Importance

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Abstract

Dielectric body 20 has a back surface 18, a surface of revolution about an axis 9-9. Back surface 18 has the form of a primary reflector of an antenna for transmitting or receiving microwave or millimeter wave electromagnetic radiation. A layer 15 of electrically conductive material is in contact with back surface 18. Dielectric body 20 also has a dome 23, a coaxial surface of revolution. A layer 25 of electrically conductive material is in contact with dome 23. A horn 40 fits on a protrusion 17 of dielectric body 20. Protrusion 17 aligns horn 40 on axis 9-9. The axial dimension of dielectric body 20 maintains the proper spacing between horn 40, conductive layer 25, and conductive layer 15 to enable the assembly to function as an antenna system. In the configuration shown, conductive layer 15, in contact with surface 18, forms a paraboloidal primary reflector. Conductive layer 25 , in contact with dome 23, forms the concave ellipsoidal secondary reflector of a Gregorian antenna system. The system can also be configured as a Newtonian system with a flat secondary reflector or a Cassegrainian system with a convex hyperboloidal secondary reflector. The preferred material for body 20 is a foamed polymer with a low dielectric constant.

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First Claim