Citation

Md Jizat, Noorlindawaty and Yii, Clement Ming Kiat and Ahmad, Nazihah and Mahmud, Azwan and Roslee, Mardeni and Yamada, Yoshihide (2024) Design of a Four-Port Butler Matrix and Analysis of the Crossover at 28 GHz. In: 2024 Multimedia University Engineering Conference (MECON), 23-25 July 2024, Cyberjaya, Malaysia.

Text Design of a Four-Port Butler Matrix and Analysis of the Crossover at 28 GHz.pdf - Published Version Restricted to Repository staff only Download (1MB)

Abstract

The investigation of millimeter wave bands in the 5G network is prompted by the increasing demand for future mobile wireless data traffic. Frequency Range 2 band at 28 GHz has been selected as a frequency band that prioritizes short range and high data rate capabilities. At 28 GHz, beamforming is an important element in providing the platform which requires thousands of antennas to enable an effective communication. Butler Matrix (BM) in beamforming networks is a preferred method for passive feeding due to its simple structure and cost-effectiveness. The integration of branch-line couplers, crossovers, and phase shifters with array antennas in a 4 × 4 Butler Matrix allows for the generation of four distinct beams within the ±180° plane. Yet, in the planar configuration, significant isolation is present because of the crossover components. However, crossover is an important element in the Butler Matrix design, requiring an acceptable range of isolation when linking the two lines of transmission line of the branch-line coupler and minimal coupling between the ports. This project utilizes a low dielectric constant substrate, specifically NPC-F220A from Nippon Pillar Packing Co. Ltd., which has a low-loss tangent, dielectric constant of 2.2, and thickness of 0.254 mm. A thorough evaluation and design of the crossover component in the Butler Matrix elements are described. The outcome of the simulation and measurement shows the S-Parameter and power flow of the branch-line coupler, crossover, phase shifter, and Butler Matrix including return loss, transmission amplitude, output phase, and isolation. The result of the performance can be applied to the 5G wireless beamforming communication platform at 28 GHz

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	5G
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:	07 Feb 2025 00:31
Last Modified:	07 Feb 2025 00:31
URII:	http://shdl.mmu.edu.my/id/eprint/13382

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