scholarly journals High frequency limitations of active rectifier circuits for RFID applications

2016 ◽  
Author(s):  
Julia Fischer ◽  
Johan Borg ◽  
Jonny Johansson
Keyword(s):  
High Frequency ◽  
Active Rectifier ◽  
Rectifier Circuits ◽  
Rfid Applications

scholarly journals High Frequency Soft Switching PWM DC/DC Converter with Secondary Side Active Rectifier

2016 ◽  
Vol 16 (3) ◽  
pp. 3-7 ◽  
Author(s):  
Žatkovič Róbert ◽  
Dudrik Jaroslav ◽  
Trip Daniel
Keyword(s):  
High Frequency ◽  
Soft Switching ◽  
Active Rectifier ◽  
Secondary Side

Compact tag antenna for UHF active RFID applications

2017 ◽  
Vol 9 (7) ◽  
pp. 1427-1432
Author(s):  
Jui-Han Lu ◽  
Zi-Hao Liou
Keyword(s):  
High Frequency ◽  
Metal Plate ◽  
Impedance Bandwidth ◽  
Identification System ◽  
Active Rfid ◽  
Radiofrequency Identification ◽  
Measured Impedance ◽  
Reading Distance ◽  
Rfid Applications ◽  
Peak Gain

By introducing an L-shaped metal plate connecting with the spiral monopole antenna, a planar compact ultra-high-frequency (UHF) tag antenna for radiofrequency identification system is proposed. With the overall antenna size of only 13 × 9 × 1.6 mm3, the proposed tag antenna provides the measured impedance bandwidth of 12 MHz to comply with Taiwan UHF operating band (922–928 MHz). The measured peak gain and antenna efficiency are approximately −1.1 dBi and 27% for Taiwan UHF band, respectively. Meanwhile, the measured reading distance can approach 250 m. Good tag sensitivity is obtained across the desired frequency band.

13.56 MHz Organic Transistor Based Rectifier Circuits for RFID Tags

2005 ◽  
Vol 871 ◽  
Author(s):  
Robert Rotzoll ◽  
Siddharth Mohapatra ◽  
Viorel Olariu ◽  
Robert Wenz ◽  
Michelle Grigas ◽  
...  
Keyword(s):  
High Frequency ◽  
Rfid Tags ◽  
Plastic Substrates ◽  
Rfid Tag ◽  
Full Wave ◽  
Organic Transistor ◽  
Solution Cast ◽  
Radiofrequency Identification ◽  
Channel Lengths ◽  
Rectifier Circuits

AbstractOne of the potential application areas for organic and polymers transistors is in radiofrequency identification (RFID) tags. One of the key components of an RFID tag is the front-end rectifier that must rectify a 13.56 MHz AC signal received from a resonant tuned antenna. The rectifier supplies operating power to the tag. Organic transistor circuits have hitherto not operated at this high frequency. We show that by operating pentacene transistors in the non-quasi-static (NQS) regime such operating speeds can be achieved in rectifier circuits. The circuits were fabricated on flexible plastic substrates and employed a solution-cast dielectric. The pentacene mobilities are in the range 0.1-1.5 cm2/V-s. The channel lengths of the transistors are in the range 2-4 μm. Full-wave NQS mode rectifiers were measured to have voltage rectification efficiency in excess of 28% at 14 MHz, demonstrating that such circuits can be used in RFID tags. These circuits operated successfully at speeds up to 20 MHz.

Sign in / Sign up

Export Citation Format

Share Document