Millimeter-Wave Gunn Oscillators

Spacek Labs millimeter-wave Gunn oscillators use high Q resonator circuits to produce clean and stable output signals. Spacek Labs can provide these mm-wave Gunn oscillators at any frequency in all the major waveguide bands from 18 to 110 GHz. - K-band (WR-42), Ka-band (WR-28), Q-band (WR-22), U-band (WR-19), V-band (WR-15), E-band (WR-12), and W-band (WR-10). The bias input contains an integrated, low frequency suppression filter and over voltage protection circuit. These Gunn oscillators can be used as a laboratory source, a multiplier driver, local oscillator or whenever a reliable source for the generation of millimeter-wave signals is required. The varactor tuning voltage is from the Gunn bias voltage to -20 volts (ex. +5v to -20v), or from Gunn bias voltage to +30v (ex. +5v to +30v).





GK-222GKa-300VA-1GU-500GE-720GW1-940

Standard Features:

  • High reliability and performance
  • Narrow to broadband monotonic tuning
  • Combined mechanical and varactor tuning

  • High RF output power
  • Integral heatsink
  • Micrometer tuning available


  • When a temperature controller is used, the output power is reduced by approximately 1.5dB.
  • The threshold current is approximately 1.3 times the operating current.
  • Storage temperature is -55°C to +125°C. The operating temperature for GaAs Gunn diodes is -55°C to +71°C.


Part NumberCenter FrequencyPower OutputTunable BandwidthFrequency StabilityPower StabilityFrequency TuneOutput ConnectorBias VoltBias CurrentQuick Ship
XXX: Freq (GHz)Specify Single Freq (GHz)(mW) (Max)(MHz) (Max)(MHz/°C) (Max)(dB/°C) (Typ)SpecifySpecify Coax or WG(Volts) (Typ)(Amps) (Typ / Max)Quick Ship
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GK-XXX-MTBetween 18 to 26.5 GHz30010000.4-0.04Mechanically-tunedCoax or WR4260.8 / 1.4
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GK-XXX-VTBetween 18 to 26.5 GHz1501000.4-0.04Varactor-tunedCoax or WR4260.8 / 1.4
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GKa-XXX-MTBetween 26.5 to 40 GHz25030000.5-0.04Mechanically-tunedCoax or WR2850.8 / 1.4
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GKa-XXX-VTBetween 26.5 to 40 GHz1001000.5-0.04Varactor-tunedCoax or WR2850.8 / 1.4
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GQ-XXX-MTBetween 33 to 50 GHz15030000.7-0.04Mechanically-tunedCoax or WR2240.8 / 1.4
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GQ-XXX-VTBetween 33 to 50 GHz501000.7-0.04Varactor-tunedCoax or WR2240.8 / 1.4
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GU-XXX-MTBetween 40 to 60 GHz15030000.7-0.04Mechanically-tunedCoax or WR2240.8 / 1.4
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GU-XXX-VTBetween 40 to 60 GHz501000.7-0.04Varactor-tunedCoax or WR2240.8 / 1.4
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GV-XXX-FTBetween 50 to 75 GHz60104-0.04Fixed-tunedCoax or WR1540.8 / 1.4
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GV-XXX-MTBetween 50 to 75 GHz605004-0.04Mechanically-tunedCoax or WR1540.8 / 1.4
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GV-XXX-VTBetween 50 to 75 GHz605004-0.04Varactor-tunedCoax or WR1540.8 / 1.4
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GE-XXX-FTBetween 60 to 90 GHz60105-0.04Fixed-tunedCoax or WR1240.7 / 1.1
GE-XXX-MTBetween 60 to 90 GHz5010005-0.04Mechanically-tunedCoax or WR1240.7 / 1.1
GE-XXX-VTBetween 60 to 90 GHz2020005-0.04Varactor-tunedCoax or WR1240.7 / 1.1
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GW1-XXX-FTBetween 75 to 95 GHz40105-0.04Fixed-tunedCoax or WR1040.7 / 1.1
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GW1-XXX-MTBetween 75 to 95 GHz2510005-0.04Mechanically-tunedCoax or WR1040.7 / 1.1
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GW1-XXX-VTBetween 75 to 95 GHz1020005-0.04Varactor-tunedCoax or WR1040.7 / 1.1
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GW2-XXX-FTBetween 95 to 110 GHz10105-0.04Fixed-tunedCoax or WR1040.7 / 1.1
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GW2-XXX-MTBetween 95 to 110 GHz1010005-0.04Mechanically-tunedCoax or WR1040.7 / 1.1
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GW2-XXX-VTBetween 95 to 110 GHz520005-0.04Varactor-tunedCoax or WR1040.7 / 1.1
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More Gunn OscillatorsBetween 18 to 110 GHz
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