volume | PIER Journals

Abstract

A low-profile coplanar waveguide fed four-band compact antenna for 5G and WLAN applications is presented in this letter. Multiple bands are generated using a cactusshaped patch, which consists of several inverted L-shaped slots and branches. The proposed antenna provides 150 MHz (2.10 GHz-2.25 GHz), 400 MHz (3.25 GHz-3.65 GHz), 1022 MHz (4.42 GHz-5.44 GHz), 1400 MHz (5.60 GHz-7.00 GHz) bandwidths of 10 dB return loss, corresponding to the target N1/N78/N79 5G bands and 5.8 GHz WLAN band, respectively. Moreover, the proposed antenna has a low profile of 21 mm × 29 mm × 1.6 mm, while maintaining tolerable gain in these operation bands. In addition, monopole-like radiation patterns are obtained, which is suitable for wireless communication. In order to verify this design, a prototype has been fabricated and measured. The measured results show satisfactory agreement with the simulated ones.

1. Huang, H., Y. Liu, S. Zhang, and S. Gong, "Multiband metamaterial-loaded monopole antenna for WLAN/WiMAX applications," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 662-665, Feb. 2015.
doi:10.1109/LAWP.2014.2376969

2. Gautam, K., L. Kumar, B. K. Kanaujia, and K. Rambabu, "Design of compact F-shaped slot triple-band antenna for WLAN/WiMAX applications," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 3, 1101-1105, 2016.
doi:10.1109/TAP.2015.2513099

3. Chen, H., X. Yang, Y. Z. Yin, S. T. Fan, and J. J. Wu, "Triband planar monopole antenna with compact radiator for WLAN/WiMAX applications," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 1440-1443, 2013.
doi:10.1109/LAWP.2013.2287312

4. Zhou, C., G. Wang, J. Liang, Y. Wang, and B. Zong, "Broadband antenna employing simplified MTLs for WLAN/WiMAX applications," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 595-598, Apr. 2014.
doi:10.1109/LAWP.2014.2313128

5. Li, X., X. Shi, W. Hu, P. Fei, and J. Yu, "Compact triband ACS-fed monopole antenna employing open-ended slots for wireless communication," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 388-391, 2013.
doi:10.1109/LAWP.2013.2252414

6. Hu, W., Y. Yin, X. Yang, and P. Fei, "Compact multiresonator-loaded planar antenna for multiband operation," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 5, 2838-2841, May 2013.
doi:10.1109/TAP.2013.2242819

7. Moosazadeh, M. and S. Kharkovsky, "Compact and small planar monopole antenna with symmetrical L- and U-shaped slots for WLAN/WiMAX applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 388-391, 2014.
doi:10.1109/LAWP.2014.2306962

8. Wong, K., H. Chang, C. Wang, and S. Wang, "Very-low-profile grounded coplanar waveguide-fed dual-band WLAN slot antenna for on-body antenna application," IEEE Antennas and Wireless Propagation Letters, Vol. 19, No. 1, 213-217, Jan. 2020.
doi:10.1109/LAWP.2019.2958961

9. Nie, M., X. Yang, G. Tan, and B. Han, "A compact 2.45-GHz broadband rectenna using grounded coplanar waveguide," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 986-989, Dec. 2015.
doi:10.1109/LAWP.2015.2388789

10. Lee, C., S. Su, S. Chen, and C. Fu, "Low-cost, direct-fed slot antenna built in metal cover of notebook computer for 2.4-/5.2-/5.8-GHz WLAN operation," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 5, 2677-2682, May 2017.
doi:10.1109/TAP.2017.2679070

11. Su, S., C. Lee, and S. Chen, "Compact, printed, tri-band loop antenna with capacitively-driven feed and end-loaded inductor for notebook computer applications," IEEE Access, Vol. 6, 6692-6699, 2018.
doi:10.1109/ACCESS.2018.2794606

12. Su, S., C. Lee, and S. Chen, "Very-low-profile, triband, two-antenna system for WLAN notebook computers," IEEE Antennas and Wireless Propagation Letters, Vol. 17, No. 9, 1626-1629, Sept. 2018.
doi:10.1109/LAWP.2018.2858849

13. Hu, W., et al., "Dual-band ten-element MIMO array based on dual-mode IFAs for 5G terminal applications," IEEE Access, Vol. 7, 178476-178485, 2019.
doi:10.1109/ACCESS.2019.2958745

14. Ban, Y., C. Li, C. Sim, G. Wu, and K. Wong, "4G/5G multiple antennas for future multi-mode smartphone applications," IEEE Access, Vol. 4, 2981-2988, 2016.
doi:10.1109/ACCESS.2016.2582786

15. Ramachandran, A., S. Mathew, V. Rajan, and V. Kesavath, "A compact triband quad-element MIMO antenna using SRR ring for high isolation," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 1409-1412, 2017.
doi:10.1109/LAWP.2016.2640305

16. Liu, R., X. An, H. Zheng, M. Wang, Z. Gao, and E. Li, "Neutralization line decoupling tri-band multiple-input multiple-output antenna design," IEEE Access, Vol. 8, 27018-27026, 2020.
doi:10.1109/ACCESS.2020.2971038

17. Nandi, S. and A. Mohan, "CRLH unit cell loaded triband compact MIMO antenna for WLAN/WiMAX applications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 1816-1819, 2017.

18. Tan, X., W. Wang, Y. Wu, Y. Liu, and A. A. Kishk, "Enhancing isolation in dual-band meanderline multiple antenna by employing split EBG structure," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 4, 2769-2774, Apr. 2019.
doi:10.1109/TAP.2019.2897489

19. Nikolaou, S., G. E. Ponchak, M. M. Tentzeris, and J. Papapolymerou, "Compact cactus-shaped ultra wide-band (UWB) monopole on organic substrate," 2007 IEEE Antennas and Propagation Society International Symposium, 4637-4640, 2007.
doi:10.1109/APS.2007.4396577

20. Eveleigh, E., A. S. Beaverstone, and N. K. Nikolova, "Printed Cactus monopole antenna with enhanced impedance bandwidth," 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 1085-1086, 2019.
doi:10.1109/APUSNCURSINRSM.2019.8888729

21. Zachou, V., C. G. Christodoulou, M. T. Chryssomallis, and D. Anagnostou, "Reconfigurable printed cactus antenna," 2006 IEEE Antennas and Propagation Society International Symposium, 201-204, 2006.
doi:10.1109/APS.2006.1710489

22. Saephan, C., H. Khaleel, B. Valdovinos, A. Isaac, and A. Bihnam, "Tri-band cactus shaped printed monopole," 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 1704-1705, 2014.
doi:10.1109/APS.2014.6905178

23. Morabito, A. F., A. R. Lagana, and T. Isernia, "Optimizing power transmission in given target areas in the presence of protection requirements," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 44-47, 2015.
doi:10.1109/LAWP.2014.2354514

Dr. Juan Zhang

Prof. Xiaoming Liu

Dr. Chen Wang

Dr. Lu Gan

Dr. Ye Wang

Dr. Lijun Sun