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SMT Isolators & Circulators

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SMT Isolators & Circulators
  • Variety of frequencies from L to X-Band. 
  • Robust and reliable products available as single junction isolators and circulators or dual junction duplexers.
  • Improved breath of frequency bands serviced, the electrical performance achievable, and extending the peak power handling. 

Smiths Interconnect|TRAK has over a decade’s experience designing and producing Surface Mount Technology, SMT Isolators and Circulator suitable for pick and place and reflow soldering.

Devices have been produced in a variety of frequencies from L to X-band for applications which include communications, commercial avionics and large AESA programs using Surface Mount Technology (SMT).

Over the years the range has continued to expand to ensure designers have access to the widest choice of robust and reliable products available as single junction Isolators & Circulators or dual junction Duplexers.

Recent product development has focused on improving the breadth of the frequency bands serviced, the electrical performance achievable, and extending the peak power handling. These improvements have been delivered by paying particular attention to ferrite selection and magnetic bias combined with improvements in mechanical packaging that aid and assist the re-flow process including device footprint & interface pre-tinning.

This table lists the basic information for a range of typical designs. Electrical specification is dependent on several factors including operating bandwidth, temperature and RF peak power. Please contact the factory for performance data.
Operating Band [GHz]FunctionBase Package Footprint WDH [mm x mm]Power Handling [W Peak]Notes
1.2 to 1.4Circulator25.4 x 25.4 x 7.8450This is a “T” configuration device.
1.2 to 1.4Isolator25.4 x 31.7 x 7.8450Termination rating is specification dependant.
1.2 to 1.4Duplexer25.4 x 59.0 x 7.84503 and 4 access port variants available.
2.7 to 3.3Circulator19.05 x 19.05 x 6.35200A more compact version operating at 40W CW.
2.7 to 3.3Isolator19.05 x 25.4 x 6.35200Termination rating is specification dependant.
2.7 to 3.3Duplexer19.05 x 44.1 x 6.352003 and 4 access port variants available.
2.7 to 3.1Circulator19.05 x 19.05 x 6.35200This is a “T” configuration device.
2.7 to 3.1Isolator19.05 x 25.4 x 6.35200Termination rating is specification dependant.
2.7 to 3.1Duplexer19.05 x 44.1 x 6.35200This is a “T” configuration device.
2.9 to 3.4Isolator19.05 x 19.05 x 6.30200Termination rating is specification dependant.
2.9 to 3.4Circulator19.05 x 25.5 x 6.30200This is a “T” configuration device.
2.9 to 3.4Duplexer19.05 x 46.5 x 6.302003 and 4 access port variants available.
3.1 to 3.5Isolator12.7 x 12.7 x 6.35200This is a “T” configuration device.
3.1 to 3.5Circulator12.7 x 19.05 x 6.35200This is a “T” configuration device.
3.1 to 3.5Duplexer12.7 x 25.4 x 6.352003 and 4 access port variants available.
5.2 to 5.9Circulator12.7 x 12.7 x 5.150This is a “T” configuration device.
5.2 to 5.9Isolator12.7 x 25.4 x 5.150Termination rating is specification dependant.
5.2 to 5.9Circulator12.7 x 24.6 x 5.150This is a “T” configuration device.
8.0 to 12.0Circulator12.7 x 12.7 x 3.550This is a “T” configuration device.
8.0 to 12.0Isolator12.7 x 10.0 x 3.550This is a “T” configuration device.
8.0 to 12.0Duplexer12.7 x 16.0 x 3.550Refer to factory for alternative footprints.
  • Radar altimeter (used in more than 50% of the world's commercial air transport fleet) 
  • AESA applications.