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Description & Specification
WR-42 Waveguide to Coaxial Adapter
Precision K-Band Transition | Standard UG-595/U Flange | 18.0 GHz – 26.5 GHz
The WC-42-UBR-KM is a high-precision microwave Waveguide to Coaxial Adapter professionally engineered for precise K-band transitions within the 18.0 GHz to 26.5 GHz frequency spectrum. Optimized for high-frequency signal processing networks, professional Signal Security tracking arrays, and mission-critical Signal Defense evaluations, this premium adapter enables low-loss mode conversion between rectangular waveguide tracks and coaxial assemblies. It features an optimized internal launch geometry that delivers a highly linear impedance matching profile with a low maximum V.S.W.R of 1.25 : 1. Fully designed and manufactured in Taiwan, this ultra-lightweight 30g component pairs a ruggedized UG-595/U (UBR 220) flange interface with a premium, wear-resistant Stainless Steel 2.92mm K-Male coaxial connector port, safely managing up to 280 Watts (CW) of continuous wave power in demanding instrumentation cells.
Electrical & RF Performance
| Frequency Range | 18.00 GHz to 26.50 GHz (K-Band Spectrum) |
| V.S.W.R (Max Profile) | ≤ 1.25 : 1 |
| Maximum Power Handling | 280 Watts (CW Continuous Wave) |
| Waveguide Cutoff Frequency | Lowest Dominant Mode: 14.051 GHz | Upper Mode Boundary: 28.102 GHz |
| Nominal Impedance | 50 Ohms |
Mechanical & Construction Data
| Waveguide Size Standard | EIA WR-42 (R220 / WG20 Layout) |
| Waveguide Internal Dimensions | 10.668 mm x 4.318 mm |
| Waveguide Flange Designation | UG-595/U Style Layout (UBR 220 Flat Cover) |
| Coaxial Connector Interface | 2.92mm K-Male Port (Premium Grade SUS303 Stainless Steel) |
| Physical Dimensions (W x H x L) | 36.5 x 22.4 x 33 mm |
| Net Weight | 30 g (Ultra-Lightweight Micro-Format) |
| Body Material Profile | High-Grade Precision Machined Aluminum Alloy |
| Manufacturing Origin | Taiwan Design & Made in Taiwan (FT-RF) |
280W High-Power Domination
Precision-engineered to handle massive continuous wave power loads up to 280W, providing a robust coupling interface for intensive laboratory evaluation and high-intensity transmission networks.
Precision Signal Integrity
Optimized internal transition geometry effectively eliminates mode reflections, ensuring a maximum V.S.W.R profile of 1.25 across the full multi-octave K-Band operating spectrum.
Taiwanese Engineering Excellence
Precision designed and manufactured in Taiwan under strict industrial quality control standards, ensuring exceptional mechanical tolerances, flat alignment, and enduring calibration tracking.
Industrial Grade Build
Fully machined from aerospace-grade aluminum with a passivated stainless steel 2.92mm interface, providing superior structural wear resistance and repeatable performance over standard brass links.
Request a Professional Quote
Contact our technical engineering team today to obtain certified individual V.S.W.R plots, custom flange drilling patterns, specialized non-reflective treatments, or alternative connector pairings.
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| Frequency Range: | 18 GHz to 26.5 GHz |
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WR42 Waveguide to coaxial adapter, 18 to 26.5GHz, End Launch K-Female Connector, Flange:PBR
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| Frequency Range: | 18 - 26.5 GHz |
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WC-42-UBR-SF
WR42 18GHz to 26.5GHz SMA- Female Connector Waveguide Coaxial Adapter Flange: type01
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| Frequency Range: | 18.0 GHz - 26.5 GHz |
| Waveguide Type: | WR-42 (K-Band) |
| Flange / Connector: | UG-595/U / SMA-F |
| Max Power (W): | 280W |
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| 2026/06/15 | |
