In the broad context of Wireless Body Sensor Networks for healthcare and pervasive applications, design wearable antennas offers possibility ubiquitous monitoring, communication energy harvesting storage. Specific requirements are a planar structure flexible construction materials. Several properties materials influence behaviour antenna. For instance, bandwidth efficiency microstrip antenna mainly determined by permittivity thickness substrate. The use textiles in requires characterization...

Energy harvesting is well established as one of the prominent enabling technologies [along with radio-frequency identification (RFID), wireless power transfer, and green electronics] for pervasive development Internet Things (IoT). This paper focuses on a particular, yet broad, class systems that falls in IoT category large area electronics (LAE). represented by “smart surfaces.” The paper, after an introductory overview about how smart surfaces are collocated LAE scenario, first deals...

The Internet of Things (IoT) scenario is strongly related with the advance development wireless sensor networks (WSN) and radio frequency identification (RFID) systems. Additionally, in WSN context, for a continuous feed, integration textile antennas energy harvesting into smart clothing particularly interesting solution when replacement batteries not easy to practice, such as wearable devices. This paper presents E-Caption: Smart Sustainable Coat. It has an embedded dual-band antenna...

In this paper, we identify the spectrum opportunities for radio frequency (RF) energy harvesting through power density measurements from 350 MHz to 3 GHz. The field trials have been performed in Covilhâ by using NAKDA-SMR analyser with a measuring antenna. Based on identification of most promising opportunities, dual-band band printed antenna operating at GSM bands (900/1800) is proposed, gains order 1.8-2.06 dBi and efficiency 77.6-84%. Guidelines design RF circuits choice textile materials...

This paper presents the design of low-cost, conformal UHF antennas and RFID tags on two types cork substrates: natural agglomerate cork. Such find an application in wine bottle barrel identification, addition, they are suitable for numerous antenna-based sensing applications. includes high-frequency characterization selected substrates considering anisotropic behavior such materials. In variation their permittivity values as a function humidity is also verified. As proof-of-concept...

This paper proposes a possible implementation of compact printed monopole antenna, useful to operate in UMTS and WLAN bands. In order accomplish that, miniaturization technique based on the application chip inductors is used conjunction with frequency reconfiguration capability. The change impedance response monopole, allowing reduce resonant frequency. be able antenna these two different frequencies, an PIN diodes applied. procedure allows active form leading shift prototype measurements...

This paper presents spectrum opportunities for radio frequency (RF) energy harvesting identified through power density measurements from 350 MHz to 3 GHz. The field trials have been performed in two different cities (Covilha and Lisbon), by using the NARDA-SMR analyser with measuring antenna, Signal Hound analysers, respectively. scope of our research considers RF devices, enabling convert direct current (DC), providing an alternative source supply wireless sensor network (WSN) devices....

In this paper the use of Wireless Power Transmission is employed to power up ID sensors located below a ceramic tile. The system developed with technique allows implementation very low cost indoor localization based on RFID. This passive sensor identification then transmitted through SimpliciTy connection database, where location algorithm implemented. was built and tested in test bed environment satisfactory results.

Radio frequency (RF) energy harvesting is an emerging technology that will enable to drive the next generation of wireless sensor networks (WSNs) without need using batteries. In this paper, we present RF circuits specifically developed for GSM bands (900/1800) and a wearable dual-band antenna suitable possible implementation within clothes body worn applications. Besides, address development experimental characterization three different prototypes five-stage Dickson voltage multiplier (with...

In this study the authors present a possible solution for compact printed folded dipole antenna, designed to match an nRF51822 Bluetooth Smart device. The use of differential design avoids need balun and matching network between IC therefore, reducing power loss in these components. performance proposed is compared with standard application quarter-wave monopole antenna as by manufacturer commercial ceramic antenna. It shown that presents better radiation properties than other two...

Knowledge of the electromagnetic properties textile materials is crucial in order to design wearable antennas. Despite growth research studies on antennas, accurate characterization dielectric still a challenge due intrinsic inhomogeneity and deformability textiles. In this work, 11 were characterized using resonator-based experimental technique. The results obtained method have shown that when positioning roughest face Material Under Test (MUT) contact with resonator board, extracted...

The design of a fully passive RFID enabled temperature sensor implemented on cork substrate is presented. A UHF tag designed based commercial chip and 3D meandered dipole antenna. antenna fabricated by milling the radiating structure copper tape gluing it rectangular prism shape leading to low profile design. matching network modified include thermistor element. It optimized using electromagnetic simulation maximize its impedance sensitivity variations thus successfully implementing sensor....

A new dual-input wideband dynamic Quadratic Poly-Harmonic Distortion (D-QPHD) model for unmatched power amplifiers (PAs) is proposed and validated in this article. Compared with the PHD (D-PHD) model, approach significantly improves prediction accuracy. As has reduced complexity, it also more robust against possible rank deficiency problems, but still preserves accuracy, when compared recently double-input double-output (DIDO) model. The parameters of have smaller magnitude distribution...

In this paper we propose a possible design for RFID tag antenna embedded into cork. The is small and conformal intended to be used bottle stoppers tracking logging purposes of wine or other beverages. proposed based on inductive ring an added resistance in order modify the current distributions antenna. resulting has relatively directive radiation pattern despite efficiency it able operated with commercial reader at reasonable distance.

Energy harvesting is the process by which energy derived from external sources captured, and stored for small, wireless autonomous devices, like those used in wearable electronics sensor networks. This paper presents design of two textile antenna suitable to harvest GSM900 DCS 1800 bands. The antennas gain, are order 2 dBi efficiency 80%.

This paper presents the design of two UHF RFID tags in cork substrate. The are designed to be compact and conformal fit within size shape bottle barrel stoppers. In a first step, selected material is characterized taking into account anisotropic properties substrates after characterization optimized cover certain read range when placed inside corks.

The present work addresses the design of an electronic system for powering autonomous underwater vehicles (AUVs). We report study and implementation a developed transmitting receiving wireless power in water from docking station to AUV. A simplified analysis is presented regarding operation class-D driver series-series inductive resonant coupling topology. further investigate compromise between link efficiency delivery circumvent reduced output capability. Simulation results are provided as...

Field trials have been performed in Covilhã to identify the spectrum opportunities for radio frequency (RF) energy harvesting through power density measurements from 350 MHz 3 GHz. Based on identification of most promising opportunities, a dual-band printed antenna was conceived, operating at GSM bands (900/1800), with gains 1.8 and 2.06 dBi, efficiency varying 77.6 82%, highest lowest bands, respectively. In this paper, guidelines design RF circuits choice textile materials wearable are...

In this paper we present a possible solution for an RFID tag antenna to be used in bottle labels. To develop transmission line method order estimate the permittivity and dissipation factor of as substrate also glass that is bottles. Two prototypes were developed test performed with Alien ALR-8800 reader, which demonstrated proper functioning conditions proposed how it surpasses commercially available tags.

In the context of Wireless Body Sensor Networks for healthcare and pervasive applications, textile antennas allow an ubiquitous monitoring, communication, energy harvesting storage. This paper presents a smart coat with dual-band antenna Radio Frequency (RF) harvesting, operating at GSM 900 DSC 1800 bands, which is fully embedded in garment. Results obtained before after integration into garment are compared. The gain simulation about 1.8 dBi 2.06 dBi, radiation efficiency 82% 77,6% lowest...

DOI: 10.1049/cp.2009.0849 ISBN: 978 1 84919 126 5 Location: Prague, Czech Republic Conference date: 8-11 June 2009 Format: PDF This paper describes the state-of-the-art in microgeneration integration on Portuguese grid. After describing legal framework related with connection of grid, and response associated a recent Decree-Law (DL) enacted to regulate some results are presented concerning EDP-Distribution's (EDP) experience evaluating operational conditions connected Low Voltage (LV) It is...