Microstrip Patch Antenna with Parasitic Elements and Slots for Narrow Bandwidth for Modern Wireless Applications
| Authors | Suganthi Santhanam1 , V. Mohan2, T. Muruganantham3, V. Kavitha4, S. Athinarayanan5, Manjunathan Alagarsamy1 |
| Affiliations |
1Department of Electronics and Communication Engineering, K. Ramakrishnan College of Technology, Tiruchirappalli, Tamil Nadu, India 2Department of Electronics and Communication Engineering, Saranathan College of Engineering, 620012 Thiruchirappalli, Tamil Nadu, India 3Department of Electronics and Communication Engineering, K. Ramakrishnan College of Engineering, Tiruchirappalli, Tamil Nadu, India 4Department of Electronics and Communication Engineering, Sir Issac Newton College of Engineering and Technology, 611102 Nagapattinam, Tamil Nadu, India 5Department of Computer Science and Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, 600062 Chennai, Tamil Nadu, India |
| Е-mail | suganthis.ece@krct.ac.in |
| Issue | Volume 18, Year 2026, Number 5 |
| Dates | Received 20 May 2026; revised manuscript received 18 October 2026; published online 28 October 2026 |
| Citation | Suganthi Santhanam, V. Mohan, et al., J. Nano- Electron. Phys. 18 No 5, 05023 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(5).05023 |
| PACS Number(s) | 84.40.Ba |
| Keywords | Defected ground antenna, Teddy bear shape radiating elements, Return loss, Current distribution, Mobile phones, 5G mobile applications. |
| Annotation |
The present research compares two innovative patches with microstrip topologies using slot with parasitic strips, that are primarily utilized in modern wireless networks involving WiMAX, Wi-Fi or WLAN, along with forthcoming 5G smartphones and tablets. The pair of antennas have been replicated using a FR-4 substrate with a relative permittivity of 4.3 and copper having a diameter outside of 0.035 mm spanning the transmission and grounding planes. A narrow bandwidth of 140 MHz at 3.4 GHz and 350 MHz at 5.88 GHz is accomplished by the suggested Antenna-1. An extra resonant has been achieved in antenna-2 by adding five slots at the top, bottom, and sides of Antenna-1, resulting in Antenna-2 being shaped like a teddy bear. Having return inefficiencies of – 20 dB, – 23 dB, and – 16 dB, accordingly, Antenna-2 exhibits 3 harmonics at 3.25 GHz, 3.7 GHz, and 5.37 GHz. At resonance frequencies of 3.4 GHz and 5.88 GHz, antenna-1 achieved return losses of – 31 and – 16 dB. The greatest surface current densities are 180 A/m and 74 A/m, correspondingly, and the electrical current distribution is consistent throughout the patch area, particularly antennas 1 and 2 having the highest values of 108 A/m and 52.5 A/m, respectively. |
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