The frequency range of EMC test is very broad. If the usable bandwidth of the antenna used in EMC test is too narrow the quantity of antenna will be unacceptable. So in EMC test the bandwidth of antenna is commonly broad.

• 电磁兼容试验的频率范围从几十赫兹直到几十吉赫兹,在这么宽的频率范围内做辐射试验,如果天线的使用带宽窄的话,那么覆盖这么宽频率范围的天线数量将会导致试验无法正常进行,所以在电磁兼容试验当中使用的天线一般都是宽频带天线。