Design of Microstrip Antenna with DGS

Oct 13, 2025 by thesweetdesigns.com 123 views

Introduction

The design of microstrip antennas has been a topic of interest in the field of wireless communication systems. The use of defected ground structure (DGS) in microstrip antennas has been shown to improve their performance by increasing the value of voltage standing wave ratio (VSWR), return loss, and gain, while suppressing the mutual coupling effect between antenna elements. This study discusses the design of a microstrip antenna with 2 rectangular patch elements equipped with DGS in the form of rectangles, with the aim of improving its performance in the frequency range of 3.3 GHz - 3.4 GHz with a middle frequency of 3.35 GHz.

Design of Microstrip Antenna with DGS

The designed microstrip antenna consists of two patch elements arranged in parallel on the substrate. The addition of DGS is expected to increase the value of VSWR and return loss, increase gains, and suppress the mutual coupling effect between antenna elements. The design process is carried out using the 2004 Microwave AWR Simulator.

Simulation Results

The simulation results show that the use of DGS sized (26x26) mm placed in the Y-4 mm position produces a significant increase in the performance of the antenna. The VSWR value was successfully repaired to 1,096, and return loss reached -26.8 dB, while the antenna without DGS had a VSWR value of 1,371 and return loss -16.12 dB.

Advantages of Using DGS

The addition of DGS to the microstrip antenna provides several advantages:

Improved VSWR and Return Loss

DGS changes the impedance of the antenna input, bringing it closer to the transmission characteristic impedance value, thereby increasing the efficiency of energy transfer. This can be seen from the decrease in VSWR and an increase in return loss.

Increased Gain

DGS functions as an additional resonator that can increase the effectiveness of the antenna radiation area, thereby increasing gains.

Emphasis on Mutual Coupling Effects

DGS can help reduce the effect of mutual coupling between antenna elements by modifying the current distribution on the surface of the ground plane. This is important to maintain the stability and performance of the antenna, especially in multi-element applications.

Conclusion

The use of DGS is an effective solution to improve the performance of microstrip antenna 2 quadrilateral patch elements. DGS succeeded in increasing VSWR and return loss, increasing gains, and suppressing the mutual coupling effect. The simulation results show that with the selection of appropriate DGS designs, antenna performance can be significantly optimized.

Application and Potential

Microstrip antennas with DGS have extensive application potential, especially in wireless communication systems. Some examples of applications include:

Cellular Communication System

Improve the performance of smartphone antennas and other mobile devices to improve signal quality.

Wi-Fi System

Increase the reach and speed of internet connection at home and office.

Wireless Sensor System

Improve sensor antenna performance to improve the quality of data sent.

This study opens opportunities for the development of a more efficient and sophisticated microstrip antenna, with the potential to be applied to various applications in the future.

Future Work

Future work can focus on the optimization of DGS designs to further improve the performance of microstrip antennas. Additionally, the use of DGS in other types of antennas, such as patch antennas and microstrip line antennas, can be explored.

Conclusion

In conclusion, the use of DGS in microstrip antennas has been shown to improve their performance by increasing VSWR and return loss, increasing gains, and suppressing the mutual coupling effect. The simulation results show that with the selection of appropriate DGS designs, antenna performance can be significantly optimized. This study opens opportunities for the development of a more efficient and sophisticated microstrip antenna, with the potential to be applied to various applications in the future.

Introduction

In our previous article, we discussed the design of a microstrip antenna with 2 rectangular patch elements equipped with defected ground structure (DGS) in the form of rectangles. This study aimed to improve the performance of the antenna in the frequency range of 3.3 GHz - 3.4 GHz with a middle frequency of 3.35 GHz. In this article, we will answer some frequently asked questions (FAQs) about microstrip antennas with DGS.

Q: What is a microstrip antenna?

A: A microstrip antenna is a type of antenna that consists of a thin layer of conductive material (such as copper) on a dielectric substrate. It is a popular choice for wireless communication systems due to its compact size, low cost, and ease of fabrication.

Q: What is defected ground structure (DGS)?

A: DGS is a technique used to improve the performance of microstrip antennas by modifying the ground plane. It involves creating a defect or a pattern on the ground plane to change the electromagnetic properties of the antenna.

Q: How does DGS improve the performance of microstrip antennas?

A: DGS improves the performance of microstrip antennas by increasing the value of voltage standing wave ratio (VSWR), return loss, and gain, while suppressing the mutual coupling effect between antenna elements.

Q: What are the advantages of using DGS in microstrip antennas?

A: The advantages of using DGS in microstrip antennas include improved VSWR and return loss, increased gain, and reduced mutual coupling effects.

Q: How is DGS designed and optimized?

A: DGS is designed and optimized using computer-aided design (CAD) tools and simulation software, such as Microwave AWR Simulator.

Q: What are the applications of microstrip antennas with DGS?

A: Microstrip antennas with DGS have extensive application potential, especially in wireless communication systems. Some examples of applications include cellular communication systems, Wi-Fi systems, and wireless sensor systems.

Q: Can DGS be used in other types of antennas?

A: Yes, DGS can be used in other types of antennas, such as patch antennas and microstrip line antennas.

Q: What are the future directions for research on microstrip antennas with DGS?

A: Future directions for research on microstrip antennas with DGS include the optimization of DGS designs to further improve the performance of microstrip antennas, and the exploration of DGS in other types of antennas.

Q: How can I design and optimize a microstrip antenna with DGS?

A: You can design and optimize a microstrip antenna with DGS using CAD tools and simulation software, such as Microwave AWR Simulator.

Conclusion

In conclusion, microstrip antennas with DGS have shown great potential in improving the performance of wireless communication systems. By understanding the design and optimization of DGS, researchers and engineers can develop more efficient and sophisticated microstrip antennas for various applications.

References

[1] J. Li, et al., "Design and optimization of microstrip antennas with defected ground structure," IEEE Transactions on Antennas and Propagation, vol. 62, no. 5, pp. 2515-2523, May 2014.
[2] S. K. Sharma, et al., "Defected ground structure for microstrip antennas: A review," International Journal of RF and Microwave Computer-Aided Engineering, vol. 25, no. 3, pp. 251-263, March 2015.
[3] M. A. Alkanhal, et al., "Design and optimization of microstrip antennas with defected ground structure using genetic algorithm," IEEE Transactions on Antennas and Propagation, vol. 63, no. 10, pp. 4635-4643, October 2015.