Results 221 to 230 of about 7,734 (252)
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NMR Imaging with shorted coaxial line probes
Magnetic Resonance Imaging, 1995At frequencies below 1 GHz, resonant sections of coaxial lines have long been used in CW-Electron Paramagnetic Resonance (EPR) with the sample placed at the position of maximum B1 at a short circuited end. Here, we show that because of the excellent separation of the B and E fields, the shield of the line can be removed in the region of the truncated ...
K A, Rubinson, M, Boska
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Coaxial probe for dielectric measurements of aerated pulverized materials
2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2018Knowledge about the dielectric properties of materials, i.e., the relative permittivity and the conductivity, is important for various sensing applications and engineering. In pneumatic conveying systems, the dielectric properties of the transported good are affected by the transport gas, which aerates the pulverized material, effectively decreasing ...
Markus Neumayer +2 more
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A coaxial probe feed model for FDTD
Microwave and Optical Technology Letters, 2002AbstractA new FDTD model for a coaxial probe feed based on transmission lines is proposed. Both the metal probe and a material boundary at the transmission line to FDTD interface are accurately modeled. Comparisons with experimental data indicate a significant improvement compared with a previously published transmission‐line feed model.
Riku Mäkinen +3 more
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Archives of Ophthalmology, 1979
A coaxial electrode probe that uses the principle of bipolar coagulation is introduced to ophthalmic microsurgery. The central, or axial, electrode is insulated with silicone from the surrounding outer, or coaxial, diameter electrode. The probe uses available bipolar electrode cautery power and control sources.
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A coaxial electrode probe that uses the principle of bipolar coagulation is introduced to ophthalmic microsurgery. The central, or axial, electrode is insulated with silicone from the surrounding outer, or coaxial, diameter electrode. The probe uses available bipolar electrode cautery power and control sources.
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Nuclear Instruments and Methods, 1974
The performance of the coaxial beam probe is improved by correct termination with the characteristic impedance of the coaxial probe. Test results are presented with 30 keV electron bunches at 50 x 10/sup 7/ pps. (WHK) Three methods devised for ripple elimination in the power supply of the 7-GeV proton synchrotron Nimrod are described.
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The performance of the coaxial beam probe is improved by correct termination with the characteristic impedance of the coaxial probe. Test results are presented with 30 keV electron bunches at 50 x 10/sup 7/ pps. (WHK) Three methods devised for ripple elimination in the power supply of the 7-GeV proton synchrotron Nimrod are described.
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Coaxial probe modeling in waveguides and cavities
IEEE Transactions on Microwave Theory and Techniques, 1992Modeling, design, and sensitivity analysis of probe-excited cavities are presented. The three-cavity-moment method is used to obtain the two-port scattering matrix of the probe-excited semi-infinite waveguide while a novel equivalent circuit is introduced and used as a circuit model for the scattering matrix.
J.-F. Liang, H.-C. Chang, K.A. Zaki
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An Probe Antenna Using Coaxial Cable
2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM), 2019Sensor antenna is an interesting concept for nondestructive testing. For example, we can observe the stats of reinforced concrete (RC) in buildings. However, if the concrete gets moisture by rain and so on, the quality of concrete will deteriorate. To avoid this, we have to regularly monitor the quality of the concrete.
Hibiki Hamaguchi +2 more
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Conformal antennas with coaxial probe feed
2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON), 2016The article presents analysis of the impact of cylindrical antennas radius of curvature on their basic parameters and characteristics of radiation. For the selected frequency range there was designed planar and cylindrical microstrip antenna with coaxial feed. For conformal surface radius length was varied in the range 0.2 – 50 Λ0.
Marek Bugaj +3 more
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Microwave heating on outside of biliary stent by coaxial probe
Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies, 2011Microwave thermal therapy is one of the modalities for cancer treatment. One example is microwave hyperthermia which is a thermal therapy for carcinoma based on the decrease of the survival ratio of cancer cells by heating. In particular, we have been studying the intracavitary heating using the implanted biliary stent and a thin coaxial microwave ...
Hiroshi Itakura +3 more
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Input impedance of a coaxial-line fed probe in a thick coaxial-line waveguide
IEEE Transactions on Microwave Theory and Techniques, 2000The Green's functions for determining the electromagnetic fields inside a semiinfinite coaxial line due to a radially directed, infinitesimally thin, and short-current element have been derived. In addition to the TEM mode, TE and TM modes are also considered.
null Edward Kai-Ning Yung +2 more
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