Abstract
This paper presents the experimental study of microwave pulse compression using a five-fold helically corrugated waveguide. In the experiment, the maximum power compression ratio of 25.2 was achieved by compressing an input microwave pulse of 80-ns duration and 9.65-9.05-GHz frequency swept range into a 1.6-ns Gaussian-envelope pulse. For an average input power of 5.8 kW generated by a conventional traveling-wave tube, a peak pulse output power of 144.8 kW was measured corresponding to an energy efficiency of 66.3%.
Highlights
P ULSE compression technology that converts long-duration low-power pulses into short high peak-power pulses is commonly used in applications that require high peak power and pulsed operation, such as sonar and radar systems [1], [2]
Gigawatt-level microwave radiation can be achieved by a frequency-swept multi-megawatt pulse generated by a high power vacuum electronic device acting as the input source for a microwave pulse compressor based on a high-fold helically corrugated waveguide (HCW) [8]
The new HCW studied in this paper demonstrates much better performance than the smooth waveguide
Summary
P ULSE compression technology that converts long-duration low-power pulses into short high peak-power pulses is commonly used in applications that require high peak power and pulsed operation, such as sonar and radar systems [1], [2]. To achieve a high compression ratio , the dispersive media requires operation over a wide frequency band to give a large with a large monotonic group velocity difference in the operating frequency band, which allows a large value This provides the capability of supporting a long pulse width in a medium of specific length , as well as a low equivalent loss factor [9]. The pulse compression experiment using a five-fold HCW with a larger average diameter of 65.7 mm for enhanced power handling is presented. To give the readers a full picture of the experiment, the power-handling capability and the construction of the five-fold HCW are presented in this paper with an expanded theory of the pulse compression
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