卫星定位接收机用棒状单极子天线

Whole Direction Monopole Antenna for GPS Receiver

针对高转速条件下,GPS接收机由于天线相位中心不在旋转轴上,导致GPS接收机多普勒频率跳变而无法正常接收的问题,提出了采用消除高转速条件下GPS接收机多普勒频率跳变的单天线———棒状单极子天线。该天线特征是天线对称轴线与弹轴重合,容易使旋转中心与相位中心重合,在高旋转条件下,具有零相位中心特性。试验证明:安装棒状单极子天线的GPS接收机在高旋转条件下消除了多普勒频率跳变,能够正常定位。

Antenna phase center of GPS receiver deviates from the rotation axis under the condition of high spin rate, which will result in the problem of GPS receiver Doppler frequency hopping, and can not be received as nor- mal. Therefore, a whole direction monopole antenna was designed for eliminating the phenomena of GPS receiver Doppler frequency hopping under the condition of high spin rate. The antenna provided the performances of sym- metry axis coincidence with projectile axis; that made it easy that the center of spin was identical with phase cen- ter and zero phase center under the condition of high spin rate. Tests proved that the whole direction monopole antenna installed in the GPS receiver eliminated the phenomena of Doppler frequency hopping under the condition of high spin rate,and made the position locating normal.