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国际ＥＭＣ标准规定了在不断增加的频带宽度上对辐射和干扰免疫性的测量。使用窄带天线要明显耗费更多的时间，因为每次测量之间必须停下更换天线。为了避免这种浪费，需要覆盖较宽频带的测试天线。罗德与施瓦茨公司（ＲＯＨＤＥ ＳＣＨＷＡＲＺ）的ＵＬＴＲＡＬＯＧＨＬ５６?
International EMC standards set forth the measurement of immunity to radiation and interference at ever-increasing bandwidths. The use of narrow-band antennas consumes significantly more time because the antenna must be stopped and changed between measurements. To avoid this waste, you need to cover a wider band of test antennas. Rohde & Schwarz (ROHDE SCHWARZ) ULTRALOGHL56?