75欧姆射频同轴电缆技术指标

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1、75欧姆射频同轴电缆技术指标SYWV75-5SYWV75-5ASYWV(Y)75-7SYWV(Y)75-7-ISYWV(Y)75-7ASYWV(Y)75-9SYWV(Y)75-9-ISYWV(Y)75-9ASYWV(Y)75-12SYWV(Y)75-12-ISYWV(Y)75-12ASYWLV(Y)75-9SYWLV(Y)75-9-1SYWLV(Y)75-12SYWLV(Y)75-12-I内导体(mm)1.01.01.61.661.62.02.152.02.62.772.62.02.152.62.77发泡绝缘(mm)4.84.87.2

2、57.257.259.09.09.011.511.511.59.09.011.511.5外导体(mm)5.46.07.97.98.59.69.610.412.212.212.89.69.912.212.4护套(mm)7.27.610.310.310.612.312.312.615.015.015.412.312.315.015.0衰减常数(dB/100m)5MHz2.02.01.51.31.51.21.01.20.70.60.71.21.00.70.650MHz4.74.73.23.03.22.42.32.41.91.71.92.42

3、.31.91.7200MHz9.09.06.45.86.45.04.55.03.93.53.95.04.53.93.5550MHz15.815.810.710.310.78.58.08.56.76.06.78.58.06.76.0800MHz19.019.013.312.813.310.49.910.48.27.48.210.49.98.27.41000MHz22.022.015.114.415.111.911.311.99.58.59.511.911.39.58.5阻抗(Ω)75±375±375±2.575±2.575±2.575±

4、2.575±2.575±2.575±2.075±2.075±2.075±2.575±2.575±2.075±2.0电容(PF/m)55.855.852.452.452.450.850.850.851515150.850.85151回波损耗(dB)VHF222220222020222020222020222022UHF202018201818201818201818201820说明：■执行标准:GY/T135-1998　　　■SYWV--物理发泡聚乙烯绝缘，铝塑复合膜和镀锡圆铜丝或铝镁合金丝编织，聚氯乙烯护套。　　　■SYWY--物理发

5、泡聚乙烯绝缘，铝塑复合膜和镀锡圆铜丝或铝镁合金丝编织，聚乙烯护套。　　　■SYWLY-75-9型，SYWLY-75-12型为物理发泡聚乙烯绝缘，铝管外导体、聚乙烯护套。　　　■75-5A、75-7A、75-9A、75-12A外导体结构为四层屏蔽形式。　　　■75-5和75-7的内导体用纯铜或铜包钢；75-9和75-12的内导体用纯铜或铜包铝。CoaxialCableQR540-SeriesMechanicalandElectricalCharacteristicsImpedance75±2.0OhmsCapacitance50±3.0

6、(pF/m)VelocityofPropagation86%ReturnLoss(dB)VHF5-300MHz  >=22dBUHF300-960MHz  >=20dBScreeningAttenuation(dB)VHF5-50MHz  >=100dBUHF200MHzUpward  >=110dB Attenuation[@68°F.(20°C)]Frequency(MHz)Maximum(dB/100ft)Maximum(dB/100m)50.140.46300.341.12500.441.44830.581.91080.662

7、.171500.792.591930.902.952200.983.222501.033.382701.073.513001.133.713751.274.174001.324.334501.404.595501.565.127501.856.078652.006.5610002.177.12