volume | PIER Journals

Abstract

This paper presents an innovative high gain multiple-input-multiple-output antenna featuring a compact circular shape, enhanced by strategically positioned slots, slits, and defected grounds created by etching multiple iterations of circle inserted with triangle shape. The investigation thoroughly explores the various traits and properties exhibited by the antenna. The antenna design harmoniously incorporates two radiating elements shaped in circles, positioned 16 mm apart from their centers, and has been physically constructed using an FR4 substrate. Enhancing the antenna's bandwidth and gain requires the implementation of slots with fractal patterns on the ground with a precise edge-to-edge separation of 2.5 mm. The placement of the antenna elements at a 16 mm distance guarantees an isolation level exceeding 15 dB consistently throughout the entire wideband frequency range. The dimensions of the compact MIMO antenna are tailored to be 1.12λ × 1.8λ × 0.091λ (20 × 32 × 1.62 mm³). In this study, the circular patch MIMO antenna with a fractal DGS resonates precisely at 16.903 GHz. It showcases an impressive impedance bandwidth spanning 2.027 GHz, ranging from 15.946 GHz to 17.973 GHz. It exhibits a reflection coefficient of -43.82 dB and achieves an observed gain of 6.25 dBi. The observed results include a minimal envelope correlation coefficient (<0.025) and a substantial Diversity Gain (>9.89). The measured results mirror the simulated outcomes, affirming the effectiveness of the wideband, high-gain antenna design. Its bandwidth and gain are well-suited for Satellite Communications particularly in downlink applications, enabling faster data transmission rates.

1. Garg, Ramesh, Microstrip Antenna Design Handbook, Artech House, Norwood, 2001.

2. Naik, Ketavath Kumar and Pasumarthi Amala Vijaya Sri, "Design of hexadecagon circular patch antenna with DGS at Ku band for satellite communications," Progress In Electromagnetics Research M, Vol. 63, 163-173, 2018. Google Scholar

3. Islam, Mohammad Tariqul, Mohammed Nazmus Shakib, and Norbahiah Misran, "Broadband E-H shaped microstrip patch antenna for wireless systems," Progress In Electromagnetics Research, Vol. 98, 163-173, 2009. Google Scholar

4. Kumar Naik, Ketavath and Pasumarthi Amala Vijaya Sri, "Design of concentric circular ring patch with DGS for dual-band at satellite communication and radar applications," Wireless Personal Communications, Vol. 98, 2993-3001, 2018. Google Scholar

5. Elftouh, Hanae, Naima Amar Touhami, Mohamed Aghoutane, Safae El Amrani, Antonio Tazón, and Mohamed Boussouis, "Miniaturized microstrip patch antenna with defected ground structure," Progress In Electromagnetics Research C, Vol. 55, 25-33, 2014.
doi:10.2528/PIERC14092302 Google Scholar

6. Werner, Douglas H. and Suman Ganguly, "An overview of fractal antenna engineering research," IEEE Antennas and Propagation Magazine, Vol. 45, No. 1, 38-57, 2003. Google Scholar

7. Naik, Ketavath Kumar, Gopi Dattatreya, Ramadugu P. S. Chaitanya, Ravikumar Palla, and Sriram Sandhya Rani, "Enhancement of gain with corrugated Y‐shaped patch antenna for triple‐band applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 29, No. 3, e21624, 2019. Google Scholar

8. Ullah, Shahid, Cunjun Ruan, Muhammad Shahzad Sadiq, Tanveer Ul Haq, Ayesha Kosar Fahad, and Wenlong He, "Super wide band, defected ground structure (DGS), and stepped meander line antenna for WLAN/ISM/WiMAX/UWB and other wireless communication applications," Sensors, Vol. 20, No. 6, 1735, 2020.
doi:10.3390/s20061735 Google Scholar

9. Wei, F., L. Chen, X.-W. Shi, and C.-J. Gao, "UWB bandpass filter with one tunable notch-band based on DGS," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 5-6, 673-680, 2012. Google Scholar

10. Sharma, Preeti, Rakesh N. Tiwari, Prabhakar Singh, Pradeep Kumar, and Binod K. Kanaujia, "MIMO antennas: Design approaches, techniques and applications," Sensors, Vol. 22, No. 20, 7813, 2022.
doi:10.3390/s22207813 Google Scholar

11. Bayatmaku, Nima, Parisa Lotfi, Mohammadnaghi Azarmanesh, and Saber Soltani, "Design of simple multiband patch antenna for mobile communication applications using new E-shape fractal," IEEE Antennas and Wireless Propagation Letters, Vol. 10, 873-875, 2011. Google Scholar

12. Peng, He, Ruixing Zhi, Qichao Yang, Jing Cai, Yi Wan, and Gui Liu, "Design of a MIMO antenna with high gain and enhanced isolation for WLAN applications," Electronics, Vol. 10, No. 14, 1659, 2021. Google Scholar

13. Ren, Jian, Wei Hu, Yingzeng Yin, and Rong Fan, "Compact printed MIMO antenna for UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1517-1520, 2014. Google Scholar

14. Babu, K. Vasu, Pasumarthi Srinivasa Rao, B. Chandrababu Naik, and B. Ravi Kumar, "Compact dual-band design and analysis of half-circular U-shape MIMO radiator for wireless applications," Microsystem Technologies, Vol. 29, No. 4, 501-514, 2023. Google Scholar

15. Mia, Md. Masum, Md. Shaharul Islam, Md. Firoz Ahmed, Md. Hasnat Kabir, Md. Ashraful Islamand, and Md. Matiqul Islam, "Design of aminiature rectangular patch antenna for KU band applications," The International Journal of Ambient Systems and Applications, Vol. 10, No. 4, 01-07, 2022.
doi:10.5121/ijasa.2022.10401 Google Scholar

16. Ghosh, Bratin, S. K. Moinul Haque, and Debasis Mitra, "Miniaturization of slot antennas using slit and strip loading," IEEE Transactions on Antennas and Propagation, Vol. 59, No. 10, 3922-3927, 2011. Google Scholar

17. Dastranj, Aliakbar, Ali Imani, and Mohammad Naser-Moghaddasi, "Printed wide-slot antenna for wideband applications," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 10, 3097-3102, 2008. Google Scholar

18. Qin, Pei-Yuan, Feng Wei, and Y. Jay Guo, "A wideband-to-narrowband tunable antenna using a reconfigurable filter," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 5, 2282-2285, May 2015. Google Scholar

19. Naik, Ketavath Kumar, "Improvement of wider bandwidth using dual E–shaped antenna for wireless communications in 5G applications," Analog Integrated Circuits and Signal Processing, Vol. 109, No. 1, 93-101, 2021. Google Scholar

20. Ketavath, Kumar Naik, "Enhancement of gain with coplanar concentric ring patch antenna," Wireless Personal Communications, Vol. 108, No. 3, 1447-1457, 2019. Google Scholar

21. Asci, Yavuz, "Wideband and stable-gain cavity-backed slot antenna with inner cavity walls and baffle for X-and Ku-band applications," IEEE Transactions on Antennas and Propagation, Vol. 71, No. 4, 3689-3694, 2023. Google Scholar

22. Bilgic, M. M. and K. Yegin, "Wideband offset slot-coupled patch antenna array for X/Ku-band multimode radars," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 157-160, 2014. Google Scholar

23. Liu, Li, S. W. Cheung, and T. I. Yuk, "Compact MIMO antenna for portable devices in UWB applications," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 8, 4257-4264, 2013. Google Scholar

24. Saxena, S., B. K. Kanaujia, S. Dwari, S. Kumar, and R. Tiwari, "MIMO antenna with built‐in circular shaped isolator for sub‐6 GHz 5G applications," Electronics Letters, Vol. 54, No. 8, 478-480, 2018. Google Scholar

25. Addepalli, Tathababu and V. R. Anitha, "A very compact and closely spaced circular shaped UWB MIMO antenna with improved isolation," AEU --- International Journal of Electronics and Communications, Vol. 114, 153016, 2020. Google Scholar

Dr. Manjula Sanugomula

Prof. Ketavath Kumar Naik