Double Ridge Straight Waveguide

Aluminum / copper with silver-plated inner walls for low high-frequency loss, equipped with standard flanges (CPR/UG) at both ends.

Double-Ridged Straight Waveguide Section is a wideband variant of the standard rectangular waveguide. Its core structure features two symmetric metal ridges protruding inward from the broad inner walls, extending straight along the axial direction. By sacrificing part of the power capacity and introducing slightly higher loss, it achieves an extremely wide single-mode bandwidth, typically 2:1 ~ 4:1, far exceeding that of conventional rectangular waveguides, making it the preferred transmission line for ultra-wideband systems.

Structure and Geometric Parameters

Outline: Standard rectangular waveguide outer housing with outer width a and outer height b.

Internal Ridges: One symmetric ridge at the center of the top and bottom broad walls respectively, running through the full length.

Key Dimensions:

a: Outer broad wall dimension, consistent with standard waveguides

b: Outer narrow wall dimension

s: Ridge width, generally 30%~50% of a

h: Ridge height, which determines the gap g = b – 2h

g: Gap between ridges; smaller value results in lower cutoff frequency and wider bandwidth

Material: Aluminum / copper with silver-plated inner walls for low high-frequency loss, equipped with standard flanges (CPR/UG) at both ends.

Double Ridge Straight Waveguide Specifications