WR-15 Sliding Matched Termination
The WR-15 Sliding Matched Termination is a precision-engineered waveguide component that features an adjustable absorbing element for isolating and measuring residual reflections in test setups. It is specifically designed for the 50 - 75 GHz frequency range, serving as a critical building block in V-Band infrastructure.
The absorbing wedge is attached to a micrometer. By physically sliding the wedge back and forth, the phase of the termination reflection changes, allowing engineers to mathematically cancel out system errors. WR-15 spans the 50-75 GHz V-Band. Its 0.148" x 0.074" dimensions are the standard for 60 GHz commercial backhaul networks and inter-satellite links (ISL) in low earth orbit constellations.
Key Features
Adjustable Match
Sliding mechanism allows precise positioning of the absorptive element for optimized impedance matching at the target frequency.
Calibration Grade
Designed to calibration kit standards for use as a matched load reference in TRL and other calibration procedures.
Low Residual VSWR
When properly adjusted, achieves very low return loss for accurate reference plane establishment and measurement confidence.
Precision Mechanism
Smooth, low-friction sliding action with precision-machined internal bore for repeatable, accurate adjustments.
V-Band Use Cases
Satellite Cross-links
In-orbit ISL data transfer
60 GHz ISM
Commercial backhaul
Auto Radar Test
Early generation sensors
Radiometry
Earth observation
More Sliding Matched Terminations
Frequently Asked Questions
Why does the termination need to slide?+
No termination is perfect. By sliding the load over at least one-half wavelength, you can observe the phase ripple of the imperfection on a VNA. You can then mathematically separate the reflection of the load from the reflection of the actual device under test.
How is WR-15 used in space applications?+
WR-15 is the standard for Inter-Satellite Links (ISL) in V-Band. Because there is no oxygen in space to absorb the 60 GHz signals, satellites can transmit massive amounts of data to each other using WR-15 feed networks and high-gain antennas without interference from Earth-based signals.
Are WR-15 components difficult to manufacture?+
Yes. At 75 GHz, the wavelength is only 4 millimeters. A manufacturing defect of just 0.1 mm inside a WR-15 component acts as a massive impedance mismatch. All RF Essentials WR-15 products undergo strict metrology and vector network analyzer testing.