Ceramic patch antenna structure

A ceramic patch antenna structure, comprising:

• a composite material base body, composed of a high K material and a low K material, having a front surface, a rear surface and a sinking portion extending to have a through hole going through composite material base body;
• a signal feeding element, provided in the through hole, having a head thereon, and the head having a shaft extending from the bottom thereof, the shaft having a projection on a surface thereof;
• a radiation metallic layer, provided on the front surface of the composite material base body;
• and
• a grounding metallic layer, provided on the rear surface of the composite material base body, having an opening corresponding to the through hole, and the opening having an internal diameter greater than the through hole thereof,
• wherein the signal feeding element is screwed to the through hole, the projection of the shaft destroys an internal wall of the through hole to latch in the through hole, the head is provided in the sinking portion and electrically connected with the radiation metallic layer on the front surface of the composite material base body, and an end of the shaft passes through the through hole and the opening without contacting with the grounding metallic layer.