RF Waveguide Loads

Features & Benefits

The power handling of the loads and terminations depends on the application and the cooling methodology. All loads operating about a few Watts require to be cooled using methods appropriate to the application and environment. Popular cooling methods are conduction (through the waveguide flange or on a mounting cold plate, natural and forced air convection, liquid cooling and those utilizing combined methods.
All products are produced using highly controlled manufacturing processes and utilise materials suitable for the operating environment and can be customized to incorporate a variety of flange details. Designs are subjected to rigorous thermal and dynamic analysis and where appropriate, and within the limit of our in-house capability, can be tested at operational average RF powers at seas-level, under vacuum or at partial pressure conditions.
Specific features

Optimized electrical performance over the assigned band.
EMC shielded by design.
High power variants subjected to in house qualification and or rigorous thermal and mechanical analysis.
Water cooled variants designed using double skinned stainless steel (turbulent flow) “water” jackets and are subjected to 100% overpressure tests
Proprietary thin film or bulk absorbers used depending on application
Can be integrated with power sensors
Field replaceable connectors used wherever practical

Primary operating band	Waveguide aperture	Low power terminations	High power, conduction cooled loads	High power, convection cooled loads	High power, liquid cooled loads
L-Band	WR650	✓	✓	✓	✗
S-Band	WR340, WR284, & WR229	✓	✓	✓	✓
C-Band	WR187	✓✓	✓✓	✓	✓
	WR137	✓✓	✗	✗	✗
X-Band	WR112 & WR90	✓✓	✓✓	✓	✓
Ku-Band	WR75	✓✓	✓✓	✓	✗
	WR62	✓✓	✓✓	✗	✗
K-Band	WR51 & WR42	✓✓	✓✓	✗	✗
Ka-Band	WR34	✓✓	✓✓	✗	✗
	WR28	✓✓	✓✓	✓	✗
Q-Band	WR22	✓✓	✓✓	✗	✗
V-Band	WR19	✓✓	✓✓	✗	✗
E-Band	WR12	✓✓	✓✓	✗	✗

Smiths Interconnect a substantial range of products providing loads and terminations as components and integrated with ferrite circulators. Products marked by “✓✓” table have space heritage. For an up-to-date picture of the space heritage and capability or a copy of the most recent EQSR contact the factory or your local representative.