Experimental Observation of Frequency Locking and Noise Reduction in a Self-Injection-Locked Magnetron

We report an experimental observation of frequency locking and noise reduction in a self-injection-locked magnetron oscillator operating at 2.455 GHz. Part of the magnetron output signal is injected into the magnetron through a feedback loop to lock the oscillation frequency. A frequency-tunable hig...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2007-12, Vol.54 (12), p.3430-3432
Main Authors: Choi, Jin Joo, Choi, Gil Wong
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronic circuits
Electronic tubes, masers
Electronics
Exact sciences and technology
Feedback loops
Frequency locking
Holes
Magnetrons
Noise levels
Noise reduction
Oscillations
Oscillators
Oscillators, resonators, synthetizers
self-injection-locked magnetron
Tuning
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Summary:We report an experimental observation of frequency locking and noise reduction in a self-injection-locked magnetron oscillator operating at 2.455 GHz. Part of the magnetron output signal is injected into the magnetron through a feedback loop to lock the oscillation frequency. A frequency-tunable high- cavity is placed in the feedback loop to tune the locked frequency. Experimental results show a noise reduction by more than 13 dB at 1 MHz offset and a frequency tuning bandwidth of 0.12% at a center frequency of 2.455 GHz.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2007.908879