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RFID (radio frequency identification) tag antennas usually operate at UHF frequency band. One qualified tag antenna is designed and embedded in railway ticket with international standard ISO/IEC 18000-6C chip. Test results show that the maximum reading distance of the proposed tag antenna can reach 10 cm when the reader's RF transmit power is less than or equal to effective isotropic radiated power...
Integrating RFID data into an enterprise application has been a challenge to RFID adoption, especially for small to medium enterprises. So far RFID middleware has been used to bridge RFID readers and enterprise applications. As middleware and enterprise application are usually deployed using different platform, it proved to be complicated and costly to realize real-time integration. This paper proposes...
The manufacture of RFID antenna tags (RFIDs) using silk-screen printing technology with conductive silver paste is one of economic methods to reduce the cost of RFIDs. The distance between conductive particles is minified via hot compaction to conductive silver paste, resulting in lower resistance and higher Q value. The compaction conditions, including temperature, pressure and time, were systematically...
Several key issues including system noise figure, input linearity, LO phase noise performance and transceiver setting-up time are recapitulated in this paper for the design of single-chip UHF RFID reader. The reader Rx noise figure is different between LBT and normal mode. The input linearity is decided by the maximum interferer due to Tx-to-Rx leakage. Phase noise requirements are to meet with Tx...
A novel single-chip 860-960MHz band UHF RFID reader transceiver IC is fabricated in 0.18μm CMOS technology. The transceiver consists of a compact high-linearity low-noise-figure RF front-end, a programmable analog baseband for Rx path; and an image reject filter, a PGA, a switchable up-conversion modulator and a driver amplifier for Tx path. The 3-bit 3rd-order DSM fractional-N frequency synthesizer...
With RFID technology, an item can be conveniently identified by the identifier of the RFID tag attached to it. Some private information of a tag could however be disclosed because a snooper may derive meaningful information from such an identifier and trace the tag's itinerary. To prevent privacy disclosure from tag IDs, we propose to use an active RFID proxy masking device, known as aRPM, to block...
A low phase noise LC voltage controlled oscillator for UHF radio frequency identification reader is presented in this paper. Symmetrical LC resonators and a low-dropout-regulator are used to suppress the noise from tail current and power supply, respectively. 3-bit switched-capacitor array for coarse tuning followed by MOS varactors for fine tuning to ensure a Low voltage controlled oscillator gain...
In this paper, a CP MIMO antenna system design capable of UHF band operation is presented. By using circular polarization and antenna diversity by selection of the antenna supported by RFID reader chip sets, This MIMO antenna system can have high receiving signal strength and larger antenna beam coverage area, making this design a suitable candidate for RFID application in warehouse tracking. Parameters...
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