| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system for dynamically tracking position of a target having antenna. SOLUTION: The system has antenna system (410) designed so as to generate sum and difference antenna patterns (201-1, 201-2). The sum RF channel (401) is coupled with sum channel output of the antenna system, while the difference RF channel (402) is coupled with difference channel output of the antenna system. Thus RF coupler (422-1), which has 1st input coupled with sum RF channel and 2nd input coupled with RF difference channel, is provided. One or more coupling controllers (418-1, 418-2) are designed so as to optionally change any effective coupled value such as the one between the difference channel and the sum channel. Antenna tracking error signal is generated at an output of coupler. COPYRIGHT: (C)2008,JPO&INPIT
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