Frequency and phase modulation performance of an injection-locked CW magnetron

It is demonstrated that the output of a 2.45-GHz magnetron operated as a current-controlled oscillator through its pushing characteristic can lock to injection signals in times of the order of 100-500 ns depending on injection power, magnetron heater power, load impedance, and frequency offset of th...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2006-07, Vol.53 (7), p.1721-1729
Main Authors: Tahir, I., Dexter, A., Carter, R.
Format: Article
Language:English
Subjects:
Amplification
Amplifiers
Anodes
Applied sciences
Circuit properties
Circuits of signal characteristics conditioning (including delay circuits)
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency modulation
Frequency response
frequency shift keying (FSK)
Heaters
Heating equipment
Injection locked oscillators
injection locking
Magnetrons
modulation
Oscillators
Oscillators, resonators, synthetizers
Phase modulation
Phase shift keying
phase shift keying (PSK)
phase-locked loops (PLL)
Pushing
Resonant frequency
Switches
Switching, multiplexing, switched capacity circuits
twining
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Summary:It is demonstrated that the output of a 2.45-GHz magnetron operated as a current-controlled oscillator through its pushing characteristic can lock to injection signals in times of the order of 100-500 ns depending on injection power, magnetron heater power, load impedance, and frequency offset of the injection frequency from the natural frequency of the magnetron. Accordingly, the magnetron can follow frequency and phase modulations of the injection signal, behaving as a narrow-band amplifier. The transmission of phase-shift-keyed data at 2 Mb/s has been achieved. Measurements of the frequency response and anode current after a switch of phase as a function of average anode current and heater power give new insight into the locking mechanisms and the noise characteristics of magnetrons
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2006.876268