RF enerji hasadi için empedans eşleştirme ve kalite faktörünün araştirmasi

The technology of energy harvesting has received a lot of attention by the researchers in light of the widespread use of electronic devices, especially wireless ones. It has become one of the most important research topics in the world for providing easy and free energy sources. This thesis presents the effect of RF energy harvesting parameters depend on the harvesting system efficiency and the output DC voltage for input power between -35dBm to 25 dBm. In this study, multi-stage Dickson voltage multiplier (DVM) from two to six stages are designed and implemented for various load resistance (i.e. 20, 50, 100, 500, and 1000) kΩ and with a different matching topology such L-matching, T-matching, and Pi-matching. Two Schottky diode models (e.g. HSMS-2852 and HSMS-2822) are used to design the DVM to see their effect on the efficiency and output DC voltage, also to show the quality factor for different impedance matching topology's. All the simulations were done by using the Advance Design System (ADS) 2017. The target frequency selected in the design is 915 MHZ for Industrial, Scientific and Medical Radio Band (ISM band). The simulation results showed an improvement in term of efficiency for the DVM circuit design with matching compared to the DVM circuit without matching at the low level input power. Also, the simulation results show that low load usage increases the efficiency of the harvesting circuit. Besides, using a HSMS-2852 Schottky diode model is better in term of efficiency than the HSMS-2822. And also, for low input power the harvesting system with matching circuit give an advantage over the harvesting system without matching circuit for all design depend on the efficiency level.