Sharif University of Technology Scientia Iranica 1026-3098 Articles in Press 2024 06 23 A Reconfigurable Multi-Band Notched Semi-Circle Engraved UWB Antenna for Wireless Applications 23618 10.24200/sci.2024.63713.8548 EN Subhash Shrimal Department of ECE, Malaviya National Institute of Technology, Jaipur, India-302017 0000-0002-4303-2710 Renu Agrawal Department of ECE, Malaviya National Institute of Technology, Jaipur, India-302017 0000-0001-5124-6244 Indra Bhooshan Sharma Department of ECE, Malaviya National Institute of Technology, Jaipur, India-302017 0000-0001-6368-2078 Joohi Garg Department of ECE, Malaviya National Institute of Technology, Jaipur, India-302017 M. M. Sharma Department of ECE, Malaviya National Institute of Technology, Jaipur, India-302017 0000-0001-9892-636X Journal Article 2023 12 07 This work presents a small reconfigurable UWB (Ultra-Wide-Band) antenna with quad-band notches that may be used for multi-notching bands and anti-interference. It consists of a semi-circle engraved stepped-cut monopole antenna with two bevels. The slotted ground is also provided with two bevels to get enhanced bandwidth, from 3.1 to 11.67 GHz (116%). The two bevels also aid in achieving impedance matching, particularly over 9.9 GHz. To get notch characteristics covering the 5G band in 3.40-3.70 GHz (n78) and 4.84-5.70 GHz (n46), the patch is provided with L-shaped and Ladder-shaped stubs of quarter wavelength. A band-notch function is obtained at 3.88-4.32 GHz (n77, C-band), 7.10-7.61 GHz (X-band satellite downlink), and 8.04-8.68 GHz (ITU-8 GHz) by incorporating a half wavelength C-shaped slot, an I-shaped stub on the patch, and two RSRRs close to microstrip feed-line. The suggested antenna has eight PIN diodes that regulate several operating modes, allowing it to accomplish single/double/triple/quadruple band-notch characteristics. The size of the patch is 0.25λ x 0.37λ mm2 and printed on Rogers RT/duroid-5880 substrate. The simulated, measured, and equivalent circuit results match well with each other. It offers a stable gain and acceptable radiation pattern throughout the UWB band except for notch bands. https://scientiairanica.sharif.edu/article_23618_80d4c0e3d8705d1ae4cfd19dd89fa34a.pdf