Experimental study of an injection-locked gyrotron backward-wave oscillator

C. S. Kou, S. H. Chen, L. R. Barnett, H. Y. Chen, K. R. Chu

Research output: Contribution to journalArticlepeer-review

70 Scopus citations


A Ka-band gyrotron backward-wave oscillator (gyro-BWO) experiment has been performed to investigate the phase control, fast tunability, and power capability. Efficient injection locking was accomplished by novel circuit arrangements. Maximum power of 113 kW at 19% efficiency was achieved, showing favorable scaling to still higher powers. Stable voltage tuning bandwidth of 5% at 67 kW peak power was also observed. The measured performance has demonstrated a strong potential of the gyro-BWO for new applications requiring high-power tunable millimeter-wave sources.

Original languageEnglish
Pages (from-to)924-927
Number of pages4
JournalPhysical Review Letters
Issue number7
StatePublished - 1993


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