Results 221 to 230 of about 15,530 (235)
Some of the next articles are maybe not open access.
Passive wireless ultrasonic transducer systems
AIP Conference Proceedings, 2014Inductive coupling and capacitive coupling both offer simple solutions to wirelessly probe ultrasonic transducers. This paper investigates the theory and feasibility of such system in the context of non-destructive evaluation (NDE) applications. Firstly, the physical principles and construction of an inductively coupled transducer system (ICTS) and a ...
C. H. Zhong +2 more
openaire +1 more source
A Passive Wireless Adaptive Repeater for Enhancing the Readout of LC Passive Wireless Sensors
IEEE Microwave and Wireless Components Letters, 2016In this letter, a passive wireless adaptive repeater is proposed to enhance the readout of LC sensors. The frequency spectrum of the repeater can cover that of the sensor so as to realize full-spectrum-enhancing by strong magnetic coupling. The resonant frequency of the passive wireless adaptive repeater is changed via cyclic-scanning by a controlled ...
Lei Dong, Li-Feng Wang, Qing-An Huang
openaire +1 more source
Wireless Passive Stimulation of Engineered Cardiac Tissues
ACS Sensors, 2017We present a battery-free radio frequency (RF) microwave activated wireless stimulator, 25 × 42 × 1.6 mm3 on a flexible substrate, featuring high current delivery, up to 60 mA, to stimulate engineered cardiac tissues. An external antenna shines 2.4 GHz microwave, which is modulated by an inverted pulse to directly control the stimulating waveform, to ...
Shiyi Liu +4 more
openaire +2 more sources
2010
Passive wireless microsystems such as wireless transponders, radio-frequency identification (RFID) tags, wireless microsensors, and biomedical implants, harvest their operational power either from radiofrequency waves emitted by their base station or from other energy sources such as vibration and solar.
openaire +1 more source
Passive wireless microsystems such as wireless transponders, radio-frequency identification (RFID) tags, wireless microsensors, and biomedical implants, harvest their operational power either from radiofrequency waves emitted by their base station or from other energy sources such as vibration and solar.
openaire +1 more source
Passive radar detection using wireless networks
IET International Conference on Radar Systems 2007, 2007We report the first results of simulation and experiments on the utilisation of 802.11 wireless network transmissions in a passive radar system. Target detection of a range of objects has been simulated and then experimentally demonstrated. Waveform analysis shows that some of the modulations used within the transmission sequence have suitable ...
H. Guo +4 more
openaire +1 more source
Passive Wireless Sensor for Force Measurements
IEEE Transactions on Magnetics, 2015The goal of this paper is to investigate fabrication and design of a wireless passive sensor, and its application for measuring normal forces. The proposed force sensor consists of a single coil as an essential part, realized in printed circuit board technology, commercially available elastomer, and ferrite core.
Milica G. Kisic +6 more
openaire +1 more source
A passive wireless integrated humidity sensor
Sensors and Actuators A: Physical, 2002This paper presents a single-chip integrated humidity sensor (IHS) capable of wireless operation through inductive coupling with a remote transmitter. The 1.5/spl times/0.5/spl times/8mm/sup 3/ sensor chip consists of a planar electroplated copper coil (20 /spl mu/m thick, 30 /spl mu/m pitch, and 23 turns) and a silicon substrate separated by a 4100 ...
T.J. Harpster, B. Stark, K. Najafi
openaire +1 more source
Passive Wireless Instrumented Getter
IEEE Sensors Letters, 2023Robert N. Dean, Michael A. Previti
openaire +1 more source
Passive and wireless acoustic wave accelerometer
The Journal of the Acoustical Society of America, 2008An acoustic wave acceleration sensor comprises an acoustic wave device including a plate that functions as a propagation medium and at least one interdigital transducer configured upon the plate. One or more antennas can be integrated with the acoustic wave device, wherein the antenna(s) communicates with interdigital transducers.
James Z. T. Liu, Aziz Rahman
openaire +1 more source
Frequency-Controlled Wireless Passive Microfluidic Devices
2018Microfluidics is a promising technology that is increasingly attracting the attention of researchers due to its high efficiency and low-cost features. Micropumps, micromixers, and microvalves have been widely applied in various biomedical applications due to their compact size and precise dosage controllability. Nevertheless, despite the vast amount of
openaire +1 more source