Meaning
Standardized designation for rectangular waveguide tubing and associated flanges that operate in the W-band millimeter-wave frequency range from 75 gigahertz to 110 gigahertz. The wr-10 standard represents the physical dimensions of the waveguide, where the internal width is 0.10 inches and the height is 0.05 inches. Devices utilizing this standard are widely used in automotive radar, high-speed backhaul radio links, and atmospheric remote sensing equipment.
Dimensional Standard
Precision milling and tight mechanical tolerances are required to manufacture wr-10 components due to the small wavelengths involved. The internal dimensions dictate the cutoff frequency below which signals cannot propagate through the waveguide. Aluminum or gold-plated brass is used for construction to minimize wall resistance and prevent oxidation over time.
Signal Propagation
Millimeter-wave signals propagate through the hollow tube with low attenuation compared to coaxial cables of equivalent length at these high frequencies. The wr-10 format is optimized for the W-band, ensuring that only the dominant transverse electric mode propagates to avoid signal distortion. This characteristic is critical for maintaining phase stability in high-resolution imaging applications.
Testing Application
Calibration kits and reference antennas utilize this standard to verify the performance of millimeter-wave chips during production. This ensures that the test interface matches the production transceiver, reducing measurement uncertainty.
