Beamforming circuit for multiple antennas

A method of multi-antenna wireless communication, comprising:

• selecting one or more input ports of a first layer two-dimensional (2D) Butler matrix for communication of one or more streams by an array antenna over one or more beams;
• applying a control signal to a control input pin of a first layer to second layer switch configurable, based on the control signal, to selectively connect first layer output ports of the first layer 2D Butler matrix to at least a subset of second layer input ports of a second layer 2D Butler matrix;
• and
• transmitting or receiving one or more streams by an array antenna over one or more beams, wherein the array antenna includes a plurality of antenna elements, wherein each one of the plurality of antenna elements is associated with one output port of the second layer 2D Butler matrix.

An apparatus comprising:

• a transceiver:
• a memory configured to store instructions;
• and
• one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to perform multi-antenna wireless communication comprising:
• selecting one or more input ports of a first layer two-dimensional (2D) Butler matrix for communication of one or more streams by an array antenna over one or more beams;
• applying a control signal to a control input pin of a first layer to second layer switch configurable, based on the control signal, to selectively connect first layer output ports of the first layer 2D Butler matrix to at least a subset of second layer input ports of a second layer 2D Butler matrix;
• and
• transmitting or receiving one or more streams by an array antenna over one or more beams, wherein the array antenna includes a plurality of antenna elements, wherein each one of the plurality of antenna elements is associated with one output port of the second layer 2D Butler matrix.

A non-transitory computer-readable medium comprising code executable by one or more processors to perform multi-antenna wireless communication comprising:

• selecting one or more input ports of a first layer two-dimensional (2D) Butler matrix for communication of one or more streams by an array antenna over one or more beams;
• applying a control signal to a control input pin of a first layer to second layer switch configurable, based on the control signal, to selectively connect first layer output ports of the first layer 2D Butler matrix to at least a subset of second layer input ports of a second layer 2D Butler matrix;
• and
• transmitting or receiving one or more streams by an array antenna over one or more beams, wherein the array antenna includes a plurality of antenna elements, wherein each one of the plurality of antenna elements is associated with one output port of the second layer 2D Butler matrix.

An apparatus for multi-antenna wireless communication, comprising:

• means for selecting one or more input ports of a first layer two-dimensional (2D) Butler matrix for communication of one or more streams by an array antenna over one or more beams;
• means for applying a control signal to a control input pin of a first layer to second layer switch configurable, based on the control signal, to selectively connect first layer output ports of the first layer 2D Butler matrix to at least a subset of second layer input ports of a second layer 2D Butler matrix;
• and
• means for transmitting or receiving one or more streams by an array antenna over one or more beams, wherein the array antenna includes a plurality of antenna elements, wherein each one of the plurality of antenna elements is associated with one output port of the second layer 2D Butler matrix.