Analytical Exploration of Folded Waveguide Circuit Design for High-power Traveling-wave Tube Amplifier

Abstract

In this paper, we analyze the design of the folded waveguide slow-wave circuit for traveling-wave tube (TWT) amplifiers. On the basis of physical analyses, an improved physical-based design method that is especially suitable for high-power devices is developed. The proposed method overcomes the difficulties resulting from increased operating voltages and requirements for higher interaction impedance in high-power designs. It enables balancing of dispersion and interaction impedance, which is a flexible approach in addressing operational problems. Furthermore, the essential relationship between the proposed and the existing methods are revealed. A Ka-band folded waveguide TWT amplifier is designed and examined, thereby confirming that the new design method is effective and reliable.

Performance Evaluation and Experimental Study of a 0.34-THz Folded Waveguide Sheet Beam BWO

“…We estimate the value of "p" by aligning the beam velocity with the velocity of the SWS. The phase velocity can be determined using the following relationships [13]:…”