Triply-ridged circular waveguides

Abstract

Ridged waveguide is a classic arrangement utilized in broadband microwave components. An analysis of triply-ridged waveguide, presented here, indicates that the dominant mode consists of a degenerate pair. Degenerate mode pairs are widely used in phase shift and control applications. It also exhibits single mode bandwidth characteristics more favorable than the conventional quadrupally-ridged cross-section. Modal hierarchy and field patterns are provided through the use of a finite element solver. Experimental results obtained from a triply-ridged cavity are also discussed and compare well with the numerical calculations.

Efficient boundary integral‐resonant mode expansion method implementation for full‐wave analysis of passive devices based on circular waveguides with arbitrary perturbations

“… Modal chart of a multi‐ridge circular waveguide a Dimensions of the multi‐ridged circular waveguide as well as the circular and square contours used by the BI–RME method b Cut‐off frequency for the first two TE modes and the first TM mode of the multi‐ridge circular waveguide for different insertion depths a . Simulations are compared with Balaji and Vahldieck [16] and measurements of Dillon and Gibson [17]…”

“…The results of these simulations can be seen in Fig. 3b, where the cut-off frequencies for the first two TE modes and the first TM mode have been computed and successfully compared with [16] and the measurements of [17]. For low order modes, as the ones considered in Fig.…”

“…The main reason for this important improvement is that the number of segmented portions (red portions in Fig. 3a) is smaller since the majority of the segments are coincident with the outer circular contour, Theoretical [Balaji, 1996] Measurements [Dillon, 1995] a) b) Fig. 3. a): Dimensions of the multi-ridged circular waveguide as well as the circular and square contours used by the BI-RME method.…”

Ray-Optics Analysis of Single Mode Condition for Optical Waveguides With Rectangular Cross-Section

“…Optical waveguides with a wide variety of shapes have been studied during the past decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. As one of the most basic structures among them, rectangular waveguides undoubtedly attracted the attention of early researchers.…”