频率急降
Frequency drop
以上为机器翻译结果，长、整句建议使用 人工翻译 。
两个单元间的干扰(凸角)会在该频率周围产生功率响应急降，并由于方向性的差异而产生一个峰值。
Interference (or 'lobing') between the two units causes a dip in power response around this frequency, with a peak above it due to their differences in directivity.
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