RF Waveguide Termination, WR-90, UBR-100, 750 W, 8.20-12.5 GHz (X Band)

DLW90-U100-750 is a high-power WR-90 RF waveguide termination for X Band applications, covering 8.20 to 12.5 GHz with an average input power rating of 750 W at 25 °C and a peak power of 10 kW.

This high-power termination is designed to absorb RF energy on unused ports or end sections in waveguide systems, helping reduce reflections and support stable line operation. The datasheet specifies a maximum VSWR of 1.2, while the aluminum heat sink clearly positions this model in the high-power WR-90 category.

Key features

• Model: DLW90-U100-750
• Product type: high-power RF waveguide termination
• Waveguide size: WR-90 (R100)
• Frequency range: 8.20-12.5 GHz
• Average input power: 750 W @ 25 °C
• Peak power: 10 kW
• VSWR: 1.2 max
• Flange type: IEC UBR100
• Waveguide material: aluminum
• Waveguide finish: black painted
• Heat sink material: aluminum
• Heat sink finish: black painted
• Operating temperature: -40 °C to +70 °C

System role

The DLW90-U100-750 is suitable for terminating unused WR-90 ports and end sections in X Band microwave systems that require both high average power handling and meaningful thermal dissipation. Comparable products are commonly described in the market as waveguide terminations, waveguide loads or dummy loads, depending on the application context.

Application context

This model can be integrated into test benches, radar-related subsystems, microwave infrastructure and RF distribution chains based on standard WR-90 interfaces. Its finned heat sink immediately identifies it as a high-power solution rather than a compact low-power termination.

Mechanical information

The technical drawing shows a finned heat sink and the main body geometry, including an overall length of about 249 mm, a top-view heat sink length of about 199 mm, and an envelope in the 120 to 131 mm range depending on the view.