Abstract: A splitter includes a common transmission line, a first transmission line, a second transmission line, a third transmission line, a fourth transmission line, a resistor, and a first reactance circuit. The common transmission line is coupled between a common port and a common node. The first transmission line is coupled between a first port and a first node. The second transmission line is coupled between a second port and a second node. The third transmission line is coupled between the common node and the first node. The fourth transmission line is coupled between the common node and the second node. The resistor is coupled between the first node and the second node. The first reactance circuit is coupled between the first node and the second node. The first reactance circuit includes a first inductor and a first capacitor coupled in parallel, but it does not include any resistor.

Abstract: A shield is provided, including a frame and a cover. The frame includes a plurality of frame side walls and a frame top structure. Each frame side wall includes at least one frame side wall wedge. The frame side walls are connected to the frame top structure, and the frame top structure includes at least one cantilever beam. The cover includes a plurality of cover side walls and a cover top structure. Each cover side wall includes at least one cover side wall opening. The frame side wall wedge is adapted to be wedged into the cover side wall opening to restrict the movement of the cover in a first direction. The cover side walls are connected to the cover top structure. The cover top structure includes at least one cover top opening. The cantilever beam is wedged into and abuts the cover top opening.

Abstract: An antenna structure includes a first ground element, a feeding element, a shorting element, a parasitic tuning element, a second ground element, a first parasitic element, a second parasitic element, and a dielectric substrate. The feeding element is coupled through the shorting element to the first ground element. The parasitic tuning element is coupled to the first ground element. The parasitic tuning element is at least partially surrounded by the feeding element, the shorting element, and the first ground element. The second ground element is adjacent to the feeding element. The first parasitic element and the second parasitic element are coupled to the second ground element. The feeding element, the shorting element, the parasitic tuning element, the first parasitic element, the second parasitic element, and at least one of the first ground element and the second ground element are disposed on the dielectric substrate.

Abstract: A mobile device includes a supporting element, a ground element, and an antenna structure. The antenna structure includes a first feeding radiation element, a second feeding radiation element, a first parasitic radiation element, a second parasitic radiation element, and a third parasitic radiation element. The first feeding radiation element and the second feeding radiation element are both coupled to a signal feeding point. Each of the first parasitic radiation element, the second parasitic radiation element, and the third parasitic radiation element is coupled to the ground element. A first coupling gap is formed between the first parasitic radiation element and the first feeding radiation element. A second coupling gap is formed between the second parasitic radiation element and the first feeding radiation element. A third coupling gap is formed between the third parasitic radiation element and the second feeding radiation element.

Abstract: A communication device includes a system ground plane, a signal source, an antenna structure, a radiation adjustment plane, and at least one tuning metal element. The signal source is coupled to the system ground plane. The antenna structure is coupled to the signal source. The radiation adjustment plane is configured to adjust the radiation of the antenna structure. The tuning metal element is disposed adjacent to the antenna structure, and is configured to modify the radiation pattern of the antenna structure.

Abstract: A band-pass filter device includes a waveguide filter, a first circuit board section, a first antenna, a second circuit board section, and a second antenna. The waveguide filter includes a high-pass portion, a connection portion, and a low-pass portion. The first antenna is disposed on the first circuit board section. The second antenna is disposed on the second circuit board section. A wireless signal generated by the first antenna is transmitted through the high-pass portion, the connection portion, and the low-pass portion of the waveguide filter, and then is received by the second antenna.

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 wireless communication device includes a first antenna, a second antenna, a first switching circuit, and a first tunable matching circuit. The first switching circuit is electrically connected to the first antenna, the second antenna, and the first tunable matching circuit. In a first operation mode, the first antenna of the wireless communication device performs signal transmission or reception, an impedance value corresponding to the first tunable matching circuit is adjusted to a first impedance value, and the second antenna is conducted to the first tunable matching circuit through the first switching circuit. In a second operation mode, the second antenna of the wireless communication device performs signal transmission or reception, the impedance value corresponding to the first tunable matching circuit is adjusted to a second impedance value, and the first antenna is conducted to the first tunable matching circuit through the first switching circuit.

Abstract: An electronic device is provided. The electronic device includes a heat source, a heat-conductive member and a heat-dissipating sheet. The heat-conductive member includes a recess, wherein the recess is thermally connected to the heat source. The heat-dissipating sheet is attached to the heat-conductive member, wherein the heat-dissipating sheet covers the recess.

Abstract: A shielding structure is provided. The shielding structure is adapted to be disposed on a circuit board. The shielding structure includes a main beam, a branch beam and a shielding cover. The main beam is affixed to the circuit board, wherein the main beam includes a main beam body and a main beam connection unit, the main beam connection unit is disposed on the main beam body. The branch beam includes a branch beam body and a branch beam connection unit, wherein the branch beam connection unit is disposed on the branch beam body, the branch beam connection unit is connected to the main beam connection unit, and the main beam connection unit is partially located between the branch beam connection unit and the circuit board. The shielding cover includes a cover portion and a surrounding wall which is bent from the cover portion.

Abstract: A wireless communication device includes a first antenna, a second antenna, a first switching circuit, and a first tunable matching circuit. The first switching circuit is electrically connected to the first antenna, the second antenna, and the first tunable matching circuit. In a first operation mode, the first antenna of the wireless communication device performs signal transmission or reception, an impedance value corresponding to the first tunable matching circuit is adjusted to a first impedance value, and the second antenna is conducted to the first tunable matching circuit through the first switching circuit. In a second operation mode, the second antenna of the wireless communication device performs signal transmission or reception, the impedance value corresponding to the first tunable matching circuit is adjusted to a second impedance value, and the first antenna is conducted to the first tunable matching circuit through the first switching circuit.

Abstract: A mobile device includes a metal back cover, a ground metal element, a feeding radiation element, and a dielectric substrate. The metal back cover has a slot. The feeding radiation element has a feeding point, and includes a first feeding branch, a second feeding branch, and a third feeding branch. The second feeding branch and the first feeding branch extend in opposite directions. The third feeding branch and the first feeding branch extend in the same direction. The feeding radiation element has a vertical projection on the metal back cover, and the vertical projection at least partially overlaps the slot. The dielectric substrate is disposed adjacent to the metal back cover. The ground metal element and the feeding radiation element are disposed on the dielectric substrate. An antenna structure is formed by the feeding radiation element and the slot of the metal back cover.

Abstract: An antenna structure includes a dielectric substrate, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a sixth radiation element. The dielectric substrate has an upper surface and a lower surface. The first radiation element, the second radiation element, the fourth radiation element, and the fifth radiation element are disposed on the upper surface of the dielectric substrate. The third radiation element and the sixth radiation element are disposed on the lower surface of the dielectric substrate. A positive feeding point is positioned at an end of the first radiation element. A negative feeding point is positioned at an end of the fourth radiation element. The third radiation element couples the first radiation element to the second radiation element. The sixth radiation element couples the fourth radiation element to the fifth radiation element.

Abstract: An antenna device includes a metal mechanism element, a ground plane, a feeding element, a grounding extension element, and a dielectric substrate. The metal mechanism element has a slot. The feeding element has a feeding point coupled to a signal source. The feeding element extends across the slot. The grounding extension element is coupled to the ground plane. A vertical projection of the grounding extension element at least partially overlaps the slot. An antenna structure is formed by the feeding element, the grounding extension element, and the slot of the metal mechanism element. The antenna structure is capable of covering a low-frequency band and a high-frequency band. The distance between the feeding point and one end of the slot is less than or equal to 0.1 wavelength of a central frequency of the low-frequency band.

Abstract: A radar and a method for enabling array antenna are proposed. The radar includes a transceiver, a multi-input multi-output (MIMO) array antenna, a phased array antenna, and a controller. The MIMO array antenna is coupled to the transceiver and includes first transmitting sub-arrays and receiving sub-arrays. The phased array antenna is coupled to the transceiver and includes second transmitting sub-arrays and the receiving sub-arrays. The controller is coupled to the transceiver and configured to to enable the first transmitting sub-arrays to form the MIMO array antenna or enable the second transmitting sub-arrays to form the phased array antenna.

Abstract: A communication device includes an antenna system, a metal base, and a metal elevating pillar. The antenna system at least includes a dual-polarized antenna and a reflector. The reflector is configured to reflect radiation energy from the dual-polarized antenna. The metal elevating pillar is coupled between the antenna system and the metal base, and is configured to support the antenna system.

Abstract: An electronic device has a front side and a rear side opposite to each other and includes a back cover and an antenna structure. The back cover is disposed at the rear side. The antenna structure includes a first radiation portion, a second radiation portion and a ground portion. The first radiation portion is disposed at the front side. The second radiation portion is disposed between the first radiation portion and the back cover and is connected to the first radiation portion. The ground portion is disposed between the first radiation portion and the back cover, wherein the second radiation portion is grounded to the back cover through the ground portion.

Abstract: A dish antenna is provided. The dish antenna includes a dish, a bracket, a supporter and a receiver. The bracket is connected to the dish. The supporter is connected to the bracket. The receiver is connected to the supporter and corresponding to the dish. The bracket includes a base, a first wing plate, a second wing plate and a plurality of fastening portions. The base faces the dish. The bracket is affixed to the dish through the fastening portions. The first wing plate is disposed on a first side of the base. The second wing plate is disposed on a second side of the base. The first side is opposite to the second side. The first wing plate, the second wing plate and the fastening portions are integrally formed with the base.