Advancing IoT wireless sensor nodes with a low profile multiband RF rectifier based on multi-stub J-Inverter network


Muhammad, Surajo and Tiang, Jun Jiat and Roslee, Mardeni and Waly, Mohamed Ibrahim and Mallat, Nazih Khaddaj and Smida, Amor and Iqbal, Amjad (2023) Advancing IoT wireless sensor nodes with a low profile multiband RF rectifier based on multi-stub J-Inverter network. AEU - International Journal of Electronics and Communications, 171. p. 154869. ISSN 1434- 8411

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In this paper, a unique RF rectifier design is introduced, employing a multi-stub impedance matching network (IMN). The structure of the IMN comprises a series of three sections with multiple stub tuning elements interconnected via a meandered line (MDL) to form multi-frequency susceptance blocks. The rectifier has been developed to work at frequency bands: 1.84, 2.10, and 2.45 GHz. These frequencies align with the designated bands for GSM/1800, UMTS/2100, and Wi-Fi, respectively. By implementing a complete ground architecture, the rectifier utilizes a minimal space of 0.57 on the RT/Duroid 5880 PCB board. The experiment’s outcomes show the proposed RF rectifier’s effectiveness in converting radio frequency (RF) signals into direct current (DC) power (RF-to-DC). The results indicate PCE values of 32.70%, 27.60%, and 24.50%, corresponding to input powers of -20 dBm at the targeted operational frequencies. Additionally, the rectifier design proposed within this study achieves its peak RF-to-DC PCE of 75.30% when energized by an input power of 3 dBm. Moreover, notable stability is demonstrated by the rectifier, sustaining an RF-to-DC PCE surpassing 50% throughout the frequency range spanning 1.7 to 2.4 GHz. This robust performance remains consistent even at lower input power levels, such as -10 dBm Furthermore, the rectifier can produce a direct current (DC) voltage output ( ), measured at 0.411 V in an ambient context. The integration of the rectifier with the power management module (PMM), facilitated through the utilization of the bq25504-674 evaluation module (EVM), successfully established a connection within the PMM system. This integration yielded a of 1.270 V. Hence, through proficient management of the proposed RF rectifier, it becomes feasible to utilize ambient RF signals to energize a range of low-energy devices effectively.

Item Type: Article
Uncontrolled Keywords: RF energy harvesting (RFEH), Impedance matching network (IMN), Power conversion efficiency (PCE), Rectifier, IoT
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK7871 Electronics--Materials
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 05 Oct 2023 01:47
Last Modified: 05 Oct 2023 01:54


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