Approximate Formula for the Phase of the Aperture-Reflection Coefficient of Open-Ended Rectangular Waveguide

2004 ◽  
Vol 52 (1) ◽  
pp. 318-321 ◽  
Author(s):  
K.T. Selvan
Keyword(s):  
Reflection Coefficient ◽  
Rectangular Waveguide ◽  
Approximate Formula

A Magnetic-Controlled Detection System for Radar Absorbing Coatings

2013 ◽  
Vol 718-720 ◽  
pp. 393-398 ◽  
Author(s):  
Jian Hua Zhou ◽  
Li Xia Huo ◽  
Wei Wen Li ◽  
Bai Qiang You ◽  
Yan Long Li ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Rectangular Waveguide ◽  
Detection System ◽  
Solenoid Coil ◽  
Test Fixture ◽  
Field Patterns ◽  
Ku Band

A magnetic-controlled detection system, with a rectangular solenoid coil in a waveguide test fixture, is proposed for radar absorbing coatings. By applying Ku-band rectangular waveguide, the field patterns at different positions, the reflection coefficient S11 and its variation of several coating samples are simulated and measured under current loaded from 0 to 1.0 A. The results show that this detection system is repeatable and stable, and also reliable with the error of less than 10%.

THE REFLECTION OF WAVES IN A GENERALIZED EPSTEIN PROFILE

1965 ◽  
Vol 43 (5) ◽  
pp. 921-934 ◽  
Author(s):  
R. Burman ◽  
R. N. Gould
Keyword(s):  
Refractive Index ◽  
Wave Equation ◽  
Reflection Coefficient ◽  
Approximate Formula ◽  
Reflection And Transmission Coefficients ◽  
Stratified Medium ◽  
Reflection And Transmission ◽  
Transmission Coefficients ◽  
Special Case ◽  
Reflection Of Waves

Epstein (1930) and Rawer (1939) studied the reflection of waves in a stratified medium by transforming the hypergeometric equation into the wave equation. A particular case of the Epstein profile is a symmetrical layer. Considerable attention has been given in the literature to this case as well as to symmetrical layers with certain other profiles of the refractive index. In the present paper a generalized Epstein profile is considered and the reflection and transmission coefficients are obtained. The special case in which the refractive index tends to the same constant value on either side of a layer is then discussed. The symmetrical Epstein profile is a special case of this layer which, in general, is asymmetrical. Particular attention is given to a layer differing only slightly from the symmetrical Epstein layer, a simple approximate formula for the reflection coefficient being derived.

scholarly journals Messung hoher Elektronendichten mit einer neuartigen Mikrowellen-Reflexionssonde an einem linearen z-Pinch

1966 ◽  
Vol 21 (9) ◽  
pp. 1471-1478 ◽  
Author(s):  
H. Hermansdorfer
Keyword(s):  
Reflection Coefficient ◽  
Phase Angle ◽  
Rectangular Waveguide ◽  
Critical Density ◽  
Probe Method ◽  
Local Measurement ◽  
Electron Densities ◽  
Microwave Reflection ◽  
Z Pinch ◽  
Reflection Probe

A microwave reflection probe method allowing the local measurement of electron densities well above the critical density is described. Measurements in the 35 Gc/s band on a z-pinch show its applicability. A rectangular waveguide with a dielectric aperture window serves as a probe. The interferometer for measuring the reflection coefficient is presented. It indicates phase angle and amplitude automatically without using modulators or frequency translators. Electron densities between about 1013 cm-3 and 1016 cm-3 could be measured, facilitated by the transforming action of a dielectric λ/4-window.

Legendre Fit to the Reflection Coefficient of a Radiating Rectangular Waveguide Aperture

2012 ◽  
Vol 60 (8) ◽  
pp. 4009-4014 ◽  
Author(s):  
Dylan F. Williams ◽  
Mohammad Tayeb Ghasr ◽  
Bradley Alpert ◽  
Zhongxiang Shen ◽  
Alexander Arsenovic ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Rectangular Waveguide
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