Radiation from a rectangular waveguide with a lossy flange

Materials Characterization Using Microwave Waveguide System

“…Then, the measured S 11a_sample was converted to normalized admittance, Y/ Y o parameter by a formula: Y/Y o =( 1− S 11a_sample )/(1 + S 11a_sample ). The SOO calibration techniques were validated by comparing normalized admittance, Y/Y o with the literature data [15][16][17][18][19][20][21][22] as shown in Figure 14. The real part, Re(Y/Y o ), and the imaginary part, Im(Y/Y o ), of admittance results were found to be in good agreement with literature data over the operational range of frequencies.…”

A Multi-Mode Solution for Analysis of the Reflection Coefficient of Open-Ended Rectangular Waveguides Radiating into a Dielectric Infinite Half-Space

“…These errors are primarily due to the exclusion of higher-order modes in the theoretical fonnulation. To remedy this problem several attempts have been made which incorporate the effect of higher-order modes in the derivations [1][2][3][14][15][16][17][18][19][20][21], …”

“…The analytic fonnulation uses Fourier analysis similar to that used in [21], in addition to the forcing of the necessary boundary conditions at the waveguide aperture. In this approach only a set of higher-order modes necessary to obtain convergence is included in the formulation whose contribution will be discussed as a function of the dielectric properties of the infinite half-space, and of the frequency of operation.…”

Microwave nondestructive evaluation of aircraft radomes

“…[Mautz and Harrington, 1978] modeled a waveguide with an infinite flange directed into an infinite half-space. This basic situation was analytically modeled by Yoshitomi and Sharobim [Yoshitomi and Sharobim, 1994]. A number of other works sought analytical solutions to similar situations, including a waveguide directly applied to a lossy finite material with a conductor backing [Stewart and Havrilla, 2006].…”

“…Going a step further in complexity, Baker-Jarvis et al [Baker-Jarvis et al, 1994] analyzed a coaxial probe with an air gap between the probe aperture and a dielectric of finite thickness, terminated by either an infinite dielectric half-space or perfect electric conductor (PEC). An article by Bois et al [Bois et al, 1999], relying heavily on same methods found in [Yoshitomi and Sharobim, 1994], presents the exact situation to be considered herein. However, the derivation presented in [Bois et al, 1999] lacks consistency in formulation and rigor in detail.…”