHQVLRQ, a significant reduction from the conventional 4x4 BM. The designed BM measured results show transmission amplitude of -7dB, and an acceptable range of output phase difference at the operating band.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Butler Matrix, 5G, dual-layer
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	28 Feb 2025 04:26
Last Modified:	28 Feb 2025 04:26
URII:	http://shdl.mmu.edu.my/id/eprint/13547

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