A new compact and low phase imbalance microstrip coupler for 5G wireless communication systems


I. Yahya, Salah and Zubir, Farid and Nouri, Leila and Yusoff, Zubaida and Chaudhary, Muhammad Akmal and Assaad, Maher and Rezaei, Abbas and Nguyen Le, Binh (2023) A new compact and low phase imbalance microstrip coupler for 5G wireless communication systems. PLOS ONE, 18 (12). e0296272. ISSN 1932-6203

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Microstrip couplers play a crucial role in signal processing and transmission in various applications, including RF and wireless communication, radar systems, and satellites. In this work, a novel microstrip 180˚ coupler is designed, fabricated and measured. The layout configuration of this coupler is completely new and different from the previously reported Ratrace, branch-line and directional couplers. To obtain the proposed coupler, the meandrous coupled lines are used and analyzed mathematically. To improve the performance of our coupler, an optimization method is used. The designed coupler is very compact with an overall size of 0.014λg2 . The obtained values of S21 and S31 are -3.45 dB and -3.75 dB, respectively at the operating frequency, while the fractional bandwidth (FBW) is 56.2%. It operates at fo = 1.61 GHz (suitable for 5G applications) and can suppress harmonics up to 2.17fo. Another advantage of this coupler is its low phase imbalance, while the phase difference between S21 and S31 is 180˚± 0.023˚. Therefore, our device is a balanced coupler with ±0.3 dB magnitude unbalance at its operating frequency. It is important to note that it is very difficult to find a coupler that has all these advantages at the same time. The proposed 180˚ coupler is fabricated and measured. The comparison shows that the measurement and simulation results are in good agreement. Therefore, the proposed coupler can be easily used in designing high-performance 5G communication systems.

Item Type: Article
Uncontrolled Keywords: 5G communication systems
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: 21 Feb 2024 04:33
Last Modified: 21 Feb 2024 04:33
URII: http://shdl.mmu.edu.my/id/eprint/12086


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