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Low insertion loss, 1mm adapters available, full waveguide band operation, frequency ranges 12.4 to 110 GHz.

For further information, please contact us at



Specifications and Ordering

Our designs are built onsite and upon request. We tailor each order through our sales engineers to better serve your purchase.


QuinStar’s QWA series waveguide to coax adapters allow efficient transition from rectangular waveguide to a coaxial connector. Full waveguide band adapters are available from 12.4 – 110 GHz in Ku through W bands. Coaxial connector types available include SMA, 2.0 mm, 2.4 mm, 1.85 mm, and 1.0 mm connectors based on the applicable frequency range. In addition, QWA is available with either male or female connectors and a round or square flange pattern.

We offer two mechanical configurations for the interfaces: right angle and end launch. Further, we construct the end-launch or in-line versions of the adapters so that the waveguide port and the coaxial connector are in line with each other.

The key features of QWA adapters are exceptionally low insertion loss and low VSWR.

If our standard options do not meet your requirements, contact to discuss a custom product.

Low Insertion Loss
1mm Adapters Available
Full Waveguide Band Operation
Frequency Ranges 12.4 to 110 GHz

These adapters are compact. They are especially useful where right-angle adapters are not mechanically suitable. For example, vector network analyzer testing for filters, attenuators, etc.

Ordering Information


Contact us at for ordering information or submit an RFQ.