Sökning: "RF rectifier"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden RF rectifier.

1. 1. Design of radio frequency energy harvesting system : for use in implantable sensors

   Master-uppsats, Linköpings universitet/Elektroniska Kretsar och System; Linköpings universitet/Tekniska fakulteten

   Författare :Amir Ebrahimi; David Kihlberg; [2022]
   Nyckelord :RF energy harvesting; RF rectifier; efficiency; voltage sensor; voltage doubler;

   Sammanfattning : Implantable biomedical wireless sensors provide monitoring of vital health signs such as oxygen, temperature and intraocular pressure and may help to analyse and detect diseases in humans and animals. However, one of the design challenges of implantable devices is providing a safe and reliable energy source. LÄS MER

3. 2. Antenna as a sensor for sensing available LTE networks

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Barath Kumar Sathish Kumar; [2022]
   Nyckelord :Radio Frequency energy harvesting; Antenna as a sensor; Long-Term Evolution; Rectifier; Printed Circuit Board; Altium Designer; Matching network; Voltage multiplier; Schottky diodes; Multiband LTE antenna; Ambient energy harvesting; Low power Internet of Things; Wireless power transfer; Radiofrekvensenergiskörd; Antenn som sensor; LTE; Likriktare; Printed Circuit Board; Altium Designer; Matchande nätverk; Spänningsmultiplikator; Schottky-dioder; Multiband LTE-antenn; Omgivande energiskörd; Lågeffekt Internet of Things; Trådlös kraftöverföring;

   Sammanfattning : This thesis primarily deals with the concept of designing an antenna based device to harvest energy from Radio Frequency (RF) and using the harvested energy to sense the available Long Term Evolution (LTE) network in order for the Internet of Things (IoT) devices to connect to the network for the purpose of transmitting and receiving data. Secondarily the importance of this project is targeting how to conserve battery power in an IoT device and extend it’s lifetime. LÄS MER

4. 3. Wireless Power Transfer in Cavity Resonator

   Kandidat-uppsats, Uppsala universitet/Fasta tillståndets elektronik

   Författare :Axel Djurberg; Fredrik Forsberg; Anton Lind; Ludvig Snihs; [2021]
   Nyckelord :cavity; resonator; radio frequency; wireless power transfer;

   Sammanfattning : The purpose of this paper is to achieve wireless power transfer inside a resonating cavity, and thereby apply this to charge batteries. The idea is to convert radio frequency waves into direct current, which can charge the batteries. This was done by creating an LC-antenna, which in turn was connected to a rectifier. LÄS MER

5. 4. 83% Efficient ASIC Wireless Power Transfer from NFC for Implantable Sensors

   Master-uppsats, Linköpings universitet/Elektroniska Kretsar och System

   Författare :Samir Sabah; [2020]
   Nyckelord :NFC; Wireless power transfer; Rectifier; Electrical stimulation; Nerve regeneration; Bioelectronics.;

   Sammanfattning : In the past decades, there has been a noticeable growth in the deployment of wireless sensor networks. These sensors/stimulators are typically powered by a battery which has limited life span. Power harvesting is one of the solutions to this problem. LÄS MER

7. 5. Energy harvesting from ambient WiFi energy : A method of harvesting and measuring ambient WiFi energy

   Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Alpha Fofana; Carl Mossberg; [2019]
   Nyckelord :Energy harvesting; Rectenna; Impedance matching; Embedded system; IoT; WiFi; Sustainable Energy; Utvinna energi; Impedansmatchning; Inbyggda system; IoT; WiFi; Hållbar utveckling;

   Sammanfattning : The aim of this thesis was to investigate the question of how to harvest RF energy and if we can harvest enough RF energy for it to be useful in an application. It is aimed towards sensor node applications, commonly used in a typical office environment. The WiFi band was chosen since it is omnipresent in the same environment. LÄS MER