Citation :

T. Narasimha Murthy, N. Balasubrahmanyam, A V Narasimha Rao, "Coplanar Wave Guide-fed Frequency Reconfigurable Meander Line Monopole Antenna for IoT Applications," International Journal of Electronics and Communication Engineering, vol. 13, no. 5, pp. 198-205, 2026. Crossref, https://doi.org/10.14445/23488549/IJECE-V13I5P117

Abstract

This research paper represents the work of designing and developing a compact tri-band frequency reconfigurable monopole antenna useful in radio communication for LoRa applications. This is part of the work to design miniaturized, multiband, and energy-efficient antennas for radio signal communication in IoT devices. The radiating structure geometry of the antenna is a meander line monopole, which consists of a switching mechanism using PIN diodes to cover the operational bands of sub-GHz and 2.4 GHz radio communication of low-power long-range IoT devices. It operates within the 868 MHz, 915 MHz, and 2.4 GHz frequency bands, aligning with the designated bands for different geographical standards, and the mechanism of reconfiguration is achieved by incorporating PIN diode switches. The antenna is designed, simulated, and optimized in the CST Studio Suite design tool. The practical performance validation of the fabricated prototype is done by measuring the S11 and impedance bandwidth, both of which are within the acceptable range for the required design.

Keywords

Internet of Things, LoRa, Meander line, Miniaturization, PIN diode, Return loss, CST Studio.

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