High Power Water-Cooled Loads

Product Introduction:​​

Dolph Microwave High Power Water-Cooled Waveguide Loads are engineered microwave termination solutions designed for demanding applications requiring exceptional power handling and heat dissipation. Utilizing internal water circulation, these loads reliably absorb and dissipate high levels of RF/microwave energy (up to 150 kW average power) to protect sensitive components.

Constructed with ultra-high temperature ​​refractory ceramic​​ absorbers housed within robust ​​welded aluminum​​ structures, they deliver unmatched durability and thermal efficiency. Manufactured to ​​MIL-D-3954​​ standards, Dolph loads provide consistent VSWR performance ≤ 1.2:1 across specified waveguide bands from WR975 down to WR28.

​​Key Features and Benefits:​​

Dolph Microwave water-cooled waveguide loads excel through a combination of robust engineering and optimized thermal management. Central to their performance is an ​​ultra-high temperature refractory ceramic​​ microwave absorber, ensuring stable absorption characteristics even under intense thermal loads.

This critical component is housed within a precision ​​welded aluminum structure​​, designed to maximize thermal conductivity and cooling efficiency while maintaining excellent ​​mechanical strength​​. Internal water flow provides exceptional heat dissipation capabilities, significantly enhancing ​​average power handling​​ (up to 150 kW) far beyond air-cooled alternatives, resulting in a ​​very low cost per kilowatt​​.

The design includes an ​​integrated fine matcher​​ at the input for optimal impedance matching, minimizing reflected power. Cooling interfaces feature standardized ​​Push-in fitting QS or NPT​​ connections for reliable coolant integration. All materials contacting the coolant are rigorously selected for safety and compatibility.

The ​​Silicone-based Pyromark 1200​​ flat black coating ensures superior thermal radiation and protection. Compliant with ​​MIL-D-3954​​, these loads meet stringent military-grade performance specifications. Optional corrosion protection (​​Surtec​​) and polished flanges are standard, with custom finishes available upon request.

​​Primary Applications:​​

These water-cooled loads are indispensable in environments demanding termination of high RF power. Critical uses include ​​high-power RF system protection​​ where absorbing transmitter energy is essential for safety and equipment longevity.

They are widely utilized in advanced ​​research and high-energy physics devices​​ such as particle accelerators and plasma heating systems. ​​Industrial microwave equipment​​ relying on consistent, high-power sources for processing also depends on these robust terminations.

Additionally, they serve a vital role in ​​test and measurement​​ setups for amplifiers, transmitters, and microwave sources, where accurate, low-VSWR loading is required to validate performance under operational conditions.