Slot antenna structure and slot antenna device including the same

A slot antenna device, comprising:

• a signal input device;
• a metal trough, wherein the metal trough includes a metal bottom plate, two metal sidewalls standing upright on and along two opposite long sides of the metal bottom plate respectively, and two metal closing walls standing upright on and along two opposite short sides of the metal bottom plate respectively, and the metal trough further includes an opening formed and surrounded by the two metal sidewalls and the two metal closing walls;
• and
• two metal plates provided on the opening of the metal trough, with a slot formed between the two metal plates, wherein the slot extends in a straight line, has two ends located on top of the two metal closing walls respectively, and thereby separates the two metal plates, an electrical unit is provided on the two metal plates and astride the slot, the electrical unit is connected to the two metal plates and is electrically connected to the signal input device, the two metal plates and the metal trough form a resonance chamber in communication with the slot, and a depth from the opening to an inner bottom side of the metal trough is generally one eighth of a wavelength of an input signal input by the signal input device.