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Description:
Low frequency(LF) card refers to the card with frequency from 100 KHz to 125 KHz, of which the typical value is 125 KHz. The technology of HID and EM are common in the market.
The types of chip in LF card:EM4100、EM4200、EM4102、 EM4305,TK4100、T5567/T5577、HITAG2、EM4305、EM4205,Hitag 1、Hitag 2、Hitag S
The low frequency card is generally non-energy card, which gets its operating energy from the near-field of coupling coil of card reader by inductive coupling. When low frequency card transmits data with card reader, it should be placed within the near-field of antenna radiation of card reader. The reading distance of low frequency tag is generally less than 1 meter.
The main advantages of low frequency card are that the chip of card is generally made by ordinary CMOS, featuring saving power and lower cost, the operating frequency is free from the control of radio frequency, and it is very suitable for the application with close range, low speed and small data volume requirement.
The disadvantages of low frequency card mainly embody in that the data volume of card is small, it is only fit for recognizing application in low speed and close range, and it has more turns of antenna and costs more compared with high frequency card.
The low frequency card is mainly used in attendance and access system, hotel locks, animal’s tag and production management of products.
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