Precision measurement of complex reflection coefficients of electromagnetic waves in rectangular waveguides

1991 ◽  
Vol 34 (11) ◽  
pp. 1166-1167
Author(s):  
E. G. Alyab'ev ◽  
O. F. Kiselev ◽  
A. V. Myl'nikov ◽  
V. D. Frumkin ◽  
B. A. Khvorostov ◽  
...  
Keyword(s):  
Precision Measurement ◽  
Electromagnetic Waves ◽  
Reflection Coefficients ◽  
Complex Reflection ◽  
Rectangular Waveguides

scholarly journals Non-destructive Dielectric Measurements and Calibration for Thin Materials Using Waveguide-Coaxial Adaptors

2014 ◽  
Vol 14 (1) ◽  
pp. 16-24 ◽  
Author(s):  
K. Y. You ◽  
Z. Abbas ◽  
M. F. A. Malek ◽  
E. M. Cheng
Keyword(s):  
Calibration Method ◽  
Calibration Procedure ◽  
Reflection Coefficients ◽  
Dielectric Measurements ◽  
Finite Samples ◽  
Open Standard ◽  
Rectangular Waveguides ◽  
Standard Values ◽  
Calibration Techniques ◽  
Non Destructive

Abstract This paper focuses on the calibration of apertures for rectangular waveguides using open-short-load (OSL) standards and transmission-line (TL) approaches. The reflection coefficients that were measured using both calibration techniques were compared with the coefficients acquired using the thru-reflect-line (TRL) method. In this study, analogous relationships between the results of OSL calibration and TL calibration were identified. In the OSL calibration method, the theoretical, open-standard values are calculated from quasi-static integral models. The proposed TL calibration procedure is a simple, rapid, broadband approach, and its results were validated by using the OSL calibration method and by comparing the results with the calculated integral admittance. The quasi-static integral models were used to convert the measured reflection coefficients to relative permittivities for the infinite samples and the thin, finite samples

scholarly journals On the multipath effects due to wall reflections for wave reception in a corner

Noise Mapping ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 41-64
Author(s):  
Luiz Manuel Braga da Costa Campos ◽  
Manuel José dos Santos Silva ◽  
Agostinho Rui Alves da Fonseca
Keyword(s):  
Electromagnetic Waves ◽  
Double Series ◽  
Two Dimensions ◽  
Reflection Coefficients ◽  
Urban Air ◽  
Interference Effects ◽  
Direct Signal ◽  
Total Signal ◽  
Spectral Bands ◽  
Multipath Effects

Abstract Multipath effects occur when receiving a wave near a corner, for example, the noise of an helicopter or an aircraft or a drone or other forms of urban air mobility near a building, or a telecommunications receiver antenna near an obstacle. The total signal received in a corner consists of four parts: (i) a direct signal from source to observer; (ii) a second signal reflected on the ground; (iii) a third signal reflected on the wall; (iv) a fourth signal reflected from both wall and ground. The problem is solved in two-dimensions to specify the total signal, whose ratio to the direct signal specifies the multipath factor. The amplitude and phase of the multipath factor are plotted as functions of the frequency over the audible range, for various relative positions of observer and source, and for several combinations of the reflection coefficients of the ground and wall. It is shown that the received signal consists of a double series of spectral bands, in other words: (i) the interference effects lead to spectral bands with peaks and zeros; (ii) the successive peaks also go through zeros and “peaks of the peaks”. The results apply not only to sound, but also to other waves, e.g., electromagnetic waves using the corresponding frequency band and reflection factors.

Probing Complex Reflection Coefficients in One-Dimensional Surface Plasmon Polariton Waveguides and Cavities Using STEM EELS

Nano Letters ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 120-126 ◽  
Author(s):  
David T. Schoen ◽  
Ashwin C. Atre ◽  
Aitzol García-Etxarri ◽  
Jennifer A. Dionne ◽  
Mark L. Brongersma
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Reflection Coefficients ◽  
One Dimensional ◽  
Complex Reflection ◽  
Plasmon Polariton ◽  
Dimensional Surface

Phase-demodulation error of a fiber-optic Fabry–Perot sensor with complex reflection coefficients

2000 ◽  
Vol 39 (9) ◽  
pp. 1382 ◽  
Author(s):  
James M. Kilpatrick ◽  
William N. MacPherson ◽  
James S. Barton ◽  
Julian D. C. Jones
Keyword(s):  
Fiber Optic ◽  
Reflection Coefficients ◽  
Complex Reflection ◽  
Fabry Perot ◽  
Phase Demodulation

scholarly journals Взаимодействие электромагнитной H-волны с тонкой металлической пленкой на диэлектрической подложке в случае анизотропной поверхности Ферми металла

2019 ◽  
Vol 127 (8) ◽  
pp. 306
Author(s):  
И.А. Кузнецова ◽  
Д.Н. Романов ◽  
А.А. Юшканов
Keyword(s):  
Fermi Surface ◽  
Effective Mass ◽  
Free Path ◽  
Electromagnetic Waves ◽  
Metal Film ◽  
Mean Free Path ◽  
Thin Metal Film ◽  
Thin Metal ◽  
Reflection Coefficients ◽  
Conduction Electrons

The interaction of electromagnetic H-waves with the thin metal film subject to the shape of the ellipsoidal Fermi surface and a constant mean free path of electrons for various angles of incidence of the electromagnetic waves of theta and different from each other of the coefficients of specularity of q1 and q2 in the reflection of electrons from surfaces of the film is calculated. The metal film is enclosed between two media with permittivity ε1 and ε2. The behavior of reflection coefficients R, passage T and absorption A from the effective mass of conduction electrons is analyzed.

Ellipsometric analysis of inhomogeneous structures on the basis of complex reflection coefficients

1986 ◽  
Vol 177 (3) ◽  
pp. 625-641 ◽  
Author(s):  
R.I. Lubinskaya ◽  
A.S. Mardezhov ◽  
K.K. Svitashov ◽  
V.A. Shvets
Keyword(s):  
Reflection Coefficients ◽  
Complex Reflection
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