多普达P100,P800,依天G500等全系列产品通用GPS天线!一、天线特性AntennaSpecificationGAS1575R(25×25×4)中心频率CenterFrequency1575.42MHz±3MHz电压驻波比V.S.W.R1.5:1带宽BandWidth±5MHz带外衰耗Attenuationfo±100MHz＞30dB阻抗Impendence50ohm最高增益PeakGain＞3dBicBasedon7×7cmgroundplane增益范围GainCoverage＞-4dBicat–90°＜0＜+90°(over75%Volume)天线极化PolarizationRHCP二、放大器规格LNASpecificationGAA1575A4D5放大器增益LNAGain(Withoutcable)27dBTypical噪声系数NoiseFigure1.5dB输出电压驻波比V.S.W.R＜2.0直流电压DCVoltage5V±0.5V直流电流DCcurrent15mAMax三、结构特性MechanicalSpecificationGAA1575A4d5重量Weight＜100(克)gram外型尺寸Size46mm×14mm电缆CableSYV-50-25meterlongorotherRG1745meterlongorother连接器型号ConnectorMS-147PLUG固定方式Mounting螺丝固定外壳颜色Housing黑Black四、低噪声放大器原理LNA五、环境特性EnvironmentalSpecification工作温度WorkingTemp-40℃~+85℃极限温度StorageTemp-40℃~+100℃振动VibrationSinesweep1g(0-p)10~50~10Hzeachaxis湿度Humidity95%~100%RH防水Weatherproof100%Waterproof可靠性MTBF=1×10-6/pc.hr40℃±5℃DC=5V±0.5V数量2000pcs持续时间为480h