Surrounded antenna having a phase shifter therein

Abstract

A surrounded antenna includes a radiation patch comprising a closed slot and a surface current path of a predetermined width surrounding the closed slot; a phase shifter comprising at least one short-circuit path (short stub) segment and at least one open path (open stub) segment, each short-circuit path (short stub) segment being connected between two internal contacts of the surface current path, each open path (open stub) segment comprising opposing connection end and open end, the connection end being to the surface current path; a grounded patch spaced apart from the radiation patch at a predetermined distance; and a feeding point located at one short-circuit path (short stub) segment and connected to the grounded patch through at least one hole. Thus, the phase shifter can offset the phase between surface current paths, achieving in-phase radio signal strength enhancement.

Dependencies are inferred from the claim text.