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1

Digitale Medien

Design and operation of a module of phase-locked relativistic magnetrons (1991)

Levine, J. S. ; Aiello, N. ; Benford, J. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 70 (1991), S. 2838-2848

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: We have achieved phase-locked operation of a module consisting of up to seven relativistic magnetrons. The magnetrons are connected by waveguide in a peer/peer configuration, with no one magnetron acting as a master oscillator. The signals used for coupling are each a substantial fraction of a magnetron's radiated power. Total extracted power, at 2.8 GHz, was 2.0 GW with four magnetrons and 2.9 GW with seven. Several interconnection geometries were explored. One particular geometry was found to produce qualitatively better phase-locked operation than any other. This was in agreement with the predictions of a numerical model of the magnetrons as coupled van der Pol oscillators.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.349347

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2

Digitale Medien

A master-oscillator-driven phase-locked vircator array (1990)

Sze, H. ; Price, D. ; Harteneck, B. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 68 (1990), S. 3073-3079

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Phase locking of a vircator array driven by a relativistic magnetron in a pure master–slave configuration has been achieved. A single high voltage pulse drives the relativistic magnetron and the vircator array in series. Phase locking occurs for ∼40 ns. The time required to lock is (approximately-equal-to)10 ns. the peak array power is (approximately-equal-to)1 GW. The injection ratio, ρ, and allowable frequency difference, Δf, relationship required for phase locking is examined. The results suggest that the Adler's inequality, ρ(approximately-greater-than)(Q/Δf) f, is a necessary, but not sufficient condition to predict phase locking. A hybrid configuration in which the driven vircators are also mutually connected together has also been attempted. Phase locking is observed with better phase stability than in the pure master–slave configuration.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.346401

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3

Digitale Medien

Phase locking of high-power microwave oscillators (1989)

Woo, W. ; Benford, J. ; Fittinghoff, D. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 65 (1989), S. 861-866

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Phase locking is considered both for a case in which an oscillator is driven by an external signal without feedback, and for a case in which two coupled oscillators drive each other. A comprehensive sustained oscillator model is used for the driven microwave cavity. The new locking conditions for two coupled oscillators show that phase locking can occur only when the connector contributes the zero or π phase delay. Temporal behavior is solved numerically. Calculations with large priming power agree with the experiments on a high-power magnetron driven vircator in which there is no feedback to the magnetron. The mutual drive calculations also agree with the experiments on high-power coupled magnetrons.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.343079

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4

Digitale Medien

Dynamics of a virtual cathode oscillator driven by a pinched diode (1986)

Sze, H. ; Benford, J. ; Woo, W. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Physics of Fluids 29 (1986), S. 3873-3880

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ISSN: 1089-7666

Quelle: AIP Digital Archive

Thema: Physik

Notizen: A new method is demonstrated for extracting radiation from a virtual cathode oscillator in transverse electric (TE) waveguide modes. The dominant radiation mechanism occurs in the region of the virtual cathode, and is not due to reflexing of electrons. Microwave radiation occurs simultaneously or just after beam pinching in the diode. Electrostatic signals show simultaneous occurrence of the virtual cathode and microwave radiation. At the same time, the electron population divides into a beam population and a reflexing electron population. Inhibition of pinching by an axial guide field suppresses microwave radiation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.865771

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5

Digitale Medien

Phase locking of two strongly coupled vircators (1990)

Sze, H. ; Price, D. ; Harteneck, B.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 67 (1990), S. 2278-2282

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Phase locking of two high-power virtual cathode oscillators (vircators) has been achieved. The vircators interact directly by common connection through a short waveguide. Reproducible phase locking occurs for ∼45 ns. The time required to establish phase coherence is (approximately-equal-to)10 ns. The peak power is ∼1.6 GW.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.345521

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