MULTIPLE FEEDS PER BEAM ANTENNA ARRAY FEED SYSTEM USING A QUASI-PERIODIC MULTI-PORT COUPLER

The invention provides a multiple feeds per beam antenna array feed system using a quasi-periodic multi-port coupler. The multiple feeds per beam antenna array feed system comprises a quasi-periodic multi-port coupler and an antenna array. The quasi-periodic multi-port coupler is adapted and arranged to distribute power from an input port of at least two input ports to the output port corresponding to the input port and to two output ports adjacent to the output port corresponding to the input port. The antenna array is connected to the quasi-periodic multi-port coupler. The antenna array is further adapted and arranged to be fed by or to feed the quasi-periodic multi-port coupler. The antenna array is further adapted and arranged to transmit or receive at least two beams. The antenna array comprises a plurality of antennas. Each antenna of the plurality of antennas is adapted and arranged to transmit or receive an electromagnetic wave having a same polarization. A combination of electromagnetic waves transmitted or received by a subset of the plurality of antennas forms one of the at least two beams. Exactly one antenna, for example per quasi-periodic multi-port coupler, of the subset is used as a common antenna with respect to two beams of the at least two beams to be transmitted or received by the antenna array.