| 摘要 |
An improved control electrode geometry for crossed-field microwave tubes is disclosed. The control electrode geometry is disposed facing the microwave slow wave circuit and includes an upstream portion which is recessed from the anode microwave circuit by more than the downstream portion of the control electrode. With a certain positive bias potential applied to the control electrode relative to the cathode potential a certain fraction of the electron stream will be collected on the control electrode in the absence of microwave energy on the microwave circuit, but in the presence of microwave energy on the microwave circuit the microwave energy interacts with the electrons to decrease the fraction of electrons collected on the control electrode.
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