Nested concentric coaxial feed assembly for ground antennas supporting multiple frequency bands

A nested concentric coaxial feed assembly of a multi-band ground antenna for supporting multiple frequency bands, comprising

• an elongated housing configured to enclose one or more antenna components;
• a feed cone attached at one end of said elongated housing, wherein the feed cone comprises:
• a circular horn open-ended waveguide located on a central axis of said feed cone;
• a first coaxial cylinder encircling said circular horn open-ended waveguide, thereby forming an intermediate waveguide, which is bounded between said first coaxial cylinder and said circular horn open ended waveguide;
• and
• a second coaxial cylinder encircling said first coaxial cylinder, thereby forming an outermost waveguide, which is bounded between said second coaxial cylinder and said first coaxial cylinder;
• and
• a sub-reflector located at a distal end of said feed cone having an outer rim supported by one or more sub-reflector supports, wherein the sub-reflector having an inner reflecting surface that is shaped to minimize RF blockage effects and improve gain of the multi-band ground antenna.

A method for operating a multi-band ground antenna to support multiple frequency bands using a nested concentric coaxial feed assembly, comprising:

• selecting a desired frequency band based on a required communication channel;
• directing signals through a corresponding waveguide based on a frequency coverage;
• utilizing one or more integrated components within a feed cone for signal processing and transmission or reception;
• and
• maintaining continuous bandwidth, dual polarization, and tracking capability across all supported frequency bands.