Design of Compact Single Element Antenna for Wideband Communication Systems

Abstract

The design and analysis of a small wideband single antenna that operates in the 2.6 GHz to 8 GHz frequency range for contemporary wireless communication applications are presented in this work. The suggested antenna is built on a FR-4 substrate with compact dimensions and a dielectric constant of 4.3. Throughout the operational band, the antenna has good radi¬ation characteristics and a broad impedance bandwidth. Within the targeted frequency range, the simulated results demonstrate acceptable return loss, VSWR, gain, and radiation efficiency. WLAN, WiMAX, C-band, and other broadband communication systems are among the wireless applications that the antenna supports. The suggested antenna is appropriate for wideband wireless devices since its radiation pattern is consistent across working frequencies. The suggested antenna is a good option for contemporary communication applications due to its small size, straightforward design, and broad working bandwidth.

Introduction

The text presents the design and performance analysis of a compact wideband microstrip antenna intended for modern wireless communication systems such as WLAN, WiMAX, LTE, C-band, and satellite applications. The main goal is to achieve a small-size antenna with a wide operating bandwidth (2.6–8 GHz) while maintaining good radiation characteristics.

The antenna is designed on an FR-4 substrate and uses a modified circular patch with an inner slot and partial ground plane, fed by a microstrip line. Key structural parameters (patch radius, slot size, ground plane dimensions, and feed width) are optimized to improve impedance matching and bandwidth.

The design evolves in three stages:

• A basic rectangular patch antenna with limited bandwidth,
• A modified circular patch with a slot that introduces additional resonances and improves performance,
• A final optimized structure with edge modifications that significantly enhances return loss, bandwidth, and radiation efficiency.

Simulation results using S-parameters, VSWR, and efficiency show clear improvements across each stage. The final design achieves deep resonances and stable performance across 2.6–8 GHz, with excellent impedance matching (S11 below –10 dB over most of the band) and high efficiency.

Conclusion

A compact single-element antenna has been presented for wireless applications. The proposed antenna achieves wide bandwidth, high Efficiency, good maximum gain and good VSWR.Therefore, the antenna is suitable for modern wireless communication systems.

References

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Copyright

Copyright © 2026 Goutam Mahto. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.