International Research Journal of Education and Technology

In contemporary communication systems, there's a growing need for antennas that are both portable and versatile, covering a broad range of frequencies. The proposed antenna features a dual-notch-band rectangular configuration, utilizing microstrip feed lines and printed on a Rogers RT Duroid 5880 substrate with a permittivity (εr) of 2.2 and dimensions measuring 30 × 26.40 mm². To achieve dual-band notched characteristics, the antenna structure incorporates notches or gaps, typically arranged in a three step staircase pattern. The measured performance indicates that the antenna provides bandwidth coverage for VSWR < 2 across the entire UWB band from 3.1 GHz to 10.6 GHz. Its suitability extends to various applications. At 5.734 GHz, it is used for Wi-Fi communication for networks in residential, commercial, and public settings, as well as wireless LANs in enterprise environments and point-to-point links for outdoor networking. At 9.343 GHz, it is used in radar systems for weather monitoring, air traffic control, and military applications, and in satellite communications for uplink and downlink operations within specific satellite bands. The antenna's reconfigurability allows for adjustments in radiation pattern, frequency response, polarization, and other characteristics without the need for physical modifications. The simulated results, obtained using CST STUDIO SUITE 2023, demonstrate various parameters such as return loss, VSWR, gain, and radiation pattern. This research contributes significantly to the evolution of wideband antennas, meeting the escalating demand for dependable and high-performance communication systems across diverse modern applications.

Keywords—VSWR, FR4, dual-notch band, bandwidth, reconfigurability.