| 摘要 |
A signal feed system for a phased array antenna having a plurality of antenna elements arranged in an array with each antenna element being connected to a transmit/receive T/R module, the system having transmitter and receiver Tx/Rx equipment with an optical fiber signal feed between the Tx/Rx equipment and the T/R modules. A first opto-electronic interface converts signals from transmitter Tx to optical signals which are applied, via an optical fiber, to an optical coupler that couples those optical signals to a first group of optical fibers, each of which is connected to another opto-electronic interface where the optical signals are converted to electric signals and applied to the transmitter T in an associated T/R module which feeds an appropriate signal to its associated antenna element. Signals received by each antenna element are applied to a receive section R in a r/R module and then, from the receiver, to an associated opto-electronic interface where they are converted to optical signals and transferred by optical fibers in a second group of optical fibers to a second optical coupler that transfers those signals to the first opto-electronic interface. The first opto-electronic interface then converts those received optical signals into electrical signals that are applied to receiver Rx in the Tx/Rx equipment. This design allows for the use of a single high power laser as an optical carrier whose light can be remoted (i.e. distributed)to all the opto-electronic interfaces so that the optical carrier at each will be of the same wavelength.
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