The WC-42-UBR-KF is a professional-grade, high-fidelity Waveguide to Coaxial Adapter meticulously engineered for seamless microwave transitions across the K-band frequency spectrum from 18 GHz to 26.5 GHz. Constructed with a premium lightweight **Aluminum body** and a high-durability **Stainless Steel K-Female (2.92mm) connector**, this adapter delivers superior electrical performance with a maximum VSWR threshold of **1.25**. Utilizing a standard **WR-42 Waveguide** interface combined with a precision **UG-595/U Flange**, it reliably supports continuous power handling up to **280W (CW)**. Expertly designed and manufactured in **Taiwan**, it stands as an indispensable choice for telecommunication engineering, defense electronics calibration, and lab-grade high-frequency instrumentation networks.