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Journal articles on the topic 'BRANCH-LINE COUPLER'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Han, Dae-Hyun. "Branch line directional coupler with coupled lines." Journal of the Korean Institute of Information and Communication Engineering 15, no. 2 (February 28, 2011): 286–91. http://dx.doi.org/10.6109/jkiice.2011.15.2.286.

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2

Myun-Joo Park and Byungje Lee. "Dual-band, cross coupled branch line coupler." IEEE Microwave and Wireless Components Letters 15, no. 10 (October 2005): 655–57. http://dx.doi.org/10.1109/lmwc.2005.856683.

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3

Sabri, Muataz Watheq, N. A. Murad, and M. K. A. Rahim. "Wideband Branch Line Coupler with Open Circuit Coupled Lines." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 2 (April 1, 2017): 888. http://dx.doi.org/10.11591/ijece.v7i2.pp888-893.

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This paper focuses on the design of a Wideband Branch Line Coupler by using open circuits coupled lines technique. The design is implemented by adding four open circuits coupled lines to the structure of the Conventional Branch Line Coupler. The proposed design of Wideband Branch Line Coupler is simulated using CST microwave software. The simulation results show that the coupler is operated at 3.8 GHz with coupling factor of -3dB and 90̊ phase difference between the two output ports. The prototype is fabricated and measured to validate the simulated results. A similar Wide Bandwidth is observed on simulation and measurement. The structure achieved a fractional bandwidth of 42.63%, and return loss of 21 dB compared to the Conventional Branch Line Coupler (BLC).

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4

Wu, Qiuyi, Yimin Yang, Mingzhong Lin, and Xiaowei Shi. "Miniaturized broadband branch-line coupler." Microwave and Optical Technology Letters 56, no. 3 (January 28, 2014): 740–43. http://dx.doi.org/10.1002/mop.28189.

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5

Gruszczynski, Slawomir, Robert Smolarz, Changying Wu, and Krzysztof Wincza. "Monolithic Miniaturized Differentially-Fed Branch-Line Directional Coupler in GaAs Monolithic Technology." Electronics 9, no. 3 (March 6, 2020): 446. http://dx.doi.org/10.3390/electronics9030446.

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In this paper, a design of a miniaturized branch-line directional coupler is presented. The coupler is designed with balanced coupled-line sections, which are electrically shortened by the application of lumped capacitors. To measure the parameters of the coupler, appropriate baluns have been designed. The coupler has been designed in a GaAs PH25 UMS (united monolithic semiconductor) technology with the center frequency of 24 GHz. The measured power split equals 3 dB with the transmission/coupling imbalance not exceeding 0.6 dB. The measured return losses equal 17 dB at the center frequency, whereas the isolation reaches 17 dB. The fabricated coupler‘s size equals 630 um × 487 um, which is 0.19 of the full size of the directional coupler in the chosen technology (1191 um × 1170 um).

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6

Shi, Jin, Jun Qiang, Kai Xu, Zheng-bin Wang, Longlong Lin, Jian-Xin Chen, Wei Liu, and Xiu Yin Zhang. "A Balanced Filtering Branch-Line Coupler." IEEE Microwave and Wireless Components Letters 26, no. 2 (February 2016): 119–21. http://dx.doi.org/10.1109/lmwc.2016.2516764.

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7

Bekasiewicz, A., and S. Koziel. "Miniaturised dual‐band branch‐line coupler." Electronics Letters 51, no. 10 (May 2015): 769–71. http://dx.doi.org/10.1049/el.2015.0751.

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8

Wu, Qi, Haiming Wang, Chen Yu, Xiaowei Zhang, and Wei Hong. "Dual-band SICL branch-line coupler." Microwave and Optical Technology Letters 57, no. 5 (March 25, 2015): 1246–49. http://dx.doi.org/10.1002/mop.29062.

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9

Chongcheawchamnan, Mitchai, Sakol Julrat, Mohammad F. Shafique, Burawich Pamornak, and Ian D. Robertson. "Frequency switchable branch-line hybrid coupler." Microwave and Optical Technology Letters 55, no. 7 (April 26, 2013): 1661–63. http://dx.doi.org/10.1002/mop.27648.

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10

Rhee, Seung-Yeop. "Miniaturization of Branch Line Coupler with Connected Coupled Lines." Journal of Korean Institute of Electromagnetic Engineering and Science 22, no. 6 (June 30, 2011): 598–604. http://dx.doi.org/10.5515/kjkiees.2011.22.6.598.

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11

Smolarz, Robert, Krzysztof Wincza, and Slawomir Gruszczynski. "Chebyshev-Response Branch-Line Couplers with Enhanced Bandwidth and Arbitrary Coupling Level." Electronics 9, no. 11 (November 2, 2020): 1828. http://dx.doi.org/10.3390/electronics9111828.

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A new approach to the synthesis of broadband branch-line couplers with arbitrary coupling level was investigated in this paper. It was shown that the operational bandwidth of a classic branch-line coupler can be increased by utilizing N-section impedance transformers added to each of the coupler’s ports. Furthermore, the obtained response can be approximated by the Chebyshev polynomial. Moreover, it was proven that for such couplers a range of coupling coefficient values can be obtained by the modification of classic branch-line topology. The analysis of the electrical parameters of the proposed branch-line couplers was comprehensively investigated. To verify the correctness of the proposed design procedures, 3-dB, and 6-dB broadband branch-line couplers operating at the center frequency of 2 GHz having return losses greater than 20 dB were designed, fabricated, and measured.

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12

Kim, Jong-Sung, and Ki-Bok Kong. "COMPACT BRANCH-LINE COUPLER FOR HARMONIC SUPPRESSION." Progress In Electromagnetics Research C 16 (2010): 233–39. http://dx.doi.org/10.2528/pierc10083011.

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13

Shi, Jin, Jun Qiang, Qinghua Cao, Wei Zhang, and Jian-Xin Chen. "An Enabling Multi-Operation Branch-Line Coupler." IEEE Access 7 (2019): 10374–82. http://dx.doi.org/10.1109/access.2019.2891816.

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14

Taravati, S., and M. Khalaj-Amirhosseini. "Compact dual-band stubless branch-line coupler." Journal of Electromagnetic Waves and Applications 26, no. 10 (July 2012): 1323–31. http://dx.doi.org/10.1080/09205071.2012.699393.

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15

Shry-Sann Liao, Pou-Tou Sun, Nien-Chung Chin, and Jen-Tee Peng. "A novel compact-size branch-line coupler." IEEE Microwave and Wireless Components Letters 15, no. 9 (September 2005): 588–90. http://dx.doi.org/10.1109/lmwc.2005.855378.

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16

Nosrati, Mehdi. "An extremely miniaturized microstrip branch-line coupler." Microwave and Optical Technology Letters 51, no. 6 (June 2009): 1403–6. http://dx.doi.org/10.1002/mop.24365.

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17

Liao, Zhen-Heng, Xu-Chun Zhang, and Xiao Yang. "A novel frequency-tunable branch line coupler." International Journal of RF and Microwave Computer-Aided Engineering 28, no. 1 (August 3, 2017): e21154. http://dx.doi.org/10.1002/mmce.21154.

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18

Sajadinia, Hamed, Masoud Dahmardeh, and Mohammad Khalaj-Amirhosseini. "Novel planar diplexer using branch-line coupler." Microwave and Optical Technology Letters 60, no. 11 (October 16, 2018): 2773–77. http://dx.doi.org/10.1002/mop.31484.

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19

Zhang, Jian, Wei Xue, and Xiao-Wei Sun. "Miniaturization and harmonic suppression branch-line coupler using short-circuit anti-coupled line." International Journal of Electronics 95, no. 8 (August 2008): 853–58. http://dx.doi.org/10.1080/00207210802155800.

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20

Hosseini, F., M. Khalaj-Amir Hosseini, and M. Yazdany. "To compact ring branch-line coupler using nonuniform transmission line." Microwave and Optical Technology Letters 51, no. 11 (November 2009): 2679–82. http://dx.doi.org/10.1002/mop.24703.

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21

Purnama, Arrizky Ayu Faradila, Aloysius Adya Pramudita, and Edwar Edwar. "ANALISA PERGESERAN FASA PADA PERANCANGAN DAN REALISASI BRANCH-LINE COUPLER UNTUK DETEKSI FASA PADA RADAR C-BAND." TEKTRIKA - Jurnal Penelitian dan Pengembangan Telekomunikasi, Kendali, Komputer, Elektrik, dan Elektronika 5, no. 2 (July 19, 2021): 35. http://dx.doi.org/10.25124/tektrika.v5i2.3990.

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Sejumlah radar menggunakan I/Q demodulator pada sisi penerima untuk melakukan pengolahan sinyal pantul dari objek yang diterimanya. I/Q demodulator merupakan suatu komponen yang berfungsi untuk memproses sinyal RF ke sinyal I (In-phase) dan sinyal Q (Quadrature). Pada I/Q demodulator, sinyal masukkan akan dikalikan dengan dua sinyal dari LO (Local Oscillator) yang masing-masing berbeda fasa 90 yang kemudian digunakan sebagai mekanisme pendeteksi fasa. Branch-line coupler merupakan suatu rangkaian penggeser fasa yang dapat diimplementasikan dalam membangun I/Q demodulator. Akurasi pergeseran fasa yang dihasilkan branch-line coupler akan memberikan pengaruh terhadap hasil deteksi fasanya. Dalam perancangan dan realisasi branch-line coupler diperlukan suatu kajian untuk mengetahui ketepatan pergeseran fasa yang diperoleh. Pada penelitian ini dilakukan, suatu analisa kerja branch-line coupler hasil dari suatu perancangan dan realisasi yang telah dilakukan untuk suatu deteksi fasa pada radar C-band dengan basis I/Q demodulator. Hasil penelitian menunjukkan bahwa nilai pergeseran yang mendekati 90 menyebabkan nilai fasa sinyal keluaran sebanding dengan fasa sinyal datang. Kata Kunci: I/Q Demodulator, Branch-Line Coupler, Penggeser Fasa

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22

Yu, Chun-Han, and Yi-Hsin Pang. "Dual-Band Unequal-Power Quadrature Branch-Line Coupler With Coupled Lines." IEEE Microwave and Wireless Components Letters 23, no. 1 (January 2013): 10–12. http://dx.doi.org/10.1109/lmwc.2012.2234087.

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23

Nosrati, Mehdi, and Salman Karbasi Valashani. "A novel compact branch-line coupler using four coupled transmission lines." Microwave and Optical Technology Letters 50, no. 6 (2008): 1712–14. http://dx.doi.org/10.1002/mop.23460.

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24

Abouelnaga, Tamer Gaber, and Ashraf Shawky Mohra. "Reconfigurable 3/6 dB Novel Branch Line Coupler." Open Journal of Antennas and Propagation 05, no. 01 (2017): 7–22. http://dx.doi.org/10.4236/ojapr.2017.51002.

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25

Kang, In Ho, and Xi Qiang Li. "Design of an extremely miniaturized branch-line coupler." Journal of the Korean Society of Marine Engineering 38, no. 8 (October 31, 2014): 995–99. http://dx.doi.org/10.5916/jkosme.2014.38.8.995.

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26

Kim, Jong-Sung. "Dual-Band Branch-Line Coupler Using Shorted Stubs." Journal of the Institute of Electronics Engineers of Korea 50, no. 2 (February 25, 2013): 54–59. http://dx.doi.org/10.5573/ieek.2013.50.2.054.

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27

Hyunchul Kim, Byungje Lee, and Myun-Joo Park. "Dual-Band Branch-Line Coupler With Port Extensions." IEEE Transactions on Microwave Theory and Techniques 58, no. 3 (March 2010): 651–55. http://dx.doi.org/10.1109/tmtt.2010.2040342.

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28

Wu, Qiuyi, Yimin Yang, Ying Wang, Xiaowei Shi, and Ming Yu. "Characteristic Impedance Control for Branch-Line Coupler Design." IEEE Microwave and Wireless Components Letters 28, no. 2 (February 2018): 123–25. http://dx.doi.org/10.1109/lmwc.2017.2779881.

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29

Zhu, Jun, Yonggang Zhou, and Jianhua Liu. "MINIATURIZATION OF BROADBAND 3-DB BRANCH-LINE COUPLER." Progress In Electromagnetics Research Letters 24 (2011): 169–76. http://dx.doi.org/10.2528/pierl11051706.

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30

Ji, Decheng, Bian Wu, Xiao Yan Ma, and Jian Zhong Chen. "A COMPACT DUAL-BAND PLANAR BRANCH-LINE COUPLER." Progress In Electromagnetics Research C 32 (2012): 43–52. http://dx.doi.org/10.2528/pierc12070901.

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31

Yuan, Shih-Yi, Miin-Shyue Shiau, Shry-Sann Liao, Pou-Tou Sun, and Chia-Tai Ho. "An extremely compact dual-band branch-line coupler." Microwave and Optical Technology Letters 49, no. 12 (2007): 3011–14. http://dx.doi.org/10.1002/mop.22895.

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32

Monti, Giuseppina, and Luciano Tarricone. "Dual-band artificial transmission lines branch-line coupler." International Journal of RF and Microwave Computer-Aided Engineering 18, no. 1 (2007): 53–62. http://dx.doi.org/10.1002/mmce.20266.

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33

Qamar, Zeeshan, Wing Shing Chan, and Ho Derek. "Wide bandwidth arbitrary phase difference branch line coupler." Microwave and Optical Technology Letters 59, no. 9 (June 27, 2017): 2241–45. http://dx.doi.org/10.1002/mop.30716.

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34

Salehi, Mohamad Reza, Leila Noori, and Ebrahim Abiri. "Novel tunable branch-line coupler for WLAN applications." Microwave and Optical Technology Letters 57, no. 5 (March 25, 2015): 1081–84. http://dx.doi.org/10.1002/mop.29025.

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35

Ali, Mohamad, S. K. A. Rahim, M. Z. M. Nor, and M. F. Jamlos. "Branch line coupler using hybrid T-model structure." Microwave and Optical Technology Letters 54, no. 1 (November 22, 2011): 237–40. http://dx.doi.org/10.1002/mop.26476.

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36

Wu, Yongle, Weinong Sun, Sai-Wing Leung, Yinliang Diao, and Kwok-Hung Chan. "A Compact Microstrip Wideband Arbitrary Branch-Line Coupler with Coupled-Line Impedance-Transforming Structures." Electromagnetics 33, no. 3 (April 2013): 256–70. http://dx.doi.org/10.1080/02726343.2013.769409.

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37

Jahanbakht, Mohammad, and Mohammad Tondro Aghmyoni. "Optimized Ultrawideband and Uniplanar Minkowski Fractal Branch Line Coupler." International Journal of Antennas and Propagation 2012 (2012): 1–4. http://dx.doi.org/10.1155/2012/695190.

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The non-Euclidean Minkowski fractal geometry is used in design, optimization, and fabrication of an ultrawideband (UWB) branch line coupler. Self-similarities of the fractal geometries make them act like an infinite length in a finite area. This property creates a smaller design with broader bandwidth. The designed 3 dB microstrip coupler has a single layer and uniplanar platform with quite easy fabrication process. This optimized 180° coupler also shows a perfect isolation and insertion loss over the UWB frequency range of 3.1–10.6 GHz.

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38

Bekasiewicz, Adrian. "Low-Cost Automated Design of Compact Branch-Line Couplers." Sensors 20, no. 12 (June 23, 2020): 3562. http://dx.doi.org/10.3390/s20123562.

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Branch-line couplers (BLCs) are important components of wireless communication systems. Conventional BLCs are often characterized by large footprints which make miniaturization an important pre-requisite for their application in modern devices. State-of-the-art approaches to design compact BLCs are largely based on the use of high-permittivity substrates and multi-layer topologies. Alternative methods involve replacement of transmission-line sections of the circuit, with their composite counterparts, referred to as compact cells (CCs). Due to the efficient use of available space, CC-based couplers are often characterized by small footprints. The design of compact BLCs is normally conducted based on engineering experience. The process is laborious and requires many adjustments of topology followed by manual or, semi-automatic tuning of design parameters. In this work, a framework for low-cost automated design of compact BLCs using pre-defined CCs is proposed. The low cost of the presented design technique is ensured using equivalent-circuit models, space mapping correction methods, and trust-region-based local optimization algorithms. The performance of the framework is demonstrated based on three examples, concerning the design of unequal-power split coupler, comparison of automatically generated compact BLCs, as well as rapid re-design of the coupler for different substrates. Furthermore, the approach has been benchmarked against the state-of-the-art methods for low-cost design of circuits.

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39

Wang, Yongqiang, Kaixue Ma, and Shouxian Mou. "A Compact Branch-Line Coupler Using Substrate Integrated Suspended Line Technology." IEEE Microwave and Wireless Components Letters 26, no. 2 (February 2016): 95–97. http://dx.doi.org/10.1109/lmwc.2016.2517158.

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40

Lee, Jung-Kyu, Dong-Jin Jung, and Kai Chang. "Dual-band branch-line coupler using double-sided parallel-strip line." Microwave and Optical Technology Letters 54, no. 8 (May 16, 2012): 1898–900. http://dx.doi.org/10.1002/mop.26952.

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41

Alhalabi, H., H. Issa, E. Pistono, D. Kaddour, F. Podevin, A. Baheti, S. Abouchahine, and P. Ferrari. "Miniaturized branch-line coupler based on slow-wave microstrip lines." International Journal of Microwave and Wireless Technologies 10, no. 10 (August 22, 2018): 1103–6. http://dx.doi.org/10.1017/s1759078718001204.

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AbstractThis paper presents a miniaturized 3-dB branch-line coupler based on slow-wave microstrip transmission lines. The miniaturized coupler operating at 2.45 GHz is designed and implemented on a double-layer printed circuit board substrate with blind metallic vias embedded in the lower substrate layer providing the slow-wave effect. Based on this concept, a 43% size miniaturization is achieved as compared with a classical microstrip branch-line coupler prototype. The measured S parameters present a return loss of 25.5 dB and an average insertion loss equal to 0.05 dB at the operating frequency.

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42

Huang, Wen, Jia Li, Ping Li, and Xi Guo. "Compact Microwave Components with Harmonic Suppression Based on Artificial Transmission Lines." International Journal of Antennas and Propagation 2019 (May 2, 2019): 1–16. http://dx.doi.org/10.1155/2019/4923964.

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In this paper, compact microwave components, including a Wilkinson power divider and a 3 dB branch-line coupler based on artificial transmission lines (ATLs) with harmonic suppression, are presented. A section ATL is consisted of microstrip stepped impedance transmission lines and a microstrip interdigital capacitor. To achieve a compact size, the stepped impedance transmission lines are folded into a right-angled triangle shape. For the ATL, the interdigital capacitor is used to suppress harmonics. By employing two sections of 70.7 Ω ATLs with a right-angled triangle shape to replace conventional transmission lines, the proposed power divider working at 0.9 GHz achieves a size miniaturization with the 58.8% area of a conventional case. In addition, the power divider has good harmonic suppression performance. In the design of a branch-line coupler, two pairs of ATLs with 50 Ω and 35.4 Ω are utilized. For 50 Ω ATLs, the ATLs are designed to a right-angled triangle shape. Meanwhile, to obtain a more compact size, these 35.4 Ω ATLs are modified to an isosceles trapezoid shape. The proposed branch-line coupler operating at 0.9 GHz accounts for merely 33.4% of a coupler adopting conventional microstrip transmission lines. Moreover, the harmonics of a branch-line coupler are suppressed effectively as well. Finally, measured results of the proposed Wilkinson power divider and branch-line coupler display good performance and agree with their simulated results well.

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43

Wong, Yuk Shing, Shao Yong Zheng, and Wing Shing Chan. "MULTIFOLDED BANDWIDTH BRANCH LINE COUPLER WITH FILTERING CHARACTERISTIC USING COUPLED PORT FEEDING." Progress In Electromagnetics Research 118 (2011): 17–35. http://dx.doi.org/10.2528/pier11041401.

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44

Katakam, Sri, Han Ren, Jin Shao, Mi Zhou, Bayaner Arigong, Jun Ding, and Hualiang Zhang. "A dual-band branch line coupler based on Pi-shaped coupled lines." Microwave and Optical Technology Letters 57, no. 2 (December 18, 2014): 501–4. http://dx.doi.org/10.1002/mop.28879.

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45

Barnadi, Yudi, Yanyan Agustian, and Fuad Hasan. "Improvement Branch Line Coupler Isolation in S Band Frequency." International Journal of Engineering & Technology 7, no. 4.33 (December 9, 2018): 219. http://dx.doi.org/10.14419/ijet.v7i4.33.23563.

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In this paper, the research was conducted to investigate the effects of optimization dimension to the isolation value of the Branch line coupler. The isolation is very important because it affects to the performance of the duplexer. The smaller value the better isolation performance of the duplexer. This research is carried out by modifying the length and width of the channels of the impedance of the Coupler. In this experiment, Branch-Line coupler is designed in the form of microstrip and fabricated using the FR-4 substrate that has a dielectric constant of 4.6, thickness of 1.3 mm, and 3 GHz operating frequency. To get the optimization value of the isolation characteristic, impedance channel must be modified, which are the length and width of the arms series (Z0 = 50 Ω), the length and width of the arms series (Z0 = 35.35 Ω), and the length and width of the arms shunt (Z0 = 50 Ω). The optimized result of the isolation is -67,786 B

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46

Ramesh, M., D. Packiaraj, and A. T. Kalghatgi. "A Compact Branch Line Coupler Using Defected Ground Structure." Journal of Electromagnetic Waves and Applications 22, no. 2-3 (January 2008): 267–76. http://dx.doi.org/10.1163/156939308784160659.

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47

Wang, J., J. Ni, S. Zhao, and Y. X. Guo. "Compact Microstrip Ring Branch-Line Coupler with Harmonic Suppression." Journal of Electromagnetic Waves and Applications 23, no. 16 (January 1, 2009): 2119–26. http://dx.doi.org/10.1163/156939309790109216.

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48

Sakagami, I., M. Haga, and T. Munehiro. "Reduced branch-line coupler using eight two-step stubs." IEE Proceedings - Microwaves, Antennas and Propagation 146, no. 6 (1999): 455. http://dx.doi.org/10.1049/ip-map:19990785.

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49

Vanbésien, O., and D. Lippens. "Theoretical analysis of a branch line quantum directional coupler." Applied Physics Letters 65, no. 19 (November 7, 1994): 2439–41. http://dx.doi.org/10.1063/1.112700.

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50

Kae-Oh Sun, Sung-Jin Ho, Chih-Chuan Yen, and D. van der Weide. "A compact branch-line coupler using discontinuous microstrip lines." IEEE Microwave and Wireless Components Letters 15, no. 8 (August 2005): 519–20. http://dx.doi.org/10.1109/lmwc.2005.852789.

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