Pulse compression is an effective means for increasing the output peak power of microwave sources,the coupling coefficient characterizes the coupling strength between the input waveguide and the storage cavity.In order to change the coupling coefficient in different stages of active SLED compression experiment,apulse compressor system with adjustable coupling coefficient was designed by the adapter function of H-T waveguide junction and shorting piston.The adjustment capability of the waveguide H-T was anal...