A new concept for generation of multi-megawatt power approaching hundred percent conversion efficiency

Wessel‐Berg, Tore

doi:10.1109/iedm.1977.189217

Cited by 3 publications

(3 citation statements)

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“…II are used to find the electron trajectories, but we must define the rf drive power and the electronic and overall efficiencies to complete the analysis. The electrons gain energy from the deflection-cavity fields that is due to beam-loading effects; thus the total rf drive power is P DRF = P L + P BL (15) where the beam loading power is…”

Section: Calculation Of Radial-style Gyrocon Performancementioning

confidence: 99%

“…All fabrication orders were placed by Mar. 1979 and all parts were to be delivered by Sept. 15,1979 so that some testing might take place at the end of FY-79. Unfortunately, the vendors of two major subassemblies, the output and deflection cavities, were more than 6 months late; the final assembly of the gyrocon could not begin until FY-80.…”

Section: Introductionmentioning

confidence: 99%

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Gyrocon Radio-Frequency-Generator project for FY-78 and -79

Tallerico¹,

Rankin²

1980

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The gyrocon is a high-power, high-efficiency amplifier that operates by deflection modulation of an electron beam. The bunching is better than that in a klystron, especially for very high powers and UHF frequencies, so the overall efficiency and the maximum output power can be higher than in a klystron. The present theory includes the effects of large signals, space charge, and finite beam size. The equations of motion are relativistically correct, and the space-charge fields are correct to first order in v/c. The theory is derived and a computer code to solve these equations is discussed. The code is then used to obtain several specific examples of gyrocon designs that have significant advantages over klystrons or gridded tubes in the 0.2-to 1.0-GHz frequency range. Several embodiments of the gyrocon are possible, and we discuss the radial style and the spherical style in this report. The radial style has a bender magnet to increase the deflection of the beam, whereas the spherical gyrocon does not employ the bender magnet. The optimium frequency range for the spherical gyrocon is from 1.0 to 2.5 GHz. The progress to date on the design, construction, and testing of a 650-kW output, 450-MHz prototype gyrocon is discussed. We had planned to have this gyrocon operating by the end of FY-79; however, two of the major subcontractors have had unexpected problems in producing the deflection and output cavities. The experimental program therefore will continue into FY-80. The sagacity of the early R&D investment, which proved the device feasibility by developing a sound theory and a prototype design, has been verified by receipt of funds from other agencies with urgent application needs. :.

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Section: Calculation Of Radial-style Gyrocon Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gyrocon Radio-Frequency-Generator project for FY-78 and -79

Tallerico¹,

Rankin²

1980

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“…4 maintain optimum combination of parameters specified by the design curves in Figure 5.3, and, in addition, use the smallest possible radius in the output resonator, which is R = 2. c…”

Section: Excessive Rf Distortion and Overtaking Phenomenamentioning

confidence: 99%

High Efficiency Deflection Modulated Microwave Generator Study.

Wessel‐Berg¹,

Tammaru²

1980

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High gain deflection modulated microwave amplifiers using electric deflection

Wessel‐Berg¹,

Earley²,

Frey³

et al. 1980

1980 International Electron Devices Meeting

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Existing deflection modulated amplifiers (gyrocons) generally demonstrate low gain (less than 25 dB) and utilize deflection by magnetic fields. In this paper we consider electric deflection and a more general deflection system composed of several uncoupled cavities in cascade. This leads to a considerable increase in gain, which becomes comparable to that in klystrons, eliminating the need for bulky dc deflection magnets previously used in magnetic deflection amplifiers.

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A new concept for generation of multi-megawatt power approaching hundred percent conversion efficiency

Cited by 3 publications

References 0 publications

Gyrocon Radio-Frequency-Generator project for FY-78 and -79

Gyrocon Radio-Frequency-Generator project for FY-78 and -79

High Efficiency Deflection Modulated Microwave Generator Study.

High gain deflection modulated microwave amplifiers using electric deflection

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