Abstract: The invention provides a ceramic patch antenna structure which comprises a composite material base body, a radiation metallic layer, a grounding metallic layer and a signal feeding element. The composite material base body is composed of a high dielectric constant (K) material and a low K material, having a front surface, a rear surface and a through hole. The radiation metallic layer is provided on the front surface of the composite material base body. The grounding metallic layer is provided on the rear surface of the composite material base body. The signal feeding element has a head thereon, the head has a shaft extending from the bottom thereof and the shaft has a projection on a surface thereof. As 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.