| 摘要 |
A method for handing-off phased array antenna signals is provided. A phased array multiple antenna system receives and demodulates signals using one receiver. The phased array antennas are controlled electronically by an antenna controller. An antenna switch matrix in the antenna controller selects between signals from a handing-off antenna and a handed-to antenna. A phase comparator compares the two signals and produces a phase error signal proportional to the difference between the phase angles of the two signals. A negligible phase error difference is predetermined wherein antenna handoff can occur without causing loss of phase lock on the handed-to antenna signal. When the antenna controller signals a hand-off and the phase error equals the negligible phase error difference, a fast switch performs the hand-off. Power consumption is also controlled by requiring only one antenna to be powered "on" at a time. |
