Phase shift device and method

A method comprising:

• extracting a first electromagnetic (EM) signal, a second EM signal, a third EM signal, and a fourth EM signal from an input EM signal;
• shifting the phase of the first and the third EM signals by about 180 degrees with respect to the second and fourth EM signals;
• and
• combining the first, second, third, and fourth EM signals to provide an output EM signal.

An antenna system comprising:

• an antenna having a feed horn;
• an orthomode transducer;
• and
• a phase shift device disposed between said antenna and said orthomode transducer, said phase shift device including:
• an input quadrature junction configured to receive an input electromagnetic (EM) signal and extract a first EM signal, a second EM signal, a third EM signal, and a fourth EM signal from the input EM signal,
• a first waveguide arm operatively connected to said input quadrature junction to convey the first EM signal therethrough,
• a second waveguide arm operatively connected to said input quadrature junction to convey the second EM signal therethrough,
• a third waveguide arm operatively connected to said input quadrature junction to convey the third EM signal therethrough,
• a fourth waveguide arm operatively connected to said input quadrature junction to convey the fourth signal therethrough,
• wherein at least two of said first, second, third and fourth waveguide arms are configured to shift the phase of the first and third EM signals conveyed therethrough such that the first and third EM signals are phase shifted by about 180 degrees with respect to the second and fourth EM signals, and
• an output quadrature junction operatively connected to said first, second, third, and fourth waveguide arms to combine the first, second, third, and fourth EM signals.