Analysis of a Low-Profile Electrically Small Circular Slotted Circular Patch Antenna for Bluetooth Applications
| Authors | Nageswara Rao Lavuri1 , Loya Surendra2 , Geetamma Tummalapalli3 |
| Affiliations |
1Department of ECE, CVR College of Engineering, Hyderabad, Telangana, India 2Department of ECE, Mallareddy (MR) Deemed to be University, Medchal Telangana, India 3Department of Electronics and Communication Engineering, GMR Institute of Technology (GMRIT) – Deemed to be University, 532127 Rajam, Andhra Pradesh, India |
| Е-mail | geethamma.t@gmrit.edu.in |
| Issue | Volume 18, Year 2026, Number 5 |
| Dates | Received 03 June 2026; revised manuscript received 22 October 2026; published online 28 October 2026 |
| Citation | Nageswara Rao Lavuri, Loya Surendra, Geetamma Tummalapalli, J. Nano- Electron. Phys. 18 No 5, 05025 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(5).05025 |
| PACS Number(s) | 84.40.Ba |
| Keywords | Circular slotted circular patch ESA, DGS (10) , HFSS (16) , Compact size, Metamaterial (MM). |
| Annotation |
A low-profile, electrically small circular slotted circular patch antenna is designed and analysed for bluetooth applications that utilises the frequency range of 2.4 GHz. This antenna has a microstrip feed line and a pair of circular slots configured as DGS. This patch antenna overcomes the impedance matching problem by using two circular slots as DGS. Miniaturization and optimal impedance matching are achieved through proximity to the microstrip input line. The FR4 substrate used for the antenna simulation has a thickness of 1.6 mm, εr of 4.4 and tanδ of 0.02. An antenna's basic structure consists of a feeding line that is connected to the antenna to provide 50 Ω impedance matching. This antenna resonates at 2.40 GHz and is one of the smallest electrically compact ones, having overall dimensions of 24 х 24 х 1.6 mm3. At 2.40 GHz, a bandwidth of 2.43 GHz to 2.38 GHz was attained with a VSWR of 1.23 and an S11 of – 28.8 dB. To reduce the size of ESA and accomplish efficient impedance matching, the proposed antenna uses two circular slots as DGS. The advantages of the proposed antenna include its small size, simple design and simplicity of integration into small devices. These results make the circular slotted circular patch antenna appropriate for Bluetooth applications. |
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