An RFID system is the communication between a reader and a transponder (tag / label) at a defined frequency as a radio communication.
An RFID system has essentially four functional components: memory element, readers, antennas and control.
The reading device is the device that transmits the radio waves to decrypt an existing magnetic field. A passive RFID tag generates the energy from its magnetic field. The circuits in the microchip, allows the reader to transmit the data to the disk.
The controller processes the decrypted message by the reader data for other system processes.
The antenna is designed to emit a coil of copper wire around RFID signals and allows the transfer of the chip information to a reader, which also has an antenna.
The TAG (or transponder) is a memory device, typically EEPROM programmed with a number of bits with an integrated antenna to receive and transmit data.
The basic types of RFID tags can be classified as write and read only. Data stored via the read / write tags can be edited, added, or completely rewritten when the tag is in the range of the reader. Data stored in a read-only tag can be read, but can not be edited in any way. Read / write tags are much more expensive than just read tags.
Active tags include a battery, which generates signals which are transmitted to the reader.
NiZn materials for high freq uncoated cores
|µi||25 ºC; ≤10 kHz; 1mT||250 ± 20%||250 ± 20%||450 ± 20%|
|αF (K-1)||-40 to 85 ºC; ≤10 kHz; 1mT||~25 x 10-6||~1 x 10-6||~0 x 10-6|
|tg δ/µi||25 ºC; 3 MHz; 1mT||<300 x 10-6||<300 x 10-6||<1000 x 10-6|
MnZn materials for high Q applications
|µi||25 ºC; ≤10 kHz; 1mT||2300 ± 20%||2300 ± 20%|
|αF (K-1)||20 to 70 ºC; ≤10 kHz; 1mT||~5 x 10-6||~(0+0.6) x 10-6|
|tg δ/µi||25 ºC; 500 kHz; 1mT||<100 x 10-6||<100 x 10-6|
Other documents inInfocenter