volume | PIER Journals

Abstract

A distinctive low-profile 2x2 MIMO antenna system for Wi-Fi 7 applications is presented in this paper that is compact, easily manufactured and with excellent performance. Because of its compact size and good RF performance, the design can be placed in hidden locations for various applications such as the automotive field in the front side mirrors or front dashboard, and consumer products in laptops and internet wireless routers. The proposed design can cover the entire tri-bands of Wi-Fi 7 (2400-2495 MHz, 5150-5895 MHz, 5945-7125 MHz) using a loaded low-profile Planar Inverted-F Antenna (PIFA) with distinct dimensions and slots across its geometry. The element design and the MIMO system is simulated and a properly made prototype was fabricated to present the results in terms of reflection coefficients, current distribution, combined radiation patterns, passive isolation, ports efficiencies, and Envelope Correlation Coefficient (ECC). The design shows relatively good RF properties across the entire three bands, hence making it an attractive solution to be used for Wi-Fi 7 technology to satisfy the needs of larger omnidirectional coverage area, wider channel bandwidth, and better transmission rates with low interference.

1. Ghouz, Hussein Hamed, "Novel compact and dual-broadband microstrip MIMO antennas for wireless applications," Progress In Electromagnetics Research B, Vol. 63, 107-121, 2015.

2. Yacoub, Ahmad M., Mohamed O. Khalifa, and Daniel N. Aloi, "Wide band raised printed monopole for automotive 5G wireless communications," IEEE Open Journal of Antennas and Propagation, Vol. 3, 502-510, 2022.
doi:10.1109/OJAP.2022.3170799

3. Yacoub, Ahmad, Mohamed Khalifa, and Daniel N Aloi, "Wide bandwidth low profile PIFA antenna for vehicular sub-6 GHz 5G and v2x wireless systems," Progress In Electromagnetics Research C, Vol. 109, 257-273, 2021.

4. Yacoub, Ahmad, Mohamed Khalifa, and Daniel N Aloi, "Compact 2 x 2 automotive MIMO antenna systems for sub-6 GHz 5G and v2x communications," Progress In Electromagnetics Research B, Vol. 93, 23-46, 2021.
doi:10.2528/PIERB21031606

5. Sim, Chow-Yen-Desmond, Jayshri Kulkarni, Shr-Hua Wang, Shi-Ying Zheng, Zhi-Hao Lin, and Shu-Chuan Chen, "Low-profile laptop antenna design for Wi-Fi 6E band," IEEE Antennas and Wireless Propagation Letters, Vol. 22, No. 1, 79-83, Jan. 2023.
doi:10.1109/LAWP.2022.3202697

6., FCC, "Report and order and further notice of proposed rulemaking; In the matter of unlicensed use of the 6 GHz band (ET Docket No. 18–295); Expanding flexible use in mid-band spectrum between 3.7 and 24 GHz (GN Docket No. 17–183),", Apr. 2020.
doi:10.1109/LAWP.2022.3202697

7. Korolev, Nikolay, Ilya Levitsky, and Evgeny Khorov, "Analytical model of multi-link operation in saturated heterogeneous Wi-Fi 7 networks," IEEE Wireless Communications Letters, Vol. 11, No. 12, 2546-2549, Dec. 2022.
doi:10.1109/LWC.2022.3207946

8. Khorov, Evgeny, Ilya Levitsky, and Ian F. Akyildiz, "Current status and directions of IEEE 802.11be, the future Wi-Fi 7," IEEE Access, Vol. 8, 88664-88688, 2020.
doi:10.1109/ACCESS.2020.2993448

9. Yacoub, Ahmad and Daniel N. Aloi, "Low-profile automotive antenna systems for MIMO 5G and L1/L5 GNSS communications," 2022 16th European Conference on Antennas and Propagation (EUCAP), Madrid, Spain, Mar. 27-apr. 01 2022.

10. Deng, Cailian, Xuming Fang, Xiao Han, Xianbin Wang, Li Yan, Rong He, Yan Long, and Yuchen Guo, "IEEE 802.11be Wi-Fi 7: New challenges and opportunities," IEEE Communications Surveys and Tutorials, Vol. 22, No. 4, 2136-2166, 2020.
doi:10.1109/COMST.2020.3012715

11. See, Chan Hwang, Raed A. Abd-Alhameed, Zuhairiah Z. Abidin, Neil J. McEwan, and Peter S. Excell, "Wideband printed MIMO/diversity monopole antenna for WiFi/WIMAX applications," IEEE Transactions on Antennas and Propagation, Vol. 60, No. 4, 2028-2035, Apr. 2012.
doi:10.1109/TAP.2012.2186247

12. Han, Tuan-Yung, Wei-Tzu Hsieh, Kai-Hong Jheng, Shih-Hua Wang, and Chow-Yen-Desmond Sim, "Design of laptop antenna for WLAN and Wi-Fi 6E applications," 2021 International Symposium on Antennas and Propagation (ISAP), Taipei, Taiwan, Oct. 19-22 2021.

13. Jhang, Wei-Chiang and Jwo-Shiun Sun, "Small antenna design of triple band for WiFi 6E and WLAN applications in the narrow border laptop computer," International Journal of Antennas and Propagation, Vol. 2021, Jul. 9 2021.
doi:10.1155/2021/7334206

14. Lee, Cheng-Tse, Che-Chi Wan, and Saou-Wen Su, "Multi-laptop-antenna designs for 2.4/5/6 GHz WLAN and 5G NR77/78/79 operation," 2020 International Symposium on Antennas and Propagation (ISAP), 421-422, Electr Network, Jan. 25-28, Jan. 25-28 2021.

15. Su, Saou-Wen and Che-Chi Wan, "Asymmetrical, self-isolated laptop antenna in the 2.4/5/6 GHz Wi-Fi 6E bands," 2021 International Symposium on Antennas and Propagation (ISAP), Taipei, Taiwan, Oct. 19-22 2021.

16. Li, Abiao, Botao Feng, and Xiao Ding, "A wideband omnidirectional MIMO antenna for WiFi-6E applications," 2022 IEEE 5th International Conference on Electronic Information and Communication Technology (ICEICT), 834-836, 2022.

17. Cai, Chun-An, Kuo-Yu Kai, and Wen-Jiao Liao, "A WLAN/WiFi-6E MIMO antenna design for handset devices," 2021 International Symposium on Antennas and Propagation (ISAP), Taipei, Taiwan, Oct. 19-22 2021.

18. Chang, Chin-Cheng, Yi-Fang Lin, Minh-Tan Nguyen, Yi-Xiao Liu, Hong-Twu Chen, and Hua-Ming Chen, "Design of MIMO antennas for WiFi/5G small cell applications," 2021 International Symposium on Antennas and Propagation (ISAP), Taipei, Taiwan, Oct. 19-22 2021.

19. Chattha, Hassan Tariq, Yi Huang, Xu Zhu, and Yang Lu, "An empirical equation for predicting the resonant frequency of planar inverted-F antennas," IEEE Antennas and Wireless Propagation Letters, Vol. 8, 856-860, 2009.
doi:10.1109/LAWP.2009.2027822

20. Sharawi, Mohammad S., Abdelmoniem T. Hassan, and Muhammad U. Khan, "Correlation coefficient calculations for MIMO antenna systems: A comparative study," International Journal of Microwave and Wireless Technologies, Vol. 9, No. 10, 1991-2004, Dec. 2017.
doi:10.1017/S1759078717000903

21. Elshirkasi, Ahmed Mohamed, Azremi Abdullah Al-Hadi, Mohd Fais Mansor, Rizwan Khan, and Ping Jack Soh, "Envelope correlation coefficient of a two-port MIMO terminal antenna under uniform and gaussian angular power spectrum with user's hand effect," Progress In Electromagnetics Research C, Vol. 92, 123-136, 2019.

22. Beegum, Sainudeen Femina and Sanjeev Kumar Mishra, "Compact WLAN band-notched printed ultrawideband MIMO antenna with polarization diversity," Progress In Electromagnetics Research C, Vol. 61, 149-159, 2016.

23. Yacoub, Ahmad and Daniel Aloi, "Low-profile MIMO antenna system for vehicular Wi-Fi 7 wireless communications," 2023 Xxxvth General Assembly and Scientific Symposium of The International Union of Radio Science (URSI GASS), 1-4, 2023.

Dr. Ahmad Yacoub

Dr. Daniel N. Aloi