Development of AC current comparator based on coaxial cable for enlarging measurement frequency range up to 10 kHz

2008 ◽  
Author(s):  
K. Takahashi ◽  
K. Yagi
Keyword(s):  
Coaxial Cable ◽  
Frequency Range ◽  
Current Comparator ◽  
Measurement Frequency ◽  
Ac Current

scholarly journals 10703 Microforce Measurement Using a Zero-compliance Mechanism : 3rd report: Discussion about the measurement frequency range

2014 ◽  
Vol 2014.20 (0) ◽  
pp. _10703-1_-_10703-2_
Author(s):  
Atsushi TAKABAYASHI ◽  
Takeshi MIZUNO ◽  
Yuji ISHINO ◽  
Masaya Takasaki
Keyword(s):  
Frequency Range ◽  
Measurement Frequency ◽  
Compliance Mechanism

The Acoustically Excited Flame

1976 ◽  
Vol 98 (2) ◽  
pp. 147-157 ◽  
Author(s):  
P. J. Vermeulen ◽  
M. S. Danilowich ◽  
E. P. Heydlauff ◽  
T. W. Price
Keyword(s):  
Fundamental Frequency ◽  
High Speed ◽  
Acoustic Measurements ◽  
Frequency Range ◽  
Hydrodynamic Behavior ◽  
Measurement Frequency ◽  
Forced Vortex ◽  
Sound Amplification ◽  
Premixed Laminar

A premixed laminar propane-air flame burning at the exit of a nozzle, was acoustically excited upstream by a speaker-driver unit. Detailed acoustic measurements were made to show that sound amplification and attenuation can occur over the measurement frequency range from 50 Hz to 350 Hz. The effect of excitation strength and fuel-air ratio was also investigated. Two acoustic phenomena related by forced vortex hydrodynamic behavior have been identified, and were investigated by means of high speed schlieren photographic measurements. The generation of a one-half harmonic of the fundamental frequency was explored and explained in terms of vortex hydrodynamic behavior. The work contributes to the understanding of the origin of noise from acoustically excited combustors.

scholarly journals Snaps to Connect Coaxial and Microstrip Lines in Wearable Systems

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Tiiti Kellomäki
Keyword(s):  
System Design ◽  
Equivalent Circuit ◽  
Microstrip Line ◽  
Return Loss ◽  
Coaxial Cable ◽  
Frequency Range ◽  
Microstrip Lines ◽  
Wearable Antennas ◽  
Wearable Systems ◽  
Approximate Equations

Commercial snaps (clothing fasteners) can be used to connect a coaxial cable to a microstrip line. This is useful in the context of wearable antennas, especially in consumer applications and disposable connections. The measuredS-parameters of the transition are presented, and an equivalent circuit and approximate equations are derived for system design purposes. The proposed connection is usable up to 1.5 GHz (10 dB return loss condition), and the frequency range can be extended to 2 GHz if a thinner, more flexible coaxial cable is used.

scholarly journals Application of Novel Printed Dipole Antenna to Design Broadband Planar Phased Array

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Jie Xu ◽  
Wenbin Dou
Keyword(s):  
Mutual Coupling ◽  
Phased Array ◽  
Coupling Effect ◽  
Dipole Antenna ◽  
Coaxial Cable ◽  
Impedance Bandwidth ◽  
Frequency Range ◽  
Dipole Antennas ◽  
Outer Conductor ◽  
Ground Plate

A broadband planar phased array consisting of 22 linear printed dipole antennas (PDA) is presented in this paper. The element is designed by a coax probe feeding mechanism with a ground plate configuration. The PDA with two arms placed on both sides of a substrate is realized. The inner conductor of the coaxial cable is connected to the PDA’s upper arm, and the outer conductor is connected to the PDA’s lower arm, so it eliminates the balun. The impedance bandwidth of the PDA array can be improved by increasing mutual coupling effect between the adjacent array elements. A dielectric layer, which is integrated on the surface of the antenna, is designed and fabricated to improve the impedance bandwidth and to shield the array. The measured results indicate the active VSWR is less than 3 over the frequency range of 4–20 GHz.

Electrical impedance investigation of gamma-irradiated TlInS2〈5%C〉 crystals

2020 ◽  
pp. 2150009
Author(s):  
O. A. Samedov ◽  
O. Z. Alekperov ◽  
Kh. B. Orudjova ◽  
N. M. Mehtiyev ◽  
A. I. Nadjafov ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Radiation Dose ◽  
Electric Field ◽  
Electrical Impedance ◽  
Impedance Spectra ◽  
Frequency Range ◽  
Measurement Frequency ◽  
Measured Frequency ◽  
Measured Frequency Range ◽  
Gamma Irradiated

In this article, the authors carry out a pioneering study of monocrystalline TlInS[Formula: see text] at higher than room-temperatures using impedance spectroscopy. It is shown that in TlInS[Formula: see text] crystals at temperatures higher than 400 K, the nature of conductivity is predominantly ionic. Moreover, characteristics of impedance spectra behavior of TlInS[Formula: see text] monocrystal samples were studied using the measurement frequency range of 25–106 Hz. For the measured frequency range, it is shown that curves of active and reactive impedance components undergo a dispersion characterized by decreasing values of [Formula: see text] and [Formula: see text], as the frequency of the electric field and radiation dose increases.

scholarly journals Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency

2019 ◽  
Vol 20 (9) ◽  
pp. 2230 ◽  
Author(s):  
Sergei A. Kostrov ◽  
Mikhail Shamonin ◽  
Gennady V. Stepanov ◽  
Elena Yu. Kramarenko
Keyword(s):  
Magnetic Field ◽  
Dielectric Loss ◽  
Filler Concentration ◽  
Test Frequency ◽  
Iron Particles ◽  
Frequency Range ◽  
Measurement Frequency ◽  
Mean Diameter ◽  
The Magnetic Field ◽  
Silicone Matrix

The magnetodielectric response of magnetoactive elastomers (MAEs) in its dependence on filler concentration, magnetic field, and test frequency is studied experimentally. MAEs are synthesized on the basis of a silicone matrix filled with spherical carbonyl iron particles characterized by a mean diameter of 4.5 µm. The concentration of the magnetic filler within composite materials is equal to 70, 75, and 80 mass%. The effective lossless permittivity ε′ as well as the dielectric loss tanδ grow significantly when the magnetic field increases. The permittivity increases and the dielectric loss decreases with increasing filler concentration. In the measurement frequency range between 1 kHz and 200 kHz, the frequency hardly affects the values of ε′ and tanδ in the absence of a magnetic field. However, both parameters decrease considerably with the growing frequency in a constant magnetic field. The more strongly the magnetic field is applied, the larger the change in permittivity and loss tangent at the same test frequency is observed. An equivalent circuit formulation qualitatively describes the main tendencies of the magnetodielectric response.

scholarly journals Engineering the microwave to infrared noise photon flux for superconducting quantum systems

2022 ◽  
Vol 9 (1) ◽  
Author(s):  
Sergey Danilin ◽  
João Barbosa ◽  
Michael Farage ◽  
Zimo Zhao ◽  
Xiaobang Shang ◽  
...  
Keyword(s):  
Experimental Data ◽  
Coherent Control ◽  
Quantum Circuit ◽  
Quantum Systems ◽  
Coaxial Cable ◽  
Photon Flux ◽  
Relative Dielectric Permittivity ◽  
Pair Breaking ◽  
Frequency Range ◽  
Millikelvin Temperatures

AbstractElectromagnetic filtering is essential for the coherent control, operation and readout of superconducting quantum circuits at milliKelvin temperatures. The suppression of spurious modes around transition frequencies of a few GHz is well understood and mainly achieved by on-chip and package considerations. Noise photons of higher frequencies – beyond the pair-breaking energies – cause decoherence and require spectral engineering before reaching the packaged quantum chip. The external wires that pass into the refrigerator and go down to the quantum circuit provide a direct path for these photons. This article contains quantitative analysis and experimental data for the noise photon flux through coaxial, filtered wiring. The attenuation of the coaxial cable at room temperature and the noise photon flux estimates for typical wiring configurations are provided. Compact cryogenic microwave low-pass filters with CR-110 and Esorb-230 absorptive dielectric fillings are presented along with experimental data at room and cryogenic temperatures up to 70 GHz. Filter cut-off frequencies between 1 to 10 GHz are set by the filter length, and the roll-off is material dependent. The relative dielectric permittivity and magnetic permeability for the Esorb-230 material in the pair-breaking frequency range of 75 to 110 GHz are measured, and the filter properties in this frequency range are calculated. The estimated dramatic suppression of the noise photon flux due to the filter proves its usefulness for experiments with superconducting quantum systems.

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