PDA專用GPS天線,主要用于固定在PDA機殼內(nèi)上頂位置,或者加上可以轉(zhuǎn)動的外殼放置于機殼外,具有靈敏度高的特點,使用方便,小型U.FL或者IPX接頭輕松方便和你的PDA相連接,另外可以再接一條引線,實現(xiàn)有源到有源天線的自動切換功能.一、天線特性AntennaSpecificationGAS1575R(25×25×4或者25*25*2MM)中心頻率CenterFrequency1575.42MHz±3MHz電壓駐波比V.S.W.R1.5:1帶寬BandWidth±5MHz帶外衰耗Attenuationfo±100MHz＞30dB阻抗Impendence50ohm最高增益PeakGain＞3dBicBasedon7×7cmgroundplane增益范圍GainCoverage＞-4dBicat–90°＜0＜+90°(over75%Volume)天線極化PolarizationRHCP二、放大器規(guī)格LNASpecificationGAA1575AXNX-1放大器增益LNAGain(Withoutcable)27dBTypical噪聲系數(shù)NoiseFigure1.5dB輸出電壓駐波比V.S.W.R＜2.0直流電壓DCVoltage5V±0.5V直流電流DCcurrent15mAMax三、結(jié)構(gòu)特性MechanicalSpecificationGAA1575AXNX-1重量Weight＜60(克)gram外型尺寸Size25*25*8.3mm或者25*25*5.3mm電纜CableRG196/U黑色或灰色8-15MM連接器型號ConnectorU.FL或者IPX固定方式Mounting內(nèi)置外殼顏色Housing無外殼四、低噪聲放大器原理LNA五、環(huán)境特性EnvironmentalSpecification工作溫度WorkingTemp-40℃~+85℃極限溫度StorageTemp-40℃~+100℃振動VibrationSinesweep1g(0-p)10~50~10Hzeachaxis濕度Humidity95%~100%RH防水Weatherproof100%Waterproof可靠性MTBF=1×10-6/pc.hr40℃±5℃DC=5V±0.5V數(shù)量2000pcs持續(xù)時間為480h