A remote-powered UWB RFID tag in 0.18μm CMOS is presented. The innovation is to employ asymmetric communication links, i.e. UWB uplink and UHF downlink in order to achieve extremely low power, high data rate and accurate positioning. Measurement shows the tag can operate up to 10Mb/s with minimum input power of 14.1μW, corresponding to 13.9 meters of operation range. Wireless sensing and positi...

A simple propagation model for the VHF and UHF bands is presented. The model is a computational form of the data provided by the FCC F(50,50) propagation curves, and it is aimed to be used by practicing engineers. It allows the estimation of median path loss, received power, or electrical field strength which usually is sufficient in many practical applications. The model is independent of freq...

Radio frequency identification (RFID) is a rapidly developing technology, and RFID sensors have become important components in many common technology applications. The passive ultra-high (UHF) tags used higher data transfer rate longer read range usually come unique small portable application designs. However, these suffer from significant interference when mounted on metallic materials or plac...

A circular sector-shaped dipole antenna with meandered arms based on an artificial magnetic conductor (AMC) is proposed in this study. compact unit cell of the AMC operating within 19–485 MHz designed using a ferrite material, which exhibits high-permeability characteristics high-frequency (HF), very-high-frequency (VHF), and ultra-high-frequency (UHF) bands. The configuration optimally binary ...

A significant barrier in providing affordable rural broadband is to connect the rural and remote places to the optical Point of Presence (PoP) over a distances of few kilometers. A lot of work has been done in the area of long distance WiFi networks. However, these networks require tall towers and high gain (directional) antennas. Also, they work in unlicensed band which has Effective Isotropic...

The potential of RFID (radio frequency identification) technology is analyzed in the context of service robots. Various concepts that differ by operation frequency (LF, HF, UHF) and, thus, by range are analyzed. Typically, the service robot application which is to be supported by RFID, preselects the frequency band by range requirements. Within the DESIRE project, RFID was investigated for plat...