Electrical excitation and detection of magnetic dynamics with impedance matching [PDF]
Applied Physics Letters, 2012 Motivated by the prospects of increased measurement bandwidth, improved signal to noise ratio, and access to the full complex magnetic susceptibility we develop a technique to extract microwave voltages from our high resistance (∼10kΩ) (Ga,Mn)As microbars. We drive magnetization precession with microwave frequency current, using a mechanism that relies
Fang, D. +5 more
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Sensors, 2021 The development of biomedical devices benefits patients by offering real-time healthcare. In particular, pacemakers have gained a great deal of attention because they offer opportunities for monitoring the patient’s vitals and biological statics in real ...
Ilkyu Kim +3 more
doaj +1 more source
Impedance Matching Network Based on Metasurfaces (2-D Metamaterials) for Electrically Small Antennas [PDF]
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 2020 The paper shows the gain-bandwidth limitations of traditional discrete component matching used in electrically small antennas can be overcome by implementing the impedance matching network with metasurface. The proposed metasurface can optimize maximum power transfer to electrically small antennas and achieve superior broadband performance.
Alibakhshikenari M. +5 more
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Geometric Scattering in Robotic Telemanipulation [PDF]
, 2002 In this paper, we study the interconnection of two robots, which are modeled as port-controlled Hamiltonian systems through a transmission line with time delay. There will be no analysis of the time delay, but its presence justifies the use of scattering
Mashke, Bernhard +3 more
core +5 more sources
Experimental investigation of inter-element isolation in a medical array transducer at various manufacturing stages [PDF]
, 2016 This work presents the experimental investigation of vibration maps of a linear array transducer with 192 piezoelements by means of a laser Doppler vibrometer at various manufacturing finishing steps in air and in water.
Bini, Fabiano +2 more
core +1 more source
A 300-800MHz Tunable Filter and Linearized LNA applied in a Low-Noise Harmonic-Rejection RF-Sampling Receiver [PDF]
, 2010 A multiband flexible RF-sampling receiver aimed at software-defined radio is presented. The wideband RF sampling function is enabled by a recently proposed discrete-time mixing downconverter. This work exploits a voltage-sensing LNA preceded by a tunable
Klumperink, Eric A.M. +3 more
core +3 more sources
Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers [PDF]
, 2009 Conventionally, in order to acoustically match thickness mode piezoelectric transducers to a low acoustic impedance load medium, multiple quarter wavelength (QW) matching layers are employed at the front face of the device.
Hayward, Gordon +6 more
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Study on frequency tracking method of ultrasonic scalpel based on impedance matching
Dianzi Jishu Yingyong, 2019 With the development of science and technology, ultrasonic scalpel is widely used in medical treatment. In practical application, in order to make the transducer of the ultrasonic scalpel convert electrical energy into mechanical energy as much as ...
Yang Lin +5 more
doaj +1 more source
Fully integrated CMOS power amplifier design using the distributed active-transformer architecture [PDF]
, 2002 A novel on-chip impedance matching and power-combining method, the distributed active transformer is presented. It combines several low-voltage push-pull amplifiers efficiently with their outputs in series to produce a larger output power while ...
Aoki, Ichiro +3 more
core +1 more source
Optimum values of electrical circuit for energy harvesting using a beam and piezoelectric elements
Mechanical Engineering Journal, 2017 This paper describes optimum values of an electrical circuit for energy harvesting using a beam and piezoelectric elements. Energy harvesting techniques recover energy from the environment. We target the energy harvesting methods that extract energy from
Keisuke YAMADA +3 more
doaj +1 more source