Energy harvesting by using piezoelectric materials is one of the most widely used techniques for conversion waste energy into useful. Using this technique, generated vibration from machines can be converted useful electrical energy. In paper, an system that supplies power low-power consumption devices has been designed. The experimental model consists a rotating machine generates mechanical vib...

Energy efficiency is an important criterion in the design of next generation networks for both economic and environmental concerns. This paper presents an energy-efficient router that is able to dynamically adapt its routing capability in response to real-time traffic load, achieving energy proportional routing. The NetFPGA reference router, which operates at one of two frequencies (125 MHz or ...

Experimental methods to study the breakup frequency in industrial devices are increasingly important. Since production-scale often inaccessible single-drop experiments, frequencies for these can only be studied with “global methods”; i.e., estimated from analyzing emulsification-experiment data. However, how much said about local (e.g., needed modelling) global estimates? This question is discu...

Technologies are being developed to manipulate electromagnetic waves using artificially structured materials such as photonic crystals and metamaterials, with the goal of creating primary optical devices. For example, artificial metallic periodic structures show potential for the construction of devices operating in the terahertz frequency regime. Here we demonstrate the fabrication of photo-de...

In this paper we present a new measurement solution for the characterization of high frequency devices under large signal operating conditions. It is shown how a device-under-test (DUT) is put under large signal operating conditions and how one then measures the voltage and current waveforms at the signal ports in order to completely and accurately characterize the DUT behavior.

A diversity monopulse antenna is presented in this paper. This monopulse antenna is based on a dual frequency dual mode ratrace coupler that has been designed by using Composite Right/Left Handed (CRLH) Transmission Lines (TL). The device has two input ports while the (Σ) and (Δ) outputs are interchangable at either of the two operating frequencies. In this way the monopulse antenna can work at...

Low cost and flexible devices such as wearable electronics, e-labels and distributed sensors will make the future "internet of things" viable. To power and communicate with such systems, high frequency rectifiers are crucial components. We present a simple method to manufacture flexible diodes, operating at GHz frequencies, based on self-adhesive composite films of silicon micro-particles (Si-μ...

In this paper a novel approach for analyzing penetration of electromagnetic radiations in human tissue at different frequency is presented. Moreover, we concentrated our work on analyzing the other related factors describing system performance like return loss& Voltage Standing Wave Ratio (VSWR). consider We use different communication frequencies to simulate antenna for analyzing variation in ...

This paper presents the design of a compact microstrip patch antenna with the ability of controlling the number of bands and the operating frequencies independently. Numerical equations are derived using a curve fitting technique to obtain the centre frequency of each band. The antenna comprises a main patch and four sub-patches fed by a 50Ω microstrip line. It is designed to generate up to fiv...