公开(公告)号：US06522291B1

公开(公告)日：2003-02-18

申请号：US09716451

申请日：2000-11-21

申请人： Takahide Noguchi ,  Katsuya Yamamoto ,  Yuichiro Naoi ,  Koji Yamamoto ,  Hideki Oka ,  Hiroki Nishimoto

发明人： Takahide Noguchi ,  Katsuya Yamamoto ,  Yuichiro Naoi ,  Koji Yamamoto ,  Hideki Oka ,  Hiroki Nishimoto

IPC分类号： H04B7185

CPC分类号： H01Q23/00 ,  G01S19/36 ,  H01Q1/526 ,  H01Q9/0407

摘要： A compact GPS receiver includes a GPS antenna composed of a patch and a ground plane to receive high frequency satellite signals, an analog circuit which processes the high frequency satellite signals into a digital signal, a digital circuit which processes the digital signal to compute positional coordinates of the GPS antenna, and an interface connector which outputs the positional coordinates to an external device. A substrate is provided to support the GPS antenna, the analog circuit, the digital circuit, and the interface connector. An EMI (electromagnetic interference) shield is provided to shield at least the digital circuit to block a noise developing at the digital circuit from interfering with the GPS antenna. The GPS antenna is mounted on the EMI shield to share the ground plane with the EMI shield, while keeping the patch insulated electrically from the EMI shield. Thus, the GPS receiver can be made compact by making the use of the EMI shield also as the ground plane of the antenna, while assuring to block the noise from interfering with the antenna and affording sufficient antenna gain with the increased ground plane.

摘要翻译： 紧凑型GPS接收机包括由贴片和接地平面组成的GPS天线以接收高频卫星信号，将高频卫星信号处理成数字信号的模拟电路，处理数字信号以计算位置坐标的数字电路 的GPS天线，以及将位置坐标输出到外部设备的接口连接器。 提供基板以支持GPS天线，模拟电路，数字电路和接口连接器。 提供EMI（电磁干扰）屏蔽以屏蔽至少数字电路以阻止在数字电路处产生的噪声干扰GPS天线。 GPS天线安装在EMI屏蔽层上，与EMI屏蔽共享接地层，同时保持贴片与EMI屏蔽电绝缘。 因此，通过将EMI屏蔽物也用作天线的接地平面，可以使GPS接收机紧凑化，同时确保阻止噪声干扰天线，并通过增加的接地平面提供足够的天线增益。