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Download (915MHz and 2450 MHz) Harvester
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915 MHz and 2.45 GHz Electromagnetic Energy Harvester Team Members: Mehmet Sami Ersöz, Hasan İşel, Osman Ceylan Advisors: Dr. H. Bülent Yağcı, Prof. Dr. Selçuk Paker İstanbul Technical University, Electrical and Electronics Faculty RF Electronics Laboratory Wireless Energy Harvester It is a fact that technology has entered in our daily lives with the speed that can’t be followed. Electromagnetic waves which are forming the basis of radio communication can be used as an energy source is a recent idea and one of the most exciting areas of research. Because in the case of an electromagnetic harvester with sufficient efficiency and output power developed, without the need for batteries and by getting rid of cable clutter we will be able to power many low-power electronic devices. Moreover, we will be able to prevent environmental pollution which is occurring because of battery chemicals. Electromagnetic waves can be used via an antenna to be converted to direct current is the basis of this project. The selected bands are 2.45 GHz which is used for wireless internet access and 915 MHz which is used for ISM/GSM band are frequently used in today’s wireless communication. The basis of this project is designing a dual band antenna and a dual band circuit which is able to make RF-DC conversion most efficiently. Under normal conditions very low input power has been chosen because of being very far from the RF signal source. By the way a design with nearly real conditions has been aimed. System has been successfully designed and implemented. Specifications Dual Band System (915 MHz and 2.45 GHz) Small sized (13x1x0.16 cm) 1.4 Volts output DC voltage @915 MHz* 0.2 Volt output DC voltage @2.45 GHz* Lightweight (12.5 grams with SMA connector) Dual Band Antenna Linear polarization 50Ω High gain (2.5 dBi @915MHz and 5 dBi @2.45GHz) *Under 1μW/cm2 power density with 10kΩ load ITU RF Electronics Laboratory – www.rflab.itu.edu.tr System Structure Dual Band Wireless Energy Harvester Antenna Wireless Energy Harvester [email protected] www.rflab.itu.edu.tr Address: İTÜ Ayazağa Kampüsü Elektrik Elektronik Fakultesi oda 1204-1206 Maslak / İstanbul / Turkiye 34469 Tel: +90 212 285 3641 Fax: +90 212 285 3507 ITU RF Electronics Laboratory – www.rflab.itu.edu.tr