Download (915MHz and 2450 MHz) Harvester

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
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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