| Full text | |
| Author(s): |
Diniz, Renan
;
Da Silva, Vinicius Santana
;
da Paz, Humberto Pereira
;
Trevisoli, Renan
;
Casella, Ivan Roberto Santana
;
Capovilla, Carlos Eduardo
Total Authors: 6
|
| Document type: | Journal article |
| Source: | IEEE ACCESS; v. 12, p. 10-pg., 2024-01-01. |
| Abstract | |
This paper aims to study the effects of impedance mismatch in low-power Radio Frequency Energy Harvesting (RFEH) systems caused by the dependence of Schottky diode input impedance on temperature and propose solutions to mitigate them. Thus, the effects of temperature variation on impedance matching and Radio Frequency (RF) to Direct Current (DC) Power Conversion Efficiency (PCE) will be analyzed through the design, simulation and measurement of an RF rectifier to operate at low input power levels in the 2.4 GHz Industrial, Scientific and Medical (ISM) band in two specific temperature ranges, one around the 300 K (reference ambient temperature) and other around the 325 K (higher temperatures). In order to solve the problem of impedance mismatch due to the temperature dependence of the Schottky diode, the RF rectifier is designed with an Input Matching Network (IMN) with trimming of the stubs in parallel that can be enabled or disabled to set up the desired network and operate according to the temperature of the location. Considering an input power ( $P_{in}$ ) of -20 dBm, the PCE obtained with the prototype configured for room temperature ( $P_{300}$ ) and for high temperature ( $P_{325}$ ) are of 14.73% and 10.53% at 283 K, 16.72% and 16.15% at 303 K, 12.74% and 15.39% at 323 K and 5.82% and 11.67% at 343 K, respectively. As possibly expected by this proposal, the results indicate a higher and more stabler PCE at high temperatures in the prototype configured for 325 K while at room temperature the PCE is higher and more stabler in the prototype configured for 300 K. (AU) | |
| FAPESP's process: | 19/25866-7 - RF energy harvesting integrated with wake-up receiver: strategies for self-powered communication |
| Grantee: | Vinícius Santana da Silva |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 22/08737-1 - Smart chargers for electric tourism vehicles using photovoltaic energy with wireless network management |
| Grantee: | Ivan Roberto Santana Casella |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 22/10876-0 - Contributions to rectennas and the use of 5G technology in the RF energy harvesting context |
| Grantee: | Carlos Eduardo Capovilla |
| Support Opportunities: | Regular Research Grants |