Aufbau eines ESR-Superheterodyne-Spektrometers, geeignet für Mikrowellen-Transmissions-Messungen an Metallen / ESR Microwave Transmission Measurements on Metals

A two cavity microwave transmission experiment was carried out at a frequency of 9,3 · 199 cycles/sec. A transmission resonance signal was observed through thin sheets of the paramagnetic metals Lithium and Gadolinium when placed as a common wall between the two cavities. The microwave part of the ESR-spectrometer is described and experimental results are given.

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A Tomograph Prototype for Quantitative Microwave Imaging: Preliminary Experimental Results

Journal of Imaging ◽

10.3390/jimaging4120139 ◽

2018 ◽

Vol 4 (12) ◽

pp. 139 ◽

Cited By ~ 1

Author(s):

Alessandro Fedeli ◽

Manuela Maffongelli ◽

Ricardo Monleone ◽

Claudio Pagnamenta ◽

Matteo Pastorino ◽

...

Keyword(s):

Ad Hoc ◽

Microwave Imaging ◽

Experimental Results ◽

Network Analyzer ◽

Reconstruction Algorithms ◽

Quantitative Reconstruction ◽

Qualitative And Quantitative ◽

Switching Matrix ◽

3D Printed ◽

Transmission Measurements

A new prototype of a tomographic system for microwave imaging is presented in this paper. The target being tested is surrounded by an ad-hoc 3D-printed structure, which supports sixteen custom antenna elements. The transmission measurements between each pair of antennas are acquired through a vector network analyzer connected to a modular switching matrix. The collected data are inverted by a hybrid nonlinear procedure combining qualitative and quantitative reconstruction algorithms. Preliminary experimental results, showing the capabilities of the developed system, are reported.

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The Study of Oxygen Thermal Donors in Silicon by Photothermal Ionisation Spectroscopy

MRS Proceedings ◽

10.1557/proc-59-139 ◽

1985 ◽

Vol 59 ◽

Cited By ~ 1

Author(s):

Jennifer A. Griffin ◽

H Navarro ◽

L Genzel

Keyword(s):

Effective Mass ◽

Excited States ◽

Spectral Region ◽

Experimental Results ◽

Transition Series ◽

Ir Transmission ◽

Transmission Measurements ◽

Oxygen Atoms

ABSTRACTIt is well known that Czochralski-grown silicon contains up to 2×1018 cm-3 oxygen atoms. When this silicon is annealed at 450°C a series of “thermal” donors are formed. In this work we present the results of a study of annealed Czcochralski-silicon samples by Photothermal Ionisation Spectroscopy and IR transmission measurements. All previously reported thermal donors, which occur in the spectral region above 330cm-1, and hove ionisation energies 53–69.3 meV, are observed by us. Also, our experimental results show the presence of at least three previously unreported thermally formed donor transition series below 330cm-1. Our results indicate that the ionisation energies of these new shallow thermal donors would be 36.3, 37.0 and 37.4 meV. Assignments are made by comparison of the energy differences between excited states to those predicted by the Effective Mass Theory.

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Microwave transmission measurements for estimation of the weight of standing pine trees

IRE Transactions on Antennas and Propagation ◽

10.1109/tap.1979.1142046 ◽

1979 ◽

Vol 27 (1) ◽

pp. 22-26 ◽

Cited By ~ 5

Author(s):

W. Stutzman ◽

F. Colliver ◽

H. Crawford

Keyword(s):

Microwave Transmission ◽

Pine Trees ◽

Transmission Measurements

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A monostatic microwave transmission experiment for line integrated precipitation and humidity remote sensing

Atmospheric Research ◽

10.1016/j.atmosres.2013.05.014 ◽

2014 ◽

Vol 144 ◽

pp. 57-72 ◽

Cited By ~ 14

Author(s):

Christian Chwala ◽

Harald Kunstmann ◽

Susanne Hipp ◽

Uwe Siart

Keyword(s):

Remote Sensing ◽

Transmission Experiment ◽

Microwave Transmission

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Determining moisture content of wheat with an artificial neural network from microwave transmission measurements

IEEE Transactions on Instrumentation and Measurement ◽

10.1109/19.728803 ◽

1998 ◽

Vol 47 (1) ◽

pp. 123-126 ◽

Cited By ~ 19

Author(s):

P.G. Bartley ◽

S.O. Nelson ◽

R.W. McClendon ◽

S. Trabelsi

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Moisture Content ◽

Microwave Transmission ◽

Transmission Measurements ◽

Artificial Neural

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Measuring the Permeability of Rubber to Various Gases

Rubber Chemistry and Technology ◽

10.5254/1.3539517 ◽

1940 ◽

Vol 13 (2) ◽

pp. 326-347 ◽

Cited By ~ 5

Author(s):

A. S. Carpenter ◽

D. F. Twiss

Keyword(s):

Temperature Control ◽

Test Piece ◽

Diffusion Constant ◽

Experimental Methods ◽

Experimental Results ◽

Thin Sheets ◽

Accurate Temperature ◽

Accurate Temperature Control ◽

And Diffusion

Abstract The rate at which a gas passes through a sheet of rubber-like material and the rate at which a gas is absorbed by a block of the material both depend on the same factors, solubility and diffusion constant. The magnitude of these factors can be measured by absorption experiments carried out under specified conditions and the results can be used to assess the permeability of the material in sheet form. Experimental methods and suitable apparatus are described for following absorption and the manner of interpreting the results in terms of permeability is given. Besides such advantages as accurate temperature control, convenient size and ease of handling of the apparatus, the small size of the test-piece, and the elimination of the difficulty of producing uniform thin sheets free from pinholes, the method has the advantage that both factors, solubility and diffusion constant, can be assessed independently; this is not normally possible with direct permeation measurements. Some experimental results are tabulated.

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