September 4, 2025

Standard rectangular waveguides, e.g., WR-90 (22.86×10.16mm), operate in TE10 mode (cutoff λ=2a) with <0.05dB/m loss at 10GHz, VSWR<1.1 in copper designs, ensuring efficient microwave transmission. ​​Shape and Standard Sizes​​ Unlike a simple pipe, a standard rectangular waveguide is not square; its ​​internal width (a)​​ is always precisely twice its ​​internal height (b)​​, creating a classic […]

The rectangular waveguide behaves as a high-pass filter due to its cutoff frequency characteristics. When the operating frequency is lower than the cutoff frequency (such as c/(2a) for the TE10 mode), electromagnetic waves cannot propagate. When it is higher than the cutoff frequency, it can be effectively transmitted. It is often used in microwave communication