【摘要】 借助于群时延特性和品质因数Ｑ的关系，用Ｑ估算相移比用相频特或测量群时延的方法估算相移更加明了，方便和实用．更多还原

【Abstract】 With the help of the relation of the the group delay time with the Q-factor,Q-factor is adopted to evaluate the phase shift.this way is more clearly and easily than with phase-frequency characteristic of determing the group delay time.更多还原