Double-Ridged High Power Waveguide Termination

Available in aluminum or copper with high-temperature refractory ceramic absorptive elements. Custom cooling options include natural convection, forced-air, water-cooled, and water-coupled. Wideband coverage from 2 GHz to 40 GHz with low VSWR of 1.10:1–1.25:1 across full band, handling average power up to 7500W continuous wave. Customizable flange types (cover, grooved, UG, CPR, FP series). Ideal for broadband radar systems, satellite ground stations (SATCOM), military and aerospace applications, telecommunication infrastructure, EMC/EMI testing, and high-power RF amplifier validation where reliable termination of high CW power is critical. All welded termination designs meet or exceed MIL-DTL-3954 requirements for waveguide dummy loads.

Double-ridge high-power loads are termination absorbers designed specifically for ultra-wideband, high-power double-ridge waveguide systems. Combining the ultra-wideband characteristics of double-ridge waveguides with the strong heat dissipation, low electric field intensity and high breakdown resistance of high-power load designs, they serve as core components in broadband radar, electronic warfare and broadband communication systems.

Typical Structure (Mainstream Engineering Design)

Double-Ridge Waveguide Cavity

Standard WRD series double-ridge waveguides (WRD-180, WRD-250, etc.).

Materials: aluminum (6061), copper (high heat flux), stainless steel (high-power applications).
Core Absorber (Key Component)
- Symmetric double-ridge tapered absorber: tapered along the ridge direction, made of silicon carbide (SiC), high-loss ceramic or graphite composite material.
- Stepped / tapered resistive sheets: multiple sheets arranged along the ridge to distribute power and heat.
- Filled absorbing medium: wideband and highly stable, but with relatively weaker heat dissipation.
Heat Dissipation System (Characteristic of High-Power Design)
- Air-cooled type: housing with dense heat dissipation fins + forced fan (1–10 kW level).
- Liquid-cooled type: internal water-cooling channels / water jacket (10 kW to MW level).
- Natural cooling: only used for low-power applications ≤ 100 W.
Terminal Short-Circuit / Absorption Cavity

The end of the absorber is connected to a short-circuit plate for secondary absorption of residual energy.

Non-twistable flexible waveguides Specifications