Dielectric Waveguide Slot Antenna

A dielectric waveguide slot antenna comprising:

• a dielectric waveguide having a slot 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 formed therein at a position opposed to the slot, the via hole having approximately the same shape as that of the slot;
• and
• a conductor plate having a first through-hole formed therein at a position opposed to the via hole, and a pair of second through-holes formed in a vicinity of the first through-hole, the first through-hole having approximately the same shape as that of the via hole, 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;
• the printed circuit board has a conductor layer formed in positions facing to the second through-holes;
• and
• the second through-holes are arranged point-symmetrically with each other with respect to the center of the first through-hole, and rotated with respect to the longitudinal direction of the first through-hole.