Abstract: A communication device includes a dielectric substrate, an antenna layer, a metamaterial layer, a first absorber element, a second absorber element, and a third absorber element. The dielectric substrate has a first surface and a second surface which are opposite to each other. The antenna layer is disposed on the first surface of the dielectric substrate. The metamaterial layer is adjacent to the antenna layer. The antenna layer and the metamaterial layer are both positioned between the first absorber element and the second absorber element. The third absorber element is disposed on the second surface of the dielectric substrate.

Abstract: A reflector structure is configured to connect an antenna. The antenna has an excitation source. The reflector structure includes a metal substrate, at least one first flat plate and a second flat plate. The metal substrate is configured to reflect the radiation of the antenna. The at least one first flat plate is disposed on the metal substrate. The second flat plate is floated to the metal substrate along a virtual normal and completely separated from the at least one first flat plate to form a closed slot. A cavity is formed by the metal substrate, the at least one first flat plate and the second flat plate and communicated with the closed slot. The excitation source is projected onto a plane to form an excitation source region. The excitation source region is located in the second flat plate.

Abstract: A wireless communication device is provided. The wireless communication device includes a circuit substrate, an antenna cover, a first antenna array and a first power divider. The first antenna array is arranged between the circuit substrate and the antenna cover. The first antenna array includes two first antenna elements and two second antenna elements. The first antenna elements are disposed on a first surface of the circuit substrate. The second antenna elements are arranged on the antenna cover and correspond to the first antenna elements, respectively. Each of the second antenna elements and a corresponding one of the first antenna elements are separated from and coupled to each other. In response to the two first antenna elements being fed with a first signal provided by a signal source from the first power divider, the first antenna array is configured to generate a radiation pattern having a first polarization direction.

Abstract: A reflector structure is configured to connect an antenna. The antenna has an excitation source. The reflector structure includes a metal substrate, at least one first flat plate and a second flat plate. The metal substrate is configured to reflect the radiation of the antenna. The at least one first flat plate is disposed on the metal substrate. The second flat plate is floated to the metal substrate along a virtual normal and completely separated from the at least one first plate to form a closed slot. A cavity is formed by the metal substrate, the at least one first flat plate and the second flat plate and communicated with the closed slot. The excitation source is projected onto a plane to form an excitation source region. The excitation source region is located in the second flat plate.

Abstract: A transition device includes a first metal layer, a signaling metal line, an excitation metal piece, a first dielectric layer, a plurality of conductive via elements, a reflector, and a waveguide. The first metal layer has a notch. The notch extends to the interior of the first metal layer, forming a first slot region. The signaling metal line is disposed in the notch. The excitation metal piece is disposed in the first slot region and is coupled to the signaling metal line. The first dielectric layer has a pair of first openings. The first dielectric layer includes a bridging portion disposed between the first openings. The bridging portion is configured to carry the excitation metal piece. The conductive via elements penetrate the first dielectric layer and are coupled to the first metal layer. The conductive via elements at least partially surround the first slot region.

Abstract: An antenna system includes at least one antenna array. The antenna array includes a dielectric substrate, a ground plane, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a first feeding element, and a second feeding element. The second radiation element is adjacent to the first radiation element. The first radiation element is positioned between the second radiation element and the ground plane. The fourth radiation element is adjacent to the third radiation element. The third radiation element is positioned between the fourth radiation element and the ground plane. The first feeding element is coupled to a first connection point on the first radiation element and a second connection point on the third radiation element. The second feeding element is coupled to a third connection point on the first radiation element and a fourth connection point on the third radiation element.

Abstract: An antenna system for receiving and transmitting wireless signals includes a first complex antenna including a first reflection element, a first antenna array and a second antenna array; a second complex antenna including a second reflection element, a third antenna array and a fourth antenna array, wherein the first reflection element and the second reflection element are fixed to form an included angle to each other; and a feeding device, coupled to the first complex antenna and the second complex antenna, for alternately outputting radio-frequency signals to the first complex antenna and the second complex antenna, to emit wireless signals via the first complex antenna and the second complex antenna, and switching phases of the radio-frequency signals outputted to the first complex antenna and the second complex antenna, to change characteristics of beam generated by the first complex antenna and the second complex antenna in a vertical plane.

Abstract: An antenna structure includes a radiation metal element, a first feeding metal element, a second feeding metal element, a metal loop, a ground metal element, a first dielectric layer, a second dielectric layer, and a via metal element. The radiation metal element has a first slot, a second slot, a third slot, and a fourth slot, which surround a first opening, a second opening, a third opening, and a fourth opening. The first feeding metal element extends into the first opening. The second feeding metal element extends into the second opening. The first dielectric layer is disposed between the radiation metal element and the metal loop. The second dielectric layer is disposed between the metal loop and the ground metal element. The via metal element couples a first connection point on the radiation metal element to a second connection point on the ground metal element.

Abstract: An antenna system includes at least one antenna array. The antenna array includes a dielectric substrate, a ground plane, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a first feeding element, and a second feeding element. The second radiation element is adjacent to the first radiation element. The first radiation element is positioned between the second radiation element and the ground plane. The fourth radiation element is adjacent to the third radiation element. The third radiation element is positioned between the fourth radiation element and the ground plane. The first feeding element is coupled to a first connection point on the first radiation element and a second connection point on the third radiation element. The second feeding element is coupled to a third connection point on the first radiation element and a fourth connection point on the third radiation element.

Abstract: An antenna structure includes a dielectric substrate, a ground plane, and a main radiation element. The main radiation element and the ground plane are disposed on two opposite surfaces of the dielectric substrate. The main radiation element has a first loop-shaped slot and a second loop-shaped slot. The first loop-shaped slot is inside the second loop-shaped slot. The first loop-shaped slot includes a first slot, a second slot, a third slot, a fourth slot, a pair of first partition slots, a pair of second partition slots, a pair of third partition slots, and a pair of fourth partition slots. The first slot, the second slot, the third slot, and the fourth slot are interleaved with the first partition slots, the second partition slots, the third partition slots, and the fourth partition slots.

Abstract: An antenna system for receiving and transmitting wireless signals includes a first complex antenna including a first dielectric layer, a first metal grounding sheet, first to fourth antenna arrays and a first transmission line device for transmitting radio-frequency signals to the first to fourth antenna arrays, a second complex antenna including a second dielectric layer, a second metal grounding sheet, fifth to eighth antenna arrays and a second transmission line device for transmitting radio-frequency signals to the fifth to eighth antenna arrays, and a feeding device, for alternatively outputting radio-frequency signals to the first complex antenna and the second complex antenna via the first and second transmission line devices, and switching phases of the radio-frequency signals outputted to the first to eighth antenna arrays.

Abstract: An antenna structure includes a radiation metal element, a first feeding metal element, a second feeding metal element, a metal loop, a ground metal element, a first dielectric layer, a second dielectric layer, and a via metal element. The radiation metal element has a first slot, a second slot, a third slot, and a fourth slot, which surround a first opening, a second opening, a third opening, and a fourth opening. The first feeding metal element extends into the first opening. The second feeding metal element extends into the second opening. The first dielectric layer is disposed between the radiation metal element and the metal loop. The second dielectric layer is disposed between the metal loop and the ground metal element. The via metal element couples a first connection point on the radiation metal element to a second connection point on the ground metal element.

Abstract: A smart antenna assembly includes a first smart antenna device including a first polarization antenna, a second polarization antenna, a first switch unit, a first control terminal and a second control terminal. The first polarization antenna includes a first antenna, a first reflection element and a second reflection element. The second polarization antenna includes a second antenna, a third reflection element and a fourth reflection element. The first switch unit includes a first switch element electrically connected with the first reflection element, a second switch element electrically connected with the second reflection element, a third switch element electrically connected with the third reflection element, and a fourth switch element electrically connected with the fourth reflection element. The first control terminal is used to turn on the first and third switch elements. The second control terminal is used to turn on the second and fourth switch elements.

Abstract: A transition device includes a first metal layer, a signaling metal line, an excitation metal piece, a first dielectric layer, a plurality of conductive via elements, a reflector, and a waveguide. The first metal layer has a notch. The notch extends to the interior of the first metal layer, forming a first slot region. The signaling metal line is disposed in the notch. The excitation metal piece is disposed in the first slot region and is coupled to the signaling metal line. The first dielectric layer has a pair of first openings. The first dielectric layer includes a bridging portion disposed between the first openings. The bridging portion is configured to carry the excitation metal piece. The conductive via elements penetrate the first dielectric layer and are coupled to the first metal layer. The conductive via elements at least partially surround the first slot region.

Abstract: An antenna structure includes a dielectric substrate, a ground plane, and a main radiation element. The main radiation element and the ground plane are disposed on two opposite surfaces of the dielectric substrate. The main radiation element has a first loop-shaped slot and a second loop-shaped slot. The first loop-shaped slot is inside the second loop-shaped slot. The first loop-shaped slot includes a first slot, a second slot, a third slot, a fourth slot, a pair of first partition slots, a pair of second partition slots, a pair of third partition slots, and a pair of fourth partition slots. The first slot, the second slot, the third slot, and the fourth slot are interleaved with the first partition slots, the second partition slots, the third partition slots, and the fourth partition slots.

Abstract: An antenna system for receiving and transmitting wireless signals includes a first complex antenna including a first reflection element, a first antenna array and a second antenna array; a second complex antenna including a second reflection element, a third antenna array and a fourth antenna array, wherein the first reflection element and the second reflection element are fixed to form an included angle to each other; and a feeding device, coupled to the first complex antenna and the second complex antenna, for alternately outputting radio-frequency signals to the first complex antenna and the second complex antenna, to emit wireless signals via the first complex antenna and the second complex antenna, and switching phases of the radio-frequency signals outputted to the first complex antenna and the second complex antenna, to change characteristics of beam generated by the first complex antenna and the second complex antenna in a vertical plane.

Abstract: An antenna system for receiving and transmitting wireless signals includes a first complex antenna including a first dielectric layer, a first metal grounding sheet, first to fourth antenna arrays and a first transmission line device for transmitting radio-frequency signals to the first to fourth antenna arrays, a second complex antenna including a second dielectric layer, a second metal grounding sheet, fifth to eighth antenna arrays and a second transmission line device for transmitting radio-frequency signals to the fifth to eighth antenna arrays, and a feeding device, for alternatively outputting radio-frequency signals to the first complex antenna and the second complex antenna via the first and second transmission line devices, and switching phases of the radio-frequency signals outputted to the first to eighth antenna arrays.

Abstract: An antenna system includes a dual-polarized antenna, a metal reflection plate, a first metal bending structure, and a second metal bending structure. The metal reflection plate is configured to reflect the radiation energy from the dual-polarized antenna. The first metal bending structure includes a first planar portion and a second planar portion. The second planar portion is coupled through the first planar portion to a first edge of the metal reflection plate. The first planar portion and the second planar portion are not parallel to each other. The second metal bending structure includes a third planar portion and a fourth planar portion. The fourth planar portion is coupled through the third planar portion to a second edge of the metal reflection plate. The third planar portion and the fourth planar portion are not parallel to each other.

Abstract: A smart antenna assembly includes a first smart antenna device including a first polarization antenna, a second polarization antenna, a first switch unit, a first control terminal and a second control terminal. The first polarization antenna includes a first antenna, a first reflection element and a second reflection element. The second polarization antenna includes a second antenna, a third reflection element and a fourth reflection element. The first switch unit includes a first switch element electrically connected with the first reflection element, a second switch element electrically connected with the second reflection element, a third switch element electrically connected with the third reflection element, and a fourth switch element electrically connected with the fourth reflection element. The first control terminal is used to turn on the first and third switch elements. The second control terminal is used to turn on the second and fourth switch elements.

Abstract: A complex antenna for receiving and transmitting radio signals, includes four unit antennas, circularly arranged along a circle, for receiving and transmitting radio signals of a first frequency band; four side walls, respectively disposed between two adjacent unit antennas of the four unit antennas; and a plurality of side-wall antennas, disposed on the four side walls, for receiving and transmitting radio signals of a second frequency band.