Patent ID: 9373892
Filing Date: 2016-06-21
CPC Classification: H01Q

Claim Text:
1. A dielectric waveguide comprising: a dielectric waveguide having a slot of elongate shape through which a dielectric is exposed in a part of an electrically conductive film formed on a surface of the dielectric waveguide; a printed circuit board having a via hole of elongate shape formed therein at a position opposed to the slot; and a conductor plate having a first through-hole of elongate shape formed therein at a position opposed to the via hole, and a pair of second through-holes of elongate shape formed in a vicinity of the first through-hole, wherein the first through-hole and the second through-holes are in the same plane; wherein the first through-hole is fed with electric power while the second through-holes are not fed with electric power; wherein the dielectric waveguide, the printed circuit board and the conductor plate are joined together with aligning the slot, the via hole and the first through-hole with each other; wherein the printed circuit board has a conductor layer formed in positions facing to the second through-holes; wherein the pair of second through-holes are arranged point-symmetrically with each other with respect to the center of the first through-hole and are not aligned symmetrically with respect to a line orthogonal to a longitudinal direction of the first through-hole, and are rotated with respect to the longitudinal direction of the first through-hole; wherein a rotation angle of each of the pair of second through-holes is about 45° with respect to the longitudinal direction of the first through-hole; wherein the second through-holes have a longitudinal length of about 1.4 times as long as a longitudinal length of the first through-hole; and wherein the dielectric waveguide radiates a circular polarized wave.