A High Linearity Detection Circuit with Constant Detection Voltage for Resistive Gas Sensor

A New RF Energy Harvesting System Based on Two Architectures to Enhance the DC Output Voltage for WSN Feeding

“…In [26], the authors propose a Si FET-type gas sensor with a localized micro-heater capable of heating up to 124 • C with a power consumption of 4 mW. In [27], a high linearity detection circuit with a constant detection voltage for a resistive gas sensor is proposed. The maximum power consumption of this circuit is only 4.6 mW.…”

“…Feeding ability of the system and both architectures at 22 m from relay antenna compared to minimum required power supply of the gas sensors. The DC powers A1, B1, C1, D1 and E1 correspond to the power supply of sensors given in the references [26][27][28][29][30], respectively.…”

“…As we can see, the RF-EH system as well as the second architecture could feed the cited sensors [26][27][28][29][30] at 22 m from relay antenna. Contrary to the first architecture, which provides a DC power lower than what theses sensors require to be turned on given that they are far from relay antenna (D > 30 m), so these sensors couldn't be powered.…”

“…Figure 32 depicts the minimum required power supply of these sensors and the DC output power supplied by both architectures and the RF-EH system at different distances from the relay antenna. As we can see, the RF-EH system as well as the second architecture could feed the cited sensors [26][27][28][29][30] at 22 m from relay antenna. Contrary to the first architecture, which provides a DC power lower than what theses sensors require to be turned on given that they are far from relay antenna (D > 30 m), so these sensors couldn't be powered.…”