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Varactor-tuned X band Gunn oscillator using lumped thin-film circuits

Varactor-tuned X band Gunn oscillator using lumped thin-film circuits

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The operation of a varactor-tuned oscillator using an unen-capsulated Gunn and varactor diode is described, where the associated circuit consists of lumped elements fabricated using thin-film techniques. Depending on the GaAs material, the oscillator provides output powers greater than 10 mW and a tunable 3 dB bandwidth in excess of 1 GHz. At zero varactor bias, the frequency can be set in the 7–12 GHz range. Satisfactory correlation with the theory is demonstrated.

References

    1. 1)
      • D. Cawsey . Wide-range tuning of solid-state microwave oscillators. IEEE J. Solid-State Circuits
    2. 2)
      • K. Wilson . Gunn effect devices and their applications. Mullard Tech. Commun.
    3. 3)
      • R.B. Smith , P.W. Crane . Varactor-tuned Gunn-effect oscillator. Electron. Lett. , 139 - 140
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19710063
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