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Long Range Passive RFID readers

Passive long-range RFID readers are designed to read and write passive tags either by passing through a fixed portal or by manually scanning the tag by handheld reader.  The industry standard for a passive long-range RFID reader is up to 15m and it uses ultra-high frequency (UHF) and it has support for multi-port interfaces.

The salient features of the long-range passive RFID reader are its ability to identify the objects exactly at a high rate of reading. The long-range RFID reader operates at a frequency range of 860MHz to 960MHz and can read hundreds of multi-directional tags at the same time within one second. The long-range passive RFID reader is ideal for use in parking areas, warehouse management, access control, and inventory management, etc.

Passive RFID Tag

A passive RFID tag does not require batteries for power. The power is supplied by the reader when the radio waves are emitted from the reader and encountered by the passive RFID tag. The antenna in the tag forms a magnetic field and the tag draws power from it.  The tag then transmits the information stored in it to the reader.

Disadvantages of a passive RFID tag:

Although there are many advantages of passive RFID tags, there are some disadvantages to it as well. First, the passive RFID tag can be read a shorter distance as compared to the active RFID tag.  Further, the devices using electricity may not read the tags well. Third, the tag remains readable even after the machine attached to it has been resold or no longer being tracked.

Advantages of a passive tag

There are many other advantages of passive RFID tags such as a long useful life of about twenty years because passive tags don’t need batteries or any other power source. Passive RFID tags don’t need batteries to work so these are also very cheap. The passive tags are also very small and sometimes it may be as small as a grain of rice. The passive tags can also store unlimited applications about consumer goods.

Typically, passive RFID tags work on passive low-frequency (LF) and high-frequency (HF) and have the read range of up to 3 feet. The simple passive ultrahigh-frequency (UHF) transponder has a read range of 15 to 20 feet. Since the last few years, the designers of passive tags have made new developments in these tags and improved its read range significantly. Now the passive tags can be read from a distance of 80 feet.

Specifications and applications of Passive RFID readers

The passive RFID readers work on the frequency of 902-928Mhz and 4 antennas can be connected with these readers. The passive RFID reader supports standard RS-232, USB, Ethernet communication interfaces and can work under an intensive environment. The long-range passive RFID reader has a fast and accurate reading rate and its firmware can be upgraded online.

The applications of long-range passive RFID readers may include but not limited to the warehouse, E-Toll on highway, supply chain management, logistics, and vehicle parking.



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