PDA专用GPS天线,主要用于固定在PDA机壳内上顶位置,或者加上可以转动的外壳放置于机壳外,具有灵敏度高的特点,使用方便,小型U.FL或者IPX接头轻松方便和你的PDA相连接,另外可以再接一条引线,实现有源到有源天线的自动切换功能.一、天线特性AntennaSpecificationGAS1575R(25×25×4或者25*25*2MM)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LNASpecificationGAA1575AXNX-1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MechanicalSpecificationGAA1575AXNX-1重量Weight＜60(克)gram外型尺寸Size25*25*8.3mm或者25*25*5.3mm电缆CableRG196/U黑色或灰色8-15MM连接器型号ConnectorU.FL或者IPX固定方式Mounting内置外壳颜色Housing无外壳四、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