|
| Classification Criteria |
Type |
Features |
| Power Supply |
Active |
- The built-in battery enables independent processing and DAQ by connecting to the sensor.
- Reading Distance: A few meters ~ Hundreds of meters
- Location capability, the essence of ubiquitous computing Location Capability |
| Passive |
- Receives power through the reader, and passively reacts within the reading distance.
- While the reading distance is limited to a few centimeters to a few meters, the tag costs little and the service life is semi-permanent. |
| Frequency Band |
Low
(125~134KHz) |
- Short reading distance, no anti-collision function
- Used chiefly for access control and for recognizing animals |
| 13.56MHz |
- At present, most widely used with the same frequency as the smart card.
- Capable of normal read/write and of recognizing around 20 tags at once for a second. |
UHF
(902~928MHz) |
- With the reading distance 5 to 7 meters, capable of recognizing around 800 tags at once for a second.
- The Auto-Id system adopts the WORM technique for the purpose of being applied to logistic chains. |
| 2.45GHz |
- Rising as the standard RFID of Japan, focusing on the miniaturization of tags.
- For read only, Hitachi¡¯s mu-chip is in the process of getting euro notes embedded. |
| Read/Write |
Read only |
- Hitachi¡¯s mu-chip and most low-frequency tags
- EPC tag is WORM(Write Once Read Many)
|
| Read/Wrtie |
-At 13.56 MHz, read and write are possible; for the most part, however, read only
- Products (e.g., Intermac) capable of read/write at UHFs are available; Class 2 EPCs can also read/write. |
| Chips |
Chip |
- All the commercialized tags have embedded chips.
- To overcome the price limitations of silicon-based chips, plastic transistors are under development. |
| Chipless |
- Inkoda Co., Ltd. features thin metal fibers in paper or plastics to create the penetration and diffusion of radio waves and commercialize mu-chips capable of unique identification |
