| 摘要 |
A beam-forming network (BFN) for an emitting array antenna, having NB ≥1 beam ports (BP), each corresponding to an antenna beam, and NE ≥1 antenna ports (AP), each corresponding to an antenna element, the network comprising: a multi-beam network (MBN) having at least NB input ports connected to respective beam ports of the beam-forming network and at least N0SA>1 output ports, for associating to each said output port a linear combination of input signals from respective input ports; a set of at least NOSA lossless single-mode networks (SMN), each having an input port (OSA-IP) connected to a respective output port of said multi-beam network and at least NNOSA osa>1 output ports, for associating to each said output port a signal obtained by weighting an input signal from said input port; and a set of at least NN0SA lossless multi-mode networks (MMN), each having at least NNOSA OSA input ports (NOSA-IP), each one connected to an output port of a respective single- mode network, and at least NN0SA E>1 output ports connected to respective antenna ports of the beam-forming network, for associating to each said output port a linear combination of input signals from respective input ports. An array antenna comprising NE antenna elements and a beam-forming network as described above, whose antenna ports are connected to said antenna elements. |
