Abstract: An antenna device comprising a first radiation layer, a second radiation layer, a first dielectric layer, a second dielectric layer, and an excitation layer. The first radiation layer includes a first radiator, the second radiation layer includes a second radiator, the first dielectric layer includes a first hole, the second dielectric layer includes a second hole, and the excitation layer includes an excitation unit. The excitation unit is configured to excite the first radiator and the second radiator, causing the first radiator and the second radiator to radiate. The excitation layer, the first dielectric layer, the first radiation layer, the second dielectric layer, and the second radiation layer are sequentially stacked along a stacking direction. The excitation unit, the first hole, the first radiator, the second hole, and the second radiator are aligned along the stacking direction.

Abstract: A dielectric resonator, a dielectric resonator array structure, and an antenna structure are provided. The dielectric resonator includes a resonator body and a transmission layer that are integrally formed and respectively with a plurality of grooves and a plurality of through holes. Each through hole and its corresponding groove jointly form a hollow structure. The dielectric resonator array structure includes a plurality of dielectric resonators arranged in different directions. The antenna structure includes a circuit board, a first feed line, a second feed line, a ground layer with a cross-shaped slot, and a dielectric resonator. The first feed line and the second feed line are embedded in the circuit board. The ground layer is disposed on a surface of the circuit board. The first feed line and the second feed line are separated from and coupled to the cross-shaped slot, to excite the dielectric resonator.

Abstract: An antenna module, a metamaterial structure and an electronic device are provided. The electronic device includes a housing, a glass material layer and an antenna module. The antenna module includes a substrate, at least one radiating element and a metamaterial structure. The metamaterial structure includes a metamaterial substrate, a plurality of first metal conductors, and a plurality of second metal conductors. The first metal conductors are disposed on the first surface of the metamaterial substrate and are spaced apart at intervals from each other, and the second metal conductors are disposed on the second surface of the metamaterial substrate and are spaced apart at intervals from each other. The first metal conductors respectively correspond to the second metal conductors. Shapes of the first metal conductors are different from shapes of the second metal conductors.

Abstract: An antenna module, a metamaterial structure and an electronic device are provided. The electronic device includes a housing, a glass material layer and an antenna module. The antenna module includes a substrate, at least one radiating element and a metamaterial structure. The metamaterial structure includes a metamaterial substrate, a plurality of first metal conductors, and a plurality of second metal conductors. The first metal conductors are disposed on the first surface of the metamaterial substrate and are spaced apart at intervals from each other, and the second metal conductors are disposed on the second surface of the metamaterial substrate and are spaced apart at intervals from each other. The first metal conductors respectively correspond to the second metal conductors. Shapes of the first metal conductors are different from shapes of the second metal conductors.

Abstract: The present invention provides a camera device comprising a housing, an image sensing unit, an optical unit and a neutral density filter assembly. The housing has a light entrance. The image sensing unit is disposed in the housing. The optical unit is disposed between the light entrance and the image sensing unit. Light enters the housing through the light entrance and forms an image at the image sensing unit via the optical unit. The neutral density filter assembly is disposed between the light entrance and the optical unit and includes a first neutral density filter layer and a second neutral density filter layer. The first neutral density filter layer and the second neutral density filter layer are disposed along the direction in which the light is transmitted.