Patent ID: 11888218
Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A monopole, dipole or patch antenna comprising:
one or two planar metal pieces formed on a top surface of a substrate and configured to radiate electromagnetic waves;
a ground plane formed on a bottom surface of the substrate;
an off-center metal feed formed in the substrate and configured to supply an electrical signal to the one or two metal pieces, said metal feed being orthogonally connected to the one or two metal pieces;
a planar metal shield structure formed on the top surface of the substrate and electrically separated from the one or two metal pieces on four sides; and
a plurality of tubs formed in the substrate and symmetrically enclosing the one or two metal pieces on the four sides, wherein the tubs are electrically connected between the metal shield structure and the ground plane, and wherein interior sides of the tubs are electroplated to form conductive walls around the one or two metal pieces, such that the conductive walls reflect surface waves in a tub region formed between the conductive walls of the antenna;
wherein said one or two metal pieces are arranged on a center region of the top surface.