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Ultra-Wideband (UWB) technology is widely recognised as a key enabler for next-generation Internet of Things (IoT) applications due to its large bandwidth, low power consumption, and high data transmission capability. However, UWB systems coexist with several narrowband wireless services such as WiMAX, WLAN, and X-band satellite communication, which may cause severe electromagnetic interference. To address this issue, this paper presents the design and analysis of a compact multi-notched UWB circular patch antenna incorporating a defected ground structure (DGS). The proposed antenna operates over the UWB frequency range of 3.1–10.6 GHz while introducing multiple band-notched characteristics to suppress interference from coexisting wireless systems. The band-notched behaviour is achieved through slot loading on the circular radiating patch and an optimised DGS on the ground plane. The antenna is designed on a low-cost FR4 substrate and optimised using full-wave electromagnetic simulation software. Simulation results demonstrate wide impedance bandwidth, effective multi-band rejection, stable radiation patterns, and satisfactory gain performance, making the antenna suitable for compact IoT wireless devices.
Keywords:
Ultra-Wideband (UWB), Circular Patch Antenna, Defected Ground Structure (DGS), Band-Notch, Internet of Things (IoT).
Cite Article:
"Design of a Compact Multi-Notched UWB Circular Patch Antenna with Defected Ground Structure for IoT Wireless Devices", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2456-3315, Vol.11, Issue 4, page no.a1-a5, April-2026, Available :http://www.ijrti.org/papers/IJRTI2604001.pdf
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2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator