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This paper describes a smart system to monitor high temperature in industrial applications. The solution includes a semipassive microchip which allows logging data and wireless reading. Protection for the electronics against high temperature environment is provided by a vacuum packaging. Thermal isolation at 150°C and 800°C ambient temperature allows the system to work properly during 14 and 2 minutes...
This paper considers a wireless power transfer system with multiple antennas by using the multicarrier signal waveforms. A prior art optimizes the waveform with the channel state information at the transmitter (CSIT) to improve the energy harvesting efficiency of the receiver with the non-linear model. The impact of the imperfect CSIT on the energy harvesting capability is studied as a function of...
With the advent of wearable sensors and internet of things (IoT), there is a new focus on electronics which can be bent so that they can be worn or mounted on non-planar objects. Moreover, there is a requirement that these electronics become extremely low cost, to the extent that they become disposable. The flexible and low cost aspects can be addressed by adapting additive manufacturing technologies...
With the advent of wearable sensors and internet of things (IoT), there is a new focus on electronics which can be bent so that they can be worn or mounted on non-planar objects. Moreover, there is a requirement that these electronics become extremely low cost, to the extent that they become disposable. The flexible and low cost aspects can be addressed by adapting additive manufacturing technologies...
An efficient near-field RFID reader, delivering power to and receiving data from Brain-Machine Interface implants, is realized in 65 nm CMOS. A modified Class E/Fodd Power Amplifier with a current-sense resistor differentially drives a single segmented antenna, and acts simultaneously as TX and RX. It operates at 309 MHz and has 54% efficiency. The backscattered data is recovered from the current-sense...
In this paper, we describe a 920 MHz band long range wireless SAW passive tag system (WSPTS) for vibration monitoring, which achieves more than 15 m reading distance. For the purpose of structural health monitoring (SHM) of aging infrastructures (e.g. bridge, building, and so forth), passive wireless sensor systems are an attractive option because they are operated battery-less and almost maintenance...
An original ElectroMagnetic simulation methodology based on the hybridization of deterministic and statistical models is proposed to study wireless signal propagation inside a train. The coupling between the EM methods is performed with the Kron's networks formalism to significantly optimize the compromise between simulations accuracy and computation resources. The proposed hybrid model offers promising...
Aim at the problems existing in the information monitoring of the farmland environment such as the limited energy, low system stability and large monitoring area, a WSN node for rice field based on hybrid antenna is designed to realize the real-time on-line monitoring for the environmental parameters of rice fields in the network. As for the hardware, the node uses a STM32F103VET6 as a processing...
• Even the simplest radio performance test (EVM, ACI, etc.) is now greatly complicated by the need to test through the beamforming network and antennas. — Production line operations could become considerably more expensive. • New production tests are needed to evaluate the array itself. • Even relatively “low-tech” EMC testing is impacted by the new trends in radio design. • The entire industry is...
Tasks to be carried out in maritime are usually expensive due to the use of the manned vessels with large operational crews that includes the safety of life and property at sea environment. Utilization of drones has potential to significantly improve the efficiency and safety of marine and offshore operations. Examples include remotely operated inspection for navigation, surveillance or monitoring...
In the past few years, magnetic induction (MI) communication and networking have attracted significant attentions for wireless applications in underground, underwater, and many other complex and extreme environments. Although the technology is becoming more and more mature, there are still many research challenges, which prohibit MI from being widely applied. One of the most challenging task is to...
Wireless Power Transfer (WPT) is an attractive technology because it can supply power to IoT devices where battery replacement is difficult or the maintenance cost is high. Polarization Switching WPT antenna (PS-WPT antenna) is proposed in this paper. The polarization switching characteristic makes this design a good candidate for 5G-IoT sensors powered by using wireless power transfer. The 3GPP had...
This paper presents a new principle of a passive chipless RFID wireless sensor for a rotational motion measurement and identification. The sensing and identification principles are based on a high quality factor substrate integrated cavity (SIW) resonator with dual antennas at two different angles. Depending on the angle difference between the dual antennas, the backscattered power generates a unique...
In this study, a wireless and passive displacement/strain sensing system is proposed for structural health monitoring (SHM). The wireless and passive interrogation of the sensing unit [a variant of a nested split-ring resonator (NSRR)] is achieved through the near-field interaction and electromagnetic coupling between the single antenna in the system and the multiple sensors called the NSRR probes...
The monitoring of the breathing dynamic characteristics, including the presence of biomarkers in exhaled breath, is of growing interest in noninvasive diagnosis of diseases. We describe a wearable radiofrequency identification (RFID) device hosting a flexible antenna suitable for integration into a facemask and a sensor made of graphene oxide sensitive to the humidity variations. The so obtained wearable...
Researchers consider wireless nanosensor networks (WNSNs) as a revolutionary emerging network paradigm from the point of its diversified applications and contributions to the humanity. Existing research in this field is still in elementary stage and performance enhancement via designing protocol suit represents a potential issue to address for this field. However, most of the studies in the literature...
A compact, 3D printed tripolar antenna operating at 2.4 GHz is presented. The antenna is designed for integration with a commercial wireless node in order to mitigate multipath and depolarization channel effects that could exist in many machine-to-machine deployments. The antenna substrate is fabricated with fused deposition modeling and the conductive layers by micro-dispensing silver paste. A median...
Since the first demonstration of 60GHz connectivity in 1895 there has been much interest and promise in the future of mmW gigabit wireless technology. It has been only recently, with the emergence of millimeter wave and sub-THz (up to 300GHz) CMOS based technology and its potential for true monolithic single chip integration that one can envision a new class of systems and applications ranging from...
This paper presents the pressure readout results from a piezoresistive pressure sensor in a biological environment mimicking the human head properties for intracranial pressure (ICP) monitoring application. The piezoresistive pressure sensor is powered wirelessly through inductively coupled antennas. After successful activation of the sensor, the pressure readout is demonstrated from 0 mmHg to 30...
Wi-Fi has been widely deployed with the rapid development of wireless communication technique. Wi-Fi hotspots are popular in campus, making convenient wireless network access possible. However, during class teaching, in order to avoid students browsing the web based on Wi-Fi hotspots and distracting, we hope Wi-Fi hotspots adaptively shield network access to students in the classroom, while grant...
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