Radiometer Front-Ends

Spacek Labs Radiometer Front-ends are available in frequencies from 18 to 110 GHz. Our Radiometers are offered in bandwidths spanning a frequency range from less than 1 GHz to 10 GHz. We typically use a dual junction isolator at the input followed by a 20 dB cross-guide coupler. A noise source requiring about 15 mA of bias is on the coupled arm. This assembly feeds one of our low noise receivers. While we offer a lineup of standard Radiometer designs, we more often are designing and building systems to meet our customers needs whether those needs are to fit their electrical, mechanical or pricing requirements.

Standard Features:

  • 18 to 110 GHz coverage
  • Low DSB noise figure
  • Single or dual input channels
  • 30 to 60 dB RF to IF gain
  • 110 K typ noise injection
  • Down conversion and direct-detect systems
  • (Direct-detect systems only available for single frequency RF inputs)
ProductRFin (GHz)IFout (MHz)RF to IF Gain (dB)ApplicationNoise Figure (dB)Connectors
RFE P/NRFin (GHz)IFout (MHz)RF to IF Gain (dB)ApplicationNoise Figure (dB)Connectors
R20.7-U20.720-50060Water Vapor3.5WR-42
R23.8-U23.820-50060Water Vapor3.5WR-42
R31.4-U31.420-50060Water Vapor3.5WR-28
R55-U51 - 5920-50060Temperature Profiler5WR-15
R89-U88 - 90200-100060Water Vapor6WR-10
More Radiometers18-11020-1000

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