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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2019-11-27
Conjoined, 2.4/5-GHz WLAN Two-Monopole System Decoupled Using Mode-Controlled Capacitor for Notebook Computers
By
Che-Chi Wan,

    Dr. Che-Chi Wan

    Antenna Design Department

    Advanced EM & Wireless Communication R&D Center

    Taiwan

    Homepage

Saou-Wen Su

    Dr. Saou-Wen Su

    Department of Computer and Communication Engineering

    National Kaohsiung University of Science and Technology

    Taiwan

    Homepage

Progress In Electromagnetics Research M, Vol. 87, 1-10, 2019
doi:10.2528/PIERM19083006 | Google Scholar

Abstract
A low-profile, decoupled two-monopole system with its two parasitic grounded strips conjoined, forming a very compact structure is demonstrated. Each of the two identical antennas comprises a driven coupling strip and a parasitic grounded strip, operating respectively in the 2.4 GHz (2400-2484 MHz) and 5 GHz (5150-5825 MHz) wireless local area network (WLAN) bands. The two parasitic strips are further joined together, becoming a central, grounded T monopole. By loading a capacitor between the T monopole and the antenna ground, the mutual coupling in the 2.4 GHz band can be reduced by about 12 dB. The capacitor in this design is used to control Ant2 monopole mode to cancel out opposite-phased currents of the dipole mode on the T monopole when Ant1 is excited, such that isolation enhancement can be attained. The proposed two-monopole system occupies a compact size of 5 mm × 40 mm (about 0.04λ × 0.32λ at 2.4 GHz) and is favorable for applications in the narrow-bezel notebook computers owing to its low profile of 5 mm.
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Citation
Che-Chi Wan, and Saou-Wen Su, "Conjoined, 2.4/5-GHz WLAN Two-Monopole System Decoupled Using Mode-Controlled Capacitor for Notebook Computers," Progress In Electromagnetics Research M, Vol. 87, 1-10, 2019.
doi:10.2528/PIERM19083006
References

1., RangBoost technology, ASUS, https://www.asus.com/Laptops/ ROG-Strix-Hero-II/.
doi:10.1109/COMST.2018.2871099

2. Khorov, E., A. Kiryanov, A. Lyakhov, and G. Bianchi, "A tutorial on IEEE 802.11ax high efficiency WLANs," IEEE Comm. Surveys & Tutorials, Vol. 21, 197-216, 2019.
doi:10.1109/TAP.2008.2005460        Google Scholar

3. Mak, A. C. K., C. R. Rowell, and R. D. Murch, "Isolation enhancement between two closely packed antennas," IEEE Trans. Antennas Propagat., Vol. 56, 3411-3419, 2008.
doi:10.1002/mop.24831        Google Scholar

4. Kang, T. W. and K. L. Wong, "Isolation improvement of 2.4/5.2/5.8 GHz WLAN internal laptop computer antennas using dual-band strip resonator as a wavetrap," Microw. Opt. Technol. Lett., Vol. 52, 58-64, 2010.
doi:10.1109/LAWP.2014.2345776        Google Scholar

5. Guo, L., Y.Wang, Z. Du, Y. Gao, and D. Shi, "A compact uniplanar printed dual-antenna operating at the 2.4/5.2/5.8 GHz WLAN bands for laptop computers," IEEE Antennas Wireless Propagat. Lett., Vol. 13, 229-232, 2014.
doi:10.1109/LAWP.2015.2394473        Google Scholar

6. Liu, Y., Y. Wang, and Z. Du, "A broadband dual-antenna system operating at the WLAN/WiMax bands for laptop computers," IEEE Antennas Wireless Propagat. Lett., Vol. 14, 1060-1063, 2015.
doi:10.1109/LAWP.2017.2713986        Google Scholar

7. Deng, J. Y., J. Y. Li, L. Zhao, and L. X. Guo, "A dual-band inverted-F MIMO antenna with enhanced isolation for WLAN applications," IEEE Antennas Wireless Propagt. Lett., Vol. 16, 2270-2273, 2017.
doi:10.1002/mop.31858        Google Scholar

8. Su, S. W. and Y. W. Hsiao, "Small-sized, decoupled two-monopole antenna system using the same monopole as decoupling structure," Microw. Opt. Technol. Lett., Vol. 61, 2049-2055, 2019.
doi:10.1109/TAP.2019.2925286        Google Scholar

9. Su, S.-W., C. T. Lee, and Y. W. Hsiao, "Compact two-inverted-F-antenna system with highly integrated π-shaped decoupling structure," IEEE Trans. Antennas Propagat., Vol. 67, 6182-6186, 2019.
doi:10.1109/LAWP.2018.2858849        Google Scholar

10. Su, S.-W., C. T. Lee, and S. C. Chen, "Very-low-profile, triband, two-antenna system for WLAN notebook computers," IEEE Antennas Wireless Propagat. Lett., Vol. 17, 1626-1629, 2018.
doi:10.1109/TAP.2018.2790041        Google Scholar

11. Sui, J. and K. L. Wu, "Self-curing decoupling technique for two inverted-F antennas with capacitive loads," IEEE Trans. Antennas Propagat., Vol. 68, 1093-1101, 2018.
doi:10.1002/mop.31505        Google Scholar

12. Wong, K. L., B. W. Lin, and S. E. Lin, "High-isolation conjoined loop multi-input multi-output antennas for the fifth-generation tablet device," Microw. Opt. Technol. Lett., Vol. 61, 111-119, 2019.
doi:10.1002/mop.31156        Google Scholar

13. Su, S.-W., "Very-low-profile, 2.4/5-GHz WLAN monopole antenna for large screen-to-body-ratio notebook computers," Microw. Opt. Technol. Lett., Vol. 60, 1313-1318, 2018.
doi:10.1109/ACCESS.2018.2794606        Google Scholar

14. Su, S.-W., C. T. Lee, and S. C. Chen, "Compact, printed, tri-band loop antenna with capacitivelydriven feed and end-loaded inductor for notebook computers," IEEE Access, Vol. 6, 6692-6699, 2018.
doi:10.2528/PIERM18061904        Google Scholar

15. Su, S.-W., "Capacitor-inductor-loaded, small-sized loop antenna for WLAN notebook computers," Progress In Electromagnetics Research M, Vol. 71, 179-188, 2018.
doi:10.2528/PIERL18121403        Google Scholar

16. Su, S.-W., "Very-low-profile, small-sized, printed monopole antenna for WLAN notebook computer applications," Progress In Electromagnetics Research Letters, Vol. 82, 51-57, 2019.        Google Scholar

17., ANSYS HFSS, ANSYS Inc., https://www.ansys.com/Products/Electronics/ANSYS-HFSS.
doi:10.1109/TAP.2019.2902656

18. "Novel and efficient parasitic decoupling network for closely coupled antennas," IEEE Trans. Antennas Propagat., Vol. 67, 3574-3585, 2019.        Google Scholar

19., SG 64, SATIMO, http://www.mvg-world.com/en/products/field product family/antennameasurement- 2/sg-64.

20. Volakis, J. L., Antenna Engineering Handbook, 4th Edition, Chapter 6, 16–19, McGraw-Hill, New York, 2007.

21. Balanis, C. A., Antenna Theory: Analysis and Design, 3rd Edition, Chapter 2, Wiley, Hoboken, NJ, 2012.

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