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MW Waveguide Loads

Smiths Interconnect supplies waveguide loads and terminations for a variety of applications and environments including medical, space, defense, and commercial applications and are generally available from L to E-Band optimized to handle an appropriate amount of RF power. These devices complement our other range of ferrite circulators and are routinely supplied integrated into our comprehensive range of ferrite isolators.

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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.

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