New Design of Wideband Microstrip Branch Line Coupler Using T-Shape and Open Stub For 5G Application


Abdulbari, Ali Abdulateef and Abdul Rahim, Sharul Kamal and Abd Aziz, Mohamad Zoinol Abidin and K G, Tan and N K, Noordin and M. Z. M., Nor (2020) New Design of Wideband Microstrip Branch Line Coupler Using T-Shape and Open Stub For 5G Application. International Journal of Electrical and Computer Engineering (IJECE), 11 (2). pp. 12003-12013. ISSN 2088-8708

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A new design of wideband branch-line coupler (BLC) using T-shape with open stub microstrip line is proposed. The branch line coupler is integrated with low and high impedance λ/4 transmission lines to achieve the comparatively compact size of (27.2 mm × 16.5 mm). Operating the bandwidth in simulated of BLC from 2.9 to 4 GHz is obtained 30.22% with a frequency center of 3.5 GHz. Meanwhile, the measured bandwidth of the BLC is cover from 2.8 GHz to 4.22 GHz is equal 33.40% at the center frequency 3.55 GHz respectively. The BLC simulated has low isolation and high return loss of -29.28 dB and -30.69 dB at the center frequency 3.5 GHz. Whereas, the measured result has a simple difference in the return loss and isolation are - 27.43 dB and -24.46 dB at the frequency 3.55 GHz respectively. This BLC design has a good coupling factor of -2.97 and insertion loss of -3.65 dB. Furthermore, it obtains an excellent amplitude and phases different between two output of ±0.1 and 93.6°±3.4° with high performance. There is a good agreement between the simulated result and the measured result. This branch line coupler design used for 5G applications for future wireless communication systems.

Item Type: Article
Uncontrolled Keywords: 3-dB branch-line coupler; 5G; Phase shift; Slot T shape; T- model open stub; Wideband BLC
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK7871 Electronics--Materials
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 23 Sep 2021 12:55
Last Modified: 23 Sep 2021 12:55


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