| 摘要 |
Provided is a steerable antenna for directing an RF output signal to a source from which an RF input signal was received. In particular, incoming phase measurements are used to calculate a phase offset. The phase offset is associated with the source and stored for subsequent use. The phase offsets are updated with each received message from the source to ensure accurate position tracking. A phase shifted oscillator uses a negated phase offset to create an output carrier signal that has the same frequency as the antenna master oscillator, but a phase shift adequate to allow the output signal or beam to form in the proper direction, i.e. toward the source. Each antenna element operates in both a transmit and receive mode, thereby ensuring that any time delays associated with the transmit and receive functions cancel one another.
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