Baruch Levush

Abstract: The development of a 10-kW average power, 94-GHz gyroklystron amplifier is described. This average power was obtained with 11% radio frequency (RF) duty factor and 92-kW peak power in the TE/sub 01/ circular cavity mode. The instantaneous bandwidth was 420 MHz, and the efficiency was 33.5%. Low-duty-factor testing also yielded a peak power of as much as 115 kW with 600-MHz instantaneous bandwidth. This development effort was carried out over the past three years and represents record average power performance in an amplifier at this frequency.

TL;DR: In this article, the authors present a model, used in the traveling-wave tube simulation code CHRISTINE, in which stability is determined including a number of important effects including the placement of severs, their reflection and transmission coefficients, the profile of attenuation along the interaction length, the presence of a driven signal, and the coupling of forward and backward waves due to asymmetries in the helix support structure.

TL;DR: In this article, the authors describe methods that have led to successfully fabricated millimeter wave circuits, including applying ultra-thick SU-8 photoresist layers on copper, copper electroforming solutions, and the challenging removal of the photoresists.

TL;DR: In this paper, a self-consistent large-signal beam-field interaction model for vacuum electronic microwave sources with external cavities is described, which includes a selfconsistent solution of the three-dimensional equations of electron motion and the time-dependent field equations.

TL;DR: In this article, a collector and a four-cavity circuit for a multiple-beam klystron (MBK) operating in the fundamental mode at a center frequency of 3.27 GHz (S-band) were designed to be used with a 32-A 45kV magnetically shielded eight-beam electron gun currently under fabrication.