Part II Implementation - FEniCS Project

Electromagnetic Waveguide AnalysisMagnitude [dB]0§20§15§10§5§160§140§120§100§80§6010 11 12 13 14 15Frequency [GHz]Phase [degrees]Figure 34.11: Magnitude (solid line) and phase (dashed line) of the transmissioncoefficient (S 21 ) of a length of rectangular waveguide with dimensionsa = 18.35mm, b = 9.175mm, and l = 10mm. The analytical results for the samestructure are indicated by markers with and • indicating the magnitude andphase respectively.rectangular for example, or calculated with methods such as those discussed inthe preceding sections [?].Transmissionparameter(S 21 )resultsforalengthofhollowrectangularwaveguideare shown in Figure 34.11. As expected, the length of guide behaves as afixed value phase shifter [?] and the results obtained show excellent agreementwith the analytical ones.ddcport 1wport 2acsFigure 34.12: Schematic of an H-plane iris in a rectangular waveguide dimensions:a = 18.35mm, c = 4.587mm, d = 1mm, s = 0.5mm, and w = 9.175mm. Theguide has a height of b = 9.175mm. The ports are indicated by dashed lines onthe boundary of the device.306