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1. 发明授权

US5519405A Direction adjustment indicator for a satellite radio wave receiving antenna 失效
标题翻译：卫星无线电波接收天线的方向调整指示
公开(公告)号：US5519405A
公开(公告)日：1996-05-21
申请号：US227768
申请日：1994-04-14
申请人： Hiroshi Matsubara , Sohei Maruyama
发明人： Hiroshi Matsubara , Sohei Maruyama
IPC分类号： H01Q1/12 , H01Q3/00
CPC分类号： H01Q1/1257
摘要： A direction adjustment indicator for a satellite radio wave receiving antenna comprises a demodulating circuit to demodulate a satellite radio wave received by the antenna, a peak holding circuit always to output a held peak value of the demodulated output of the demodulating circuit, a comparator circuit and a display element. The comparator circuit compares the instantaneous value of the demodulated output and the held peak value, and outputs a signal when both values are equal and another different signal when both values are not equal. The display element gives two different kinds of display in accordance with the signals. While the azimuth angle of the antenna is varied in one direction, a peak value of the demodulated output is held and while the angle is varied in the opposite direction, the optimum azimuth angle is displayed for which the instantaneous value of the demodulated output agrees with the held peak value.
摘要翻译：用于卫星无线电波接收天线的方向调整指示器包括解调电路，用于解调由天线接收的卫星无线电波，峰值保持电路总是输出解调电路的解调输出的保持峰值，比较器电路和显示元件。比较器电路将解调输出的瞬时值与保持的峰值进行比较，当两个值相等时输出信号，当两个值不相等时，输出另一个不同的信号。显示元件根据信号给出两种不同种类的显示。当天线的方位角在一个方向上变化时，解调输出的峰值被保持，并且当角度在相反方向上变化时，显示最佳方位角，其中解调输出的瞬时值与持有的峰值。

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