It was the result from that the width of spectrum of the input em pulse packet was too wide , the spectrum included rather strong frequencies being above the cut - off frequency which have not been decayed 分析認為,這是由于輸入電磁波包脈沖的頻譜太寬,存在較強的高于截止頻率的頻率,這部分頻率未被衰減而直接傳輸所致。