一、天线特性AntennaSpecificationDAS1575R(25 25 4)中心频率CenterFrequency 1575.42MHz 3MHz电压驻波比V.S.W.R 1.5:1带宽BandWidth 5MHz带外衰耗Attenuation 100MHz＞30dB阻抗Impendence 50ohm最高增益PeakGain ＞3dBic Basedon7 7cmgroundplane增益范围GainCoverage ＞-4dBicat 90 ＜0＜+90 (over75%Volume)天线极化Polarization RHCP二、放大器规格LNASpecificationDAM1575A4A1放大器增益LNAGain(Withoutcable) 27dB Typical噪声系数NoiseFigure 1.5dB输出电压驻波比V.S.W.R ＜2.0直流电压DCVoltage 3-5V 0.3V直流电流DCcurrent 15mA Max三、结构特性MechanicalSpecificationDAM1575A4A1重量Weight ＜100(克)gram外型尺寸Size 50 39 16mm电缆Cable SYV-50-2 3meterlongorother RG174 3meterlongorother连接器型号Connector SMA固定方式Mounting 磁性 Magneticbase外壳颜色Housing 黑Black四、低噪声放大器原理LNA 省略五、尺寸图 Dimension45X39x15mm 五、环境特性EnvironmentalSpecification工作温度WorkingTemp -40℃~+85℃极限温度StorageTemp -40℃~+100℃