O             名称         结构与材料

   1             天线基片       介质陶瓷

   2              引脚         铜镀锡合金

   3             辐射面          镀银

   4             接地面          镀银

5．射频特性    RF Characterisrics

                        表2

   NO                         项目                         特性                      环境实验允许附加误差 

      5.1                       接收频率范围            1571-1579MHz                  ——

      5.2                       中心频率                  1575.42MHz                      ±2.0MHz

       5.3                            带宽                  8MHz                                     0.5MHz

      5.4                           驻波比                             1.5max                                        ±0.5

      5.5                           增益                 ＋1.5Dbi                                   ±0.2

      5.6                           轴比                                   ≤3．0DB                                   ±0.2

      5.7                          偏振方式                           右旋圆极化                              ——

      5.8                        特性阻抗                             50 Ohm                                      ±5.0

      5.9                        频率温度系数           20max                                     ——     

     5.10        与天线平面成10℃夹角时增益     －2.0DBI                                ±0.2

     备注：  以上参数均为标准品参数，实际使用将以为客户调试的最优效果样品为准