SUPER-RELTRON analysis and experiments

The authors have developed a highly efficient, high-power microwave tube called SUPER-RELTRON. They have achieved operation at >400 MW with approximately 50% efficiency at 1 GHz and >300 MW with 50% efficiency at 3 GHz. The RF pulse durations are typically a few hundred nanoseconds. These ligh...

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Bibliographic Details
Main Authors: Miller, R.B., McCullough, W.F., Lancaster, K.T., Muehlenweg, C.A.
Format: Conference Proceeding
Language:English
Subjects:
Cathodes
Electric breakdown
Electron beams
Electron tubes
Magnetic fields
Optical modulation
Power generation
Radio frequency
Rectangular waveguides
Tellurium
Online Access:Request full text
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Summary:The authors have developed a highly efficient, high-power microwave tube called SUPER-RELTRON. They have achieved operation at >400 MW with approximately 50% efficiency at 1 GHz and >300 MW with 50% efficiency at 3 GHz. The RF pulse durations are typically a few hundred nanoseconds. These lightweight, compact tubes do not require an external magnetic field. The RF output coupling is straightforward and power is delivered directly via the fundamental TE/sub 10/ wave in a rectangular waveguide without a mode converter. The key features of the tube include (1) generation of a well-modulated electron beam by periodic virtual cathode formation: (2) postacceleration of the modulated beam to reduce the relative electron energy spread; and (3) a multicavity output section that efficiently extracts power without RF breakdown. The authors discuss various aspects of the device and briefly summarize experimental results.< >
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.1992.187955