RFID Readers

RFID is an acronym that stands for “radio frequency identification.” It is a continuously evolving technology that fundamentally is an automatic identification system that facilitates detection of objects. Purchases will be made easier when bar codes are replaced by RFID tags, also called smart labels. RFID tags are intelligent bar codes that can interact with a networked system for tracking every product that has been put in a shopping cart. They come in two types, namely, inductively coupled RFID tags and capacitively coupled RFID tags.

The basic function of an RFID reader is to communicate with an RFID tag by emanating radio waves through its antenna. RFID readers are categorized on the basis of their range, like UHF (ultra high frequency) and HF (high frequency), which are 13.56 MHz and 2.45 GHz. Their prices are also dependent on their ranges, therefore, UHF readers are the costliest, but prices range from $2500 to $3000.

There are three reasons for these readers being so expensive. First, there is no IC (integrated circuit) integration; second, there is a low quantity in production; and third, customized components are not available. However, according to a new calculation by a research company, the cost of UHF readers may go down by the end of 2006 or in 2007 since more and more dealers will invest into this technology. Also, as requirement levels increase, component costs will decrease.

A new analog front-end IC was launched by Colorado-based company, EM Microelectronic, which works for 13.56 MHz RFID readers. RFID Demonstration Reader, called EMDB408, was introduced by this company. It can be utilized as a reference design and development tool kit.

Also, a new antenna from Poynting Antennas was brought for the 860-960 MHz band. This particular range includes both the European Union and the U.S. RFID bands. RFID technology has bright prospects, and it can be beneficial to the mankind.