RFID Chips: Future Technology on Everyone's Lips

Abstract

Radio frequency identification (RFID), the technology of the future, has long established itself in our everyday lives. It is already deployed in various areas ranging from efficient inventory management and road toll collection through to timing the performance of individual participants in mass sporting events. Given RFID's enormous potential it is only right that it is on everyone's lips.RFID chips combine the physical world of a product with the virtual world of digital data. The technology meets the needs of companies cooperating in a closely knit value chain. RFID will soon be considered an indispensable part of the chain.Inefficiencies in the value chain and efforts to shore up internal security are driving demand for RFID. The retail trade is playing a decisive part in the broad-based roll-out of RFID projects.RFID represents an all-encompassing structural business concept that far transcends simply superseding the bar code. Speed of processing, reading error frequency, data protection and privacy issues, progress in standardisation, and investment costs are still challenges that will ultimately decide the potential of RFID. RFID projects focussed on transparency, reliability or speed of processing are particularly successful.RFID systems will rapidly continue to gain significance. This holds especially in areas where they can be used to manage processes within the value chain. All told, the market for RFID systems is likely to grow globally from EUR 1.5 bn to EUR 22 bn between 2004 and 2010 (average growth rate: +57% p.a.). During the same period, the RFID market in the EU-15 is expected to expand from EUR 0.4 bn to EUR 4 bn (+47% p.a.).

Electrically Tunable Bandpass Filter with Integrated Carrier Suppression for UHF RFID Systems

“…By merely changing this component a filter for the American frequency band from 902 MHz to 930 MHz could be presented. The problem hereby 1 As compared with the 3 MHz bandwidth of the SAW-filter, the 200 kHz bandpass results in a 12 dB improvement of the input sensibility. lies in the different resonant frequencies of these two resonator types.…”

“…Although radio frequency identification has been around for the past few decades, its wide range of implementation, scanning over logistics, identification, passport security, and even human implantation, has lead to a present turnover for the industry surpassing that of the telecommunication branch, with revenues up to 22 billion Euros expected by 2010, [1]. A major part of these systems are based on the back-scattering principle, [2], which also covered the main focus of the presented work.…”

“…1 depicts a typical communication scenario, where the reader has a circular polarized antenna and the tag is equipped with a linear half wave dipole-antenna. Here, the information from the tag is modulated by back-scattering (4) the CW signal sent by the reader (1). Simultaneously, the metal surrounding present in most fabrication environments causes a strong reflection of (1), which is at the same frequency (2).…”

“…Here, the information from the tag is modulated by back-scattering (4) the CW signal sent by the reader (1). Simultaneously, the metal surrounding present in most fabrication environments causes a strong reflection of (1), which is at the same frequency (2). The reflected CW signal (2) received by the RFID reader is principally in the same dimension as the tag reply (4) and can severely throttle the system dynamic range.…”