CAJ | 학술논문

低增益 GPS 天线测试中，受天线自身所带放大器增益的限制，其输出的信号功率无法达到后端测试设备最低输入灵敏度的要求，致使天线的方向图无法获取。针对低增益 GPS天线不满足场强信号接收机接收灵敏度要求等问题，提出了低增益 GPS 天线方向图的微波暗室测试方法。该方法在常规 GPS 天线测试方法基础上增加接口转换装置，解决灵敏度不足和阻抗匹配；增加被测天线非金属支架，使天线与发射源天线高度一致；发射源天线的波束中心完全对准被测天线物理中心；增加屏蔽线焊点，以保证被测天线的馈点强度。通过实际测试验证，采用该方法可解决低增益 GPS 天线方向图在微波暗室的测试问题。
저증익 GPS 천선측시중，수천선자신소대방대기증익적한제，기수출적신호공솔무법체도후단측시설비최저수입령민도적요구，치사천선적방향도무법획취。침대저증익 GPS천선불만족장강신호접수궤접수령민도요구등문제，제출료저증익 GPS 천선방향도적미파암실측시방법。해방법재상규 GPS 천선측시방법기출상증가접구전환장치，해결령민도불족화조항필배；증가피측천선비금속지가，사천선여발사원천선고도일치；발사원천선적파속중심완전대준피측천선물리중심；증가병폐선한점，이보증피측천선적궤점강도。통과실제측시험증，채용해방법가해결저증익 GPS 천선방향도재미파암실적측시문제。
Because the low-gain GPS antenna does not meet the sensitivity requirement of the filed signal receiver receiving,this paper addresses a method about the low-gain GPS antenna pattern in the anechoic chamber.The method is based on the conventional GPS antenna test methods and to solve the sensitivity deficiency and the impedance matching problem by adding the interface conversion device.The added measured antenna nonmetal bracket makes antenna be the same height as the source antenna and it also results that the center of the source antenna beam can be aimed at the center of the measured antenna completely.The added shielding solder joints are used to ensure the strength of the feed point of measured antenna.The data shos that the low-gain GPS antenna pattern which is gained by this method is basically same.