Low profile multi band antenna system

A system comprising:

• (a) a main-reflector (104):
• (i) having a first parabolic shape (104HP) in an elevation direction, and
• (ii) having a second parabolic shape (104WP) in an azimuth direction, said first shape different from said second shape,
• (b) a sub-reflector (102):
• (i) having a first concave shape (102HP) in said elevation direction, and
• (c) a feed (100),
• said main-reflector in an azimuth plane is focused on said sub-reflector in a Cassegrain configuration, and in an elevation plane is focused on said sub-reflector in a Gregorian configuration, said main-reflector and said sub-reflector cooperating to focus an incoming target-beam of radiation on said feed.

A method for antenna positioning comprising:

• (a) tilting a main-reflector (104) relative to a sub-reflector (102), and
• (b) positioning said main-reflector relative to said sub-reflector (102), said positioning determined based on said tilting,
• said main-reflector and said sub-reflector cooperating to focus an incoming target-beam of radiation on a feed,
• said main-reflector (104):
• (i) having a first parabolic shape (104HP) in a first direction, and (ii) having a second parabolic shape (104WP) in a second direction, said first shape different from said second shape, said first and second directions orthogonal,
• said sub-reflector (102):
• (i) having a first concave shape (102HP) in said first direction,
• wherein said first direction corresponds to an elevation direction and said second direction corresponds to an azimuth direction, and
• wherein said main-reflector in the azimuth plane is arranged in a Cassegrain configuration, and in the elevation plane is arranged in a Gregorian configuration.

A method for antenna positioning comprising:

• (a) tilting a main-reflector (104) relative to a sub-reflector (102), and
• (b) positioning said main-reflector relative to said sub-reflector (102), said positioning determined based on said tilting,
• said main-reflector and said sub-reflector cooperating to focus an incoming target-beam of radiation on a feed,
• said main-reflector (104) having a first parabolic shape (104HP) in a first direction, and having a second parabolic shape (104WP) in a second direction, said first parabolic shape (104HP) different from said second parabolic shape (104WP), said first and second directions orthogonal, said first direction corresponding to an elevation direction and said second direction corresponding to an azimuth direction,
• said sub-reflector (102) having a first concave shape (102HP) in said first direction,
• said main-reflector first parabolic shape (104HP) having a corresponding first focus (90N) of an incoming target beam,
• said main-reflector second parabolic shape (104WP) having a corresponding second focus (90C) of an incoming target beam,
• said sub-reflector (102) concave shape (102HP) is effectively elliptical and in the elevation direction having corresponding third focus (90T) and fourth focus (90G), and
• said feed (100) having a feed horn ISO phase center (90F), said first focus (90N) coincident with said fourth focus (90G), and said third focus (90T) coincident with said feed horn ISO phase center (90F).

A controller operational for:

• (i) tilting a main-reflector (104) relative to a sub-reflector (102), said tilting at a tilt angle, said tilt angle relative to a linear axis and a main-reflector normal line,
• said main-reflector (104) having a first parabolic shape (104HP) in in an elevation direction, and having a second parabolic shape (104WP) in an azimuth direction, said first shape different from said second shape,
• said sub-reflector (102) having a first concave shape (102HP) in said elevation direction,
• said main-reflector (104) in the azimuth plane arranged in a Cassegrain configuration, and in the elevation plane arranged in a Gregorian configuration, and
• (ii) positioning said main-reflector relative to said sub-reflector (102), said positioning being a spacing (124) between an origin (120) and an axis normal (122), said spacing being a distance determined based on said tilting,
• (iii) said tilting and positioning configuring said main-reflector and said sub-reflector to cooperate to focus an incoming target-beam of radiation on a feed.