Patent ID: 6329957
Filing Date: 2001-12-11
Classification: H01P,H01Q

Abstract:
An antenna feed system, comprising:a first waveguide which coaxially lies along a central axis and a first junction coaxially coupled to the first waveguide;a second waveguide which coaxially lies along the central axis and a second junction coaxially coupled to the second waveguide;a third waveguide which coaxially lies along the central axis and a third junction coaxially coupled to the third waveguide;wherein the first, second, and third waveguides a re each configured to independently transmit, during a first time period, electromagnetic radiation in a particular frequency band simultaneously;wherein the first, second, and third junctions are disposed to propagate electromagnetic radiation into and out of the respective first, second, and third waveguides;wherein each junction comprises four equally spaced coupling ports, wherein each of the coupling ports is configured to propagate a different phase of electromagnetic radiation into and out of the respective waveguide;wherein the junctions are sequentially arranged along the central axis and wherein each junction resides at a terminal end of each respective waveguide; andwherein each of the junctions is independently coupled to a plurality of external rectangular waveguides, and wherein each of the external rectangular waveguides are disposed to propagate electromagnetic radiation to and from the respective junction.