Isolation improvement mechanism for dual polarization scanning antennas

A communication system comprising:

• a first communication port;
• a second communication port;
• a first plurality of antennas connected to said first communication port;
• a second plurality of antennas connected to said second communication port;
• a parasitic element;
• and
• a controller connected to said first and second plurality of antennas and said parasitic element, wherein the controller varies the position of said antennas and said parasitic element such that port-to-port isolation of said first and second communication ports is optimized as a function of the position of a scan angle of said first and second plurality of antennas in relation to the position of said parasitic element.

An antenna arrangement comprising:

• an adjustable parasitic element;
• an adjustable antenna element;
• and
• a mechanism coupling said parasitic element and said antenna element, wherein said mechanism varies the positions of said adjustable antenna element and said parasitic element such that the position of the parasitic element is automatically varied based on changes in the position of the antenna element.

An antenna arrangement comprising:

• an adjustable parasitic element providing a canceling signal;
• an adjustable antenna element;
• and
• a mechanism coupling said parasitic element and said antenna element, wherein said mechanism varies the positions of said adjustable parasitic element and said adjustable antenna element such that said canceling signal is automatically varied based on changes in the position of the antenna element.

A dual polarized two port antenna comprising:

• two communication ports;
• a feed line connected to each communications port;
• an antenna beam connected to said ports that may be scanned;
• an adjustable parasitic element providing a canceling signal;
• and
• a mechanism coupling said parasitic element and said antenna beam, wherein, said mechanism automatically varies the position of the parasitic element based on the position of the antenna beam.