Cutoff Wavelengths of Waveguides with Unusual Cross Sections (Correspondence)

Determining Waveguide Cutoff Numerically Using a Novel Method for Cross-Sectional Segmentation

“…It is to be contrasted with an earlier attempt by Pyle and Angley [1] to solve this problem using an approximating cascade of parallel plate lines in which the constraint that this places on the electric eld geometry leads to an irreducible residual error that cannot be removed by ner segmentation. The problem is an old one for which there has long existed an analytic solution and per se the result obtained here tells us nothing new.…”

“…As part of an exercise aimed at obtaining design data for waveguide polarisers, Pyle and Angley [1] used a numerical method to determine the cuto¬s of the principal modes in truncated circular waveguide. 112 …”

Photonic choke-joints for dual-polarization waveguides

“…Several waveguide PC] parameters were studied to obtain the minimum power leakage over a large bandwidth. By scaling the optimal dimensions by the guide cutoff frequency this design approach can be applied to other dual-polarization guided wave structures [7]. Although we have also investigated the use of this technique for circular guide we present only the results for square cross-section guides in the interest of brevity.…”

A Low Cross-Polarization Smooth-Walled Horn With Improved Bandwidth

“…A five section constant cutoff transition from rectangular waveguide (WR 22.4, f, = 26.36 GHz) to circular waveguide [20] was used to mate the feedhorn to the rectangular waveguide of the antenna range infrastructure. The constant cutoff condition was maintained in the transition by ensuring acircle = abroadwalisll/7 where aczrcle is the radius of the circular guide, abroadwall is the width of the broadwall of the rectangular guide, and s ll N 1.841 is the eigenvalue for the TEll mode [21]. The alignment of the circular waveguide feed interface was maintained to avoid degradation of the cross-polar antenna response.…”