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Reconfigurable RF Energy Harvester with Customized Differential PCB Antenna


In this work, a Radio Frequency (RF) Energy Harvester comprised of a differential Radio Frequency-to-Direct Current (RF-DC) converter realized in ST130 nm Complementary Metal-Oxide-Semiconductor (CMOS) technology and a customized broadband Continue reading

An Ionic-Polymer-Metallic Composite Actuator for Reconfigurable Antennas in Mobile Devices


In this paper, a new application of an electro-active-polymer for a radio frequency (RF) switch is presented. We used an ionic polymer metallic composite (IPMC) switch to change the operating frequency of an inverted-F antenna. This switch is light in Continue reading

Face and Lip Tracking in Unconstrained Imagery for Improved Automatic Speech Recognition


When combined with acoustical speech information, visual speech information (lip movement) significantly improves Automatic Speech Recognition (ASR) in acoustically noisy environments. Previous research has demonstrated that visual modality is a Continue reading

A Long-Distance RF-Powered Sensor Node with Adaptive Power Management for IoT Applications


We present a self-sustained battery-less multi-sensor platform with RF harvesting capability down to -17 dBm and implementing a standard DASH7 wireless communication interface. The node operates at distances up to 17 m from Continue reading

Target Read Operation of Passive Ultra High Frequency RFID Tag in a Multiple Tags Environment


Passive ultra-high frequency (UHF) radio frequency Identification (RFID) has emerged as a promising solution for many industrial applications. Passive UHF systems are relatively inexpensive to implement and monitor, as no line of sight is required for Continue reading

Radio Frequency Superconducting Quantum Interference Device Meta-atoms and Metamaterials: Experiment, Theory, and Analysis

Metamamterials are 1D, 2D or 3D arrays of articial atoms. The articial atoms, called “meta-atoms”, can be any component with tailorable electromagnetic properties, such as Continue reading