Patent ID: 9748657
Date: 2017-08-29
CPC Classifications: H01Q

Claim:
1. An antenna structure comprising: a driven dipole antenna structure; and a parasitic folded dipole antenna structure that partially defines an enclosed space and, in operation, is electromagnetically coupled to the driven dipole antenna; wherein the parasitic folded dipole antenna structure comprises: (a) a base segment that extends from a base segment first terminal end to a base segment second terminal end, (b) a first and second gap segments that each extend from a first gap segment terminal end to a second gap segment terminal end, (c) a first side segment that extends from the base segment first terminal end to the second gap segment terminal end of the first gap segment, and (d) a second side segment that extends from the base segment second terminal end to second gap segment terminal end of the second gap segment; wherein the parasitic folded dipole antenna structure defines a gap that extends between the first gap segment terminal ends of the first and second gap segments; wherein the base segment, first and second gap segments, first and second side segments, and a straight, imaginary line or flat, imaginary plane extending from the first gap segment terminal end of the first gap segment to the first gap segment terminal end of the second gap segment define the enclosed space; wherein the driven dipole antenna structure is entirely located within the enclosed space defined by the parasitic folded dipole antenna structure and the straight, imaginary line or flat, imaginary plane; wherein the driven dipole antenna structure extends from a first outer end to a second outer end of the driven dipole antenna structure and has a length L wherein the gap has a length L wherein the length L wherein the parasitic folded dipole antenna has a total length L wherein the ratio of L