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Description & Specification
WC-28-UBR-A2-KF WR-28 Waveguide to Coaxial Adapter
Ka-Band Precision Transition | 26.5 - 40.0 GHz | Model: WC-28-UBR-A2-KF
The WC-28-UBR-A2-KF is a precision Ka-band waveguide to coaxial adapter professionally engineered and manufactured by Fei Teng Wireless Technology Co., Ltd. (FT-RF) in Taiwan. Operating across the 26.5 GHz to 40.0 GHz spectrum, it provides an efficient transition between standard WR-28 rectangular waveguides and 50-ohm 2.92mm (K-type) coaxial transmission lines. Designed with tight mechanical tolerances, it delivers a low maximum VSWR of 1.25:1 with exceptional repeatability. Featuring a lightweight aluminum body with an integrated square UBR flange (UG-599/U pattern) and a passivated stainless steel K-Female connector, it handles up to 20W CW / 400W Peak power, making it an essential component for satellite communications, 5G test beds, and precision laboratory RF measurements.
Technical Specifications
| Frequency Range | 26.5 - 40.0 GHz |
| Waveguide Size | WR-28 (WG22 / R320) |
| Flange Type | UBR (UG-599/U Compatible Square Flange) |
| Connector Interface | 2.92mm K-Female |
| Impedance | 50 Ω |
| V.S.W.R (Max) | 1.25 : 1 |
| Continuous Power (CW) | 20 Watts |
| Peak Power Handling | 400 Watts |
Mechanical & Physical Data
| Dimensions (L x W x H) | 26.55 x 19.10 x 30.00 mm |
| Component Weight | 11 g (Estimated ~10.64 g) |
| Body Material | Aerospace Aluminum Alloy (Surface Treated) |
| Connector Material | Passivated Stainless Steel |
| Country of Origin | Taiwan |
Insertion Loss Calibration Plot
Calibration in Progress
Laboratory measurement data pending official upload. Available upon request.
VSWR Performance Curve
Calibration in Progress
Laboratory measurement data pending official upload. Available upon request.
Return Loss Calibration Plot
Calibration in Progress
Laboratory measurement data pending official upload. Available upon request.
Key Design & Feature Highlights
Tight Mechanical Tolerance
Precision CNC machined structure ensures low insertion loss and reliable signal transition across Ka-band.
Stainless Steel K-Connector
Premium 2.92mm K-Female interface provides maximum mechanical durability and repeatable testing cycles.
Aerospace Aluminum Body
Lightweight aluminum construction with specialized surface passivation for superior conductivity.
Taiwanese Precision
Engineered and manufactured in Taiwan to meet international microwave metrology and testing standards.
Contact FT-RF Engineering Division
Contact our technical engineering division today to request official quotes or customized mounting solutions.
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