Such as the applications of the portable satellite receivers and the handling personal communication equipments limit strictly the size of filter.
例如在便携式卫星接收机和手持式个人通信设备中的应用都对滤波器的尺寸提出了严格的限制。
At studying the "Connection in moving" equipments, of the satellite communication earth station, we request that the antenna system carried on the car can follow the appointed satellite very well.
在研究卫星通讯地面站的动中通设备时，要求天线系统在车载机上能很好地跟踪指定的卫星。
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