• K.ASHA
• Dr.S.SWARNALATHA

This paper presents the design and performance analysis of an ultra-wideband (UWB) circular patch multiple-input multiple-output (MIMO) antenna with a defected ground structure (DGS). The proposed antenna design has a compact area of 60x30 mm^2, resulting in a total size of 1800 mm^2. The circular patch configuration allows for improved bandwidth and frequency coverage. The MIMO antenna consists of two circular type patches, with a separation distance of 0.05Ag, where Ag represents the area of the antenna. By optimizing the dimensions and positioning of the circular patches, the antenna achieves resonant frequencies at 2.5, 6.3, 8.2, and 11.64 GHz. This frequency range effectively covers the spectrum from 2.0 to 20.0 GHz, providing excellent UWB performance. To enhance the antenna's performance, a defected ground structure (DGS) is incorporated. The DGS helps in suppressing unwanted harmonics and improves the antenna's radiation characteristics. Additionally, the antenna design is carefully optimized to maintain a voltage standing wave ratio (VSWR) of ≤2, ensuring efficient power transfer and signal integrity. The proposed UWB circular patch MIMO antenna with a defected ground structure offers significant advantages, including a compact form factor, wide frequency coverage, and improved performance. The design and performance analysis presented in this paper demonstrate the potential of this antenna for various wireless communication applications, such as ultra-wideband systems, radar, and wireless sensing.

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"DESIGN AND PERFORMANCE ANALYSIS OF UWB CIRCULAR PATCH ANTENNA WITH DEFECTED GROUND STRUCTURE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 6, page no.j78-j85, June-2023, Available :http://www.jetir.org/papers/JETIR2306913.pdf

"DESIGN AND PERFORMANCE ANALYSIS OF UWB CIRCULAR PATCH ANTENNA WITH DEFECTED GROUND STRUCTURE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 6, page no. ppj78-j85, June-2023, Available at : http://www.jetir.org/papers/JETIR2306913.pdf