Dual mode omni / directional sectored array

A communication system comprising:

• an antenna comprising:
• a plurality of pillbox structures, each including:
• at least one radiating element;
• a first reflector disposed to reflect a signal from the radiating element;
• and
• a second reflector disposed to reflect the signal from the first reflector, the second reflector being a parabolic reflector configured to produce a planar wave;
• and
• a feed layer comprising:
• a plurality of switches, each associated with a pillbox structure in the plurality of pillbox structures;
• and
• a plurality of transmit/receive modules, each associated with a pillbox structure in the plurality of pillbox structures,
• wherein:
• the plurality of pillbox structures are disposed around an axis.

An omnidirectional communication system comprising:

• an antenna comprising at least two stacked layers:
• a first layer comprising a first set of pillbox structures, each including:
• at least one radiating element;
• a first reflector disposed to reflect a signal from the radiating element;
• and
• a second reflector disposed to reflect the signal from the first reflector, the second reflector being a parabolic reflector configured to produce a planar wave;
• a second layer comprising a second set of pillbox structures, each including:
• at least one radiating element;
• a first reflector disposed to reflect a signal from the radiating element;
• and
• a second reflector disposed to reflect the signal from the first reflector, the second reflector being a parabolic reflector configured to produce a planar wave;
• and
• a feed layer comprising:
• a plurality of switches, each associated with a pillbox structure in the first set of pillbox structures or the second set of pillbox structures;
• and
• a plurality of transmit/receive modules, each associated with a pillbox structure in the first set of pillbox structures or the second set of pillbox structures,
• wherein:
• the first set of pillbox structures are disposed around an axis and with a first surface proximal to the feed layer and a second surface distal to the feed layer;
• and
• the second set of pillbox structures are disposed around the axis and with a first surface proximal to the second surface of the first set of pillbox structures.