Multiple-Beam Klystron Amplifiers: Performance Parameters and Development Trends

Abstract

This paper presents a description of multiple-beam klystrons (MBKs). The main material is based on experimental results and practical experience gained at the Federal State Unitary Enterprise Research and Production Corporation "Istok," where MBK technology has been extensively developed and manufactured beginning in the 1960s. In addition to this material, some original ideas, designs, and experimental data from other enterprises are presented. Three classes of MBKs are discussed in detail: high-power, medium-power, and miniaturized devices. Features common to all MBK classes as well as the reasons constraining MBK parameters in comparison with the parameters of single-beam klystrons are also discussed. The principal characteristics of typical MBKs are presented and main application areas for different MBK types are considered. Finally, directions for further development of this branch of microwave amplifiers are discussed.Index Terms-Application areas, klystron, multibeam, multiple-beam klystron (MBK), multiple-beam resonators.

Multiple-Beam Klystrons and Their Use in Complex Microwave Devices

“…A critical issue is whether MBK amplifiers have sufficiently linear characteristics to amplify these complicated signals without noticeable distortions. This problem was discussed recently in [6]. In the following paragraphs, we present a brief summary of this discussion.…”

“…In the following paragraphs, we present a brief summary of this discussion. Table 2 [6] lists some key parameters of the complex signals typically used in radio-electronic systems and the features of MBKs that affect the possibility of their undistorted amplification. As it follows from the table, we see that the most significant parameters of the microwave signal carrying the information being transmitted to (or from) the object, can be amplified by the MBK with minor distortion.…”

Vacuum Electronics: Status and Trends

“…Russian [12,13,14] and more recently Chinese [15] scientists and engineers have applied multiple-beam technology to a variety of vacuum electronic devices, including the TWT and the klystron. The "high water mark" in compactness may well have been achieved by ISTOK (Russia), which developed a Ku-band MBK capable of delivering 1 kW of peak power (333 W average) weighing only I kg, including the magnet [14].…”

“…The "high water mark" in compactness may well have been achieved by ISTOK (Russia), which developed a Ku-band MBK capable of delivering 1 kW of peak power (333 W average) weighing only I kg, including the magnet [14].…”

Design and Simulation of Extended Interaction Cavities for a Ka band Multi beam Klystron

“…A single beam of the electron is used for beam-wave interaction in case of a conventional single-beam klystron amplifier, but in the case of multi-beam klystrons (MBK), more than one electron beam is used for the same purpose 2,3 . In general, achievable RF power and bandwidth of MBK amplifiers can be higher than traditional single-beam klystrons.…”