WR-03 Straight Waveguide
The WR-03 Straight Waveguide is a precision-engineered waveguide component that provides ultra-low loss linear signal transmission for bridging gaps in RF systems. It is specifically designed for the 220 - 330 GHz frequency range, serving as a critical building block in J-Band infrastructure.
Straight waveguide sections are drawn or electroformed to exact tolerances, providing a pure, unperturbed environment for dominant TE10 mode propagation over fixed distances. Operating in the extreme J-Band (220-330 GHz), WR-03 is the absolute cutting edge of commercial waveguide technology. The 0.034" x 0.017" aperture is thinner than a credit card, requiring flawless electroforming.
Key Features
Low Insertion Loss
Engineered for minimal insertion loss and excellent Voltage Standing Wave Ratio (VSWR) across the full J-Band.
Gold Plated Finish
Gold plating provides superior corrosion resistance and ensures long-term signal reliability in demanding environments.
OFHC Copper Body
Oxygen-free high conductivity copper waveguide body with precision-machined brass flanges for superior performance.
Custom Lengths
Available in standard lengths. Custom dimensions manufactured to your exact system requirements on request.
Common Use Cases
ALMA Telescope
Sub-millimeter astronomy
THz Spectroscopy
Molecular rotational sensing
Material Science
Dielectric characterization
Medical Imaging
Non-ionizing THz scanners
More Straight Waveguides
Frequently Asked Questions
Why use a straight waveguide instead of coaxial cable?+
At millimeter-wave frequencies, coaxial cables suffer from extreme dielectric loss and radiation leakage. A hollow straight waveguide removes the center conductor and dielectric, reducing insertion loss by over 80% compared to a coax cable.
What is the physical size of the WR-03 opening?+
The internal hole of a WR-03 waveguide is 0.034 inches by 0.017 inches (0.86 mm by 0.43 mm). It is so small that a standard mechanical pencil lead cannot fit inside it. Dust particles alone can severely ruin the VSWR.
Why is gold plating mandatory on WR-03?+
At 300 GHz, the skin depth of the RF signal is less than 0.1 micrometers. The signal travels exclusively on the very outer layer of atoms on the waveguide wall. Even a microscopic layer of copper oxidation will completely absorb the terahertz wave, making non-oxidizing gold plating absolutely mandatory.