  SLAC energy doubler (SLED) type radio-frequency pulse compressors are widely
used in large-scale particle accelerators for converting long-duration
moderate-power input pulse into short-duration high-power output pulse. The
phase shift keying (PSK) is one of the key components in SLED pulse compression
systems. Performance of the PSK will influence the output characteristics of
SLED, such as rise-time of the output pulse, the maximal peak power gain, and
the energy efficiency. In this paper, high power microwave source based on
power combining and pulse compression of conventional klystrons was introduced,
the nonideal PSK with slow switching speed and without power output during the
switching process were investigated, the experimental results with nonideal PSK
agreed well with the analytical results.
