volume | PIER Journals

Abstract

The design, fabrication, and measurement of a 70 mm × 60 mm × 1.6 mm high-bandwidth Cantor fractal slotted defected ground surface (DGS) antenna for the microwave C-band (4-8 GHz) are presented in this study. This multiband antenna has the best performance ever because it combines a Cantor-inverted Cantor fractal slot with a microstrip quarter-wave transformer feeding network. With simulated operating bands spanning 3.37-3.48 GHz, 4.22-5.67 GHz, and 6.74-8.25 GHz, this antenna demonstrates exceptional simulated impedance bandwidths of 110 MHz, 1.43 GHz, and 1.51 GHz with simulated reflection coefficients of -27.22 dB, -28.23 dB, and -14.71 dB at resonance frequencies of 3.44 GHz, 5.03 GHz, and 7.17 GHz, respectively. Furthermore, the antenna exhibits simulated high gains of 5.6 dB, at 5.03 GHz resonating frequency. The introduction of a split ring resonator (SRR) at the ground surface unlocks the complete simulated bandwidth of 4.13-8.14 GHz and boosts the simulated gain to 6.1 dB. The design of this SRR at 5.03 GHz shifts one band from 3.44 GHz to 2.97 GHz with simulated bandwidth of 60 MHz. The VSWR value of this design is very close to 1. Consequently, its good impedance matching enhances the antenna's wideband performance. This is beneficial because patch antennas usually have a limited bandwidth. In addition, the antenna simulation displays an exactly symmetrical radiation pattern with current densities of 268 A/m and 155 A/m at 5.03 GHz with and without SRR, respectively.

1. Mandelbrot, B., Fractals: Form, Chance and Dimension, W H Freeman and Co, ISBN 0-7167-0473-0, 1977.

2. Azim, Rezaul and Mohammad Tariqul Islam, "Compact planar UWB antenna with band notch characteristics for WLAN and DSRC," Progress In Electromagnetics Research, Vol. 133, 391-406, 2013.

3. Syed, Avez and Rabah W. Aldhaheri, "A very compact and low profile UWB planar antenna with WLAN band rejection," The Scientific World Journal, Vol. 2016, No. 1, 3560938, 2016.

4. Gianvittorio, J. P. and Y. Rahmat-Samii, "Fractal antennas: A novel antenna miniaturization technique, and applications," IEEE Antennas and Propagation Magazine, Vol. 44, No. 1, 20-36, 2002.

5. Zhao, Yu-Long, Yong-Chang Jiao, Gang Zhao, Li Zhang, Yue Song, and Zi-Bin Wong, "Compact planar monopole UWB antenna with band‐notched characteristic," Microwave and Optical Technology Letters, Vol. 50, No. 10, 2656-2658, 2008.

6. Liu, Hsien-Wen, Chia-Hao Ku, Te-Shun Wang, and Chang-Fa Yang, "Compact monopole antenna with band-notched characteristic for UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 9, 397-400, 2010.

7. Patil, Sarang and Vandana Rohokale, "Multiband smart fractal antenna design for converged 5G wireless networks," 2015 International Conference on Pervasive Computing (ICPC), 1-5, Pune, India, 2015.

8. Abdalla, Mahmoud Abdelrahman, Ahmed A. Ibrahim, and Ahmed Boutejdar, "Resonator switching techniques for notched ultra-wideband antenna in wireless applications," IET Microwaves, Antennas & Propagation, Vol. 9, No. 13, 1468-1477, 2015.

9. Zarrabi, Ferdows B., Zahra Mansouri, Navid P. Gandji, and Hamed Kuhestani, "Triple-notch UWB monopole antenna with fractal Koch and T-shaped stub," AEU --- International Journal of Electronics and Communications, Vol. 70, No. 1, 64-69, 2016.

10. Sharma, Anuj Kumar, Vipul Sharma, and Sanjay Singh, "Design and fabrication of mutually coupled feed based cantor fractal patch antenna array for satellite communication," International Journal of Microwave and Optical Technology, Vol. 20, No. 2, 78-90, 2025.

11. Abdelaziz, Ahmed and Ehab K. I. Hamad, "Design of a compact high gain microstrip patch antenna for tri-band 5G wireless communication," Frequenz, Vol. 73, No. 1-2, 45-52, 2018.

12. Liu, Shuo, Shi-Shan Qi, Wen Wu, and Da-Gang Fang, "Single-fed dual-band dual-polarized U-slot patch antenna," 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO), 1-3, Singapore, 2013.

13. Kaur, Navpreet and Narinder Sharma, "Designing of slotted microstrip patch antenna using inset cut line feed for S, C and X band applications," International Journal of Electronics Engineering Research, Vol. 9, No. 7, 957-969, 2017.

14. Shimizu, Keigo and Takafumi Fujimoto, "A printed inverted-F antenna for dual-band dual-sense circular polarization," 2018 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM), 1-1, Nagoya, Japan, Aug. 2018.

15. Varshney, Atul, T. Mary Neebha, Vipul Sharma, J. Grace Jency, and A. Diana Andrushia, "Dodecagon-shaped frequency reconfigurable antenna practically loaded with 3-delta structures for ISM band and wireless applications," IETE Journal of Research, Vol. 69, No. 11, 7747-7759, 2023.

16. Sharma, Anuj Kumar, Vipul Sharma, and Sanjay Singh, "Design and performance analysis of CSRR loaded high gain multiband rectangular microstrip patch antenna array (1 × 2) for IoT and wireless applications," 2024 IEEE 3rd World Conference on Applied Intelligence and Computing (AIC), 1185-1191, Gwalior, India, 2024.

17. Sharma, Anuj K., Vipul Sharma, and Kamal Kapoor, "Historical development of spatial modulation and massive MIMO communication system with implementation challenges: A review," International Journal of Sensors Wireless Communications and Control, Vol. 11, No. 2, 207-215, 2021.

18. Varshney, Atul, Vipul Sharma, and Anuj Kumar Sharma, "RLC-equivalent circuit based stub loaded 2 × 2 MIMO antenna for wireless applications," Microwave Review, Vol. 29, No. 1, 44-54, 2023.

19. Sharma, Anuj Kumar, Vipul Sharma, and Sanjay Singh, "A comprehensive examination of the current state of the art in fractal array antennas," Advances in Systems Science & Applications, Vol. 23, No. 4, 2023.

20. Fonseca, Daniel, Feliphe Pereira, and Ulysses R. C. Vitor, "Study of patch antennas with Koch curve form slots," Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol. 18, 399-407, 2019.

21. Sharma, Narinder and Vipul Sharma, "A design of Microstrip Patch Antenna using hybrid fractal slot for wideband applications," Ain Shams Engineering Journal, Vol. 9, No. 4, 2491-2497, 2018.

22. Balanis, C. A., Antenna Theory, 2nd Ed., John Wiley & Sons, Inc., 1997.

23. Varshney, Atul, Nishigandha Cholake, and Vipul Sharma, "Low-cost ELC-UWB fan-shaped antenna using parasitic SRR triplet for ISM band and PCS applications," International Journal of Electronics Letters, Vol. 10, No. 4, 391-402, 2022.

24. Amini, Amrollah, Homayoon Oraizi, and Mohammad Amin Chaychi zadeh, "Miniaturized UWB log-periodic square fractal antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1322-1325, 2015.

25. Rao, S. S., S. V. N. Lakshmi, and J. S. Roy, "Design and analysis of microstrip antennas on FR4 substrate for wireless communication," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 27, No. 3, 1-9, 2017.

26. Singh, Sanjay, Atul Varshney, Vipul Sharma, I. Elfergani, Chemseddine Zebiri, and Jonathan Rodriguez, "A compact off-set edge fed odd-symmetric hybrid fractal slotted antenna for UWB and space applications," Progress In Electromagnetics Research B, Vol. 102, 37-60, 2023.
doi:10.2528/PIERB23052306

27. Pozar, D. M., Microwave Engineering, 4th Ed., 26-30, John Wiley & Sons, Inc., 2012.

28. Stutzman, W. L. and G. A. Thiele, Antenna Theory and Design, John Wiley & Sons, 2012.

Dr. Anuj Kumar Sharma

Prof. Vipul Sharma

Dr. Sanjay Singh