Antenna feed network to produce both linear and circular polarizations

An antenna feed network comprising:

• a septum polarizer including a waveguide defining a cavity, wherein a septum is disposed in the cavity to divide the cavity to form a first port and a second port, the septum having a stepped configuration;
• a first diplexer in signal communication with the first port of the septum polarizer to route a signal based upon a frequency;
• a second diplexer in signal communication with the second port of the septum polarizer to route a signal based upon a frequency;
• and
• a wave coupler/splitter in signal communication with the diplexer to send and receive signals therebetween, the wave coupler/splitter including a first signal path and a second signal path, wherein the wave coupler/splitter controls a phase shift of a signal transmitted through at least one of the first signal path and the second signal path.

An antenna feed network comprising:

• a septum polarizer including a waveguide defining a cavity, wherein a septum having a stepped configuration is disposed in the cavity to divide the cavity to form a first port and a second port;
• a first diplexer including a common port in signal communication with the first port of the septum polarizer to route a signal based upon a frequency, wherein first diplexer further includes a first polarizer port having a first pre-determined passband frequency and a second polarizer port having a second pre-determined passband frequency, each of the first polarizer port and the second polarizer port of the first diplexer in signal communication with the first port of the septum polarizer;
• a second diplexer including a common port in signal communication with the second port of the septum polarizer to route a signal based upon a frequency, wherein second diplexer further includes a first polarizer port having a first pre-determined passband frequency and a second polarizer port having a second pre-determined passband frequency, each of the first polarizer port and the second polarizer port of the second diplexer in signal communication with the second port of the septum polarizer;
• and
• a wave coupler/splitter in signal communication with the diplexer to send and receive signals therebetween, the wave coupler/splitter including a first signal path and a second signal path, wherein the wave coupler/splitter controls a phase shift of a signal transmitted through at least one of the first signal path and the second signal path.