Abstract: In a method for selecting an antenna of an electronic device, one or more sensors are used to detect whether all of the antennas of the electronic device are approached by external objects. When all of the antennas are approached by the external objects, an approached antenna which has a largest value of received signal strength indication is selected. When not all of the antennas are approached by the external objects, an antenna which has a largest value of received signal strength indication and is not approached is selected. The selected antenna is set for transmitting and receiving wireless signals.

Abstract: A multiband antenna includes main antenna, a switch circuit, and a parasitic antenna. The main antenna includes a radiating portion, a feeding portion, a grounding portion, and an extending portion coupled to the feeding portion and the grounding portion. The radiating portion is configured to generate a low frequency resonate mode. The switch circuit is configured to regulate an impedance matching characteristic of the multiband antenna, thereby regulating an operating frequency of the low frequency resonate mode. The parasitic antenna is positioned apart from and electromagnetically coupled to the main antenna, and configured to generate a high frequency resonate mode.

Abstract: An antenna assembly includes an elastic piece, a connecting portion, a first radiating portion, and a second radiating. The connecting portion is coupled to the base board and includes a feeding point and a ground point. The first radiating portion is electrically connected to the feeding point and the elastic piece. The second radiating portion is electrically connected to the ground point and spaced from the first radiating portion. The first radiating portion, the elastic piece, and the second radiating portion are configured to operate at a first frequency band; the first radiating portion and the elastic piece generate a frequency-doubled effect to operate at a second frequency band. A wireless communication device employing the antenna assembly is also provided.

Abstract: An antenna structure includes a feed end, a ground end, a main radiator, a coupling portion, a matching circuit, a switching circuit, and a diplexer. The main radiator is coupled to the feed end. The coupling portion is coupled to the ground end and is spaced apart from the main radiator to allow current to flow from the main radiator to the coupling portion. The switching circuit is coupled to the ground end. The diplexer includes a first port, a second port, and a third port, the first port is coupled to the feed end, the second port is coupled to a transceiver via the matching circuit, and the third port is coupled to the transceiver. The diplexer separates high frequency current from low frequency current output from the feed end, the matching circuit and the switching circuit adjust the high frequency current and the low frequency current.

Abstract: A wireless communication device includes a circuit board, a metal frame, and a slot antenna. The circuit board includes a multiple bandpass filter, a plurality of matching circuits, and a plurality of Radio Frequency (RF) modules. The metal frame surrounds the circuit board. The slot antenna includes a feeding portion, at least one grounding portion, and a radiating portion. The feeding portion and the at least one grounding portion are connected between the circuit board and the metal frame, the radiating portion and the circuit board enclose a slot. The radiating portion is formed on a portion of the metal frame. The slot antenna, the multiple bandpass filter, the plurality of matching circuits, and the plurality of RF modules are electrically connected in that order.

Abstract: Antenna structure includes a feed section, a first radiator, and a second radiator. The first radiator includes a first radiation portion, a ground end, a second radiation portion, the first radiation portion is spaced from the feed end, the ground end is connected between the first radiation portion and the second radiation portion. The second radiator is located below the second radiation portion, and includes a first extending strip, a ground portion, a second extending strip, and a third extending strip. The first extending strip is spaced from the feed end, the second extending strip is connected to the first extending strip and extends along the first extending strip, and the ground portion is connected to a junction of the first extending strip, the second extending strip, and the third extending strip.

Abstract: An antenna assembly includes a feed end, a pair of ground ends, a first antenna, and a second antenna connected to the ground ends. The first antenna is connected to the feed end. The first antenna activates a high frequency band resonance mode. The second antenna is connected to the ground ends, and coupled with the first antenna to activate a low frequency band resonance mode. The feed end and the pair of ground ends are parallel to each other. The feed end and the pair of ground ends are coplanar to form a coplanar-waveguide feed structure.

Abstract: A wireless communication device includes a metallic housing and an antenna structure. The metallic housing includes a bottom frame and a side frame spaced from the bottom frame. The antenna structure includes a feed end plate, a ground end plate, a main radiator, and a coupling section. The ground end plate is coupled to the bottom frame. The main radiator is coupled between the feed end plate and the side frame. The coupling section is coupled to the main radiator and extending parallel to the bottom frame. A first end of the coupling section is coupled to a distal end of the feed end plate, and a second end of the coupling section extends towards the ground end plate, current is coupled from the feed end plate to the ground end plate via the coupling section and is coupled from the coupling section to the bottom frame.

Abstract: An antenna structure for MIMO application includes a substrate, a first antenna element, and a second antenna element. A metal ground layer covers a portion of a first surface of the substrate, and the first antenna element is arranged on the metal ground layer. The first antenna element includes an open-slot, which extending from an edge of the metal ground layer toward an inner portion of the metal ground layer, and a signal feed-in member arranged on a second surface of the substrate and spatially corresponding to an open end of the open-slot. The second antenna element is arranged on the first surface of the substrate adjacent to the first antenna element and extending away from the metal ground layer, and includes a signal feed-in portion arranged adjacent to the open end of the open-slot, and electronically connects to the signal feed-in member.

Abstract: A wearable device includes a dial extending a shaft; two watch hand elements coupled to the shaft and configured to rotate 360 degrees in a plane about the shaft; an antenna element coupled to the shaft and configured to rotate 360 degrees in the same plane about the shaft; and a matching circuit matching with the antenna element.

Abstract: An antenna structure includes a feed end plate, a ground end plate, a first radiator, a second radiator, and a metallic plate. The first radiator is coupled to the feed end plate. The second radiator is coupled to the ground end plate. The metallic plate is spaced from the first radiator and is couple the second radiator. The metallic plate includes a main sheet and at least one side sheet connected to the main sheet, a gap is defined between the main sheet and the first radiator, and the second radiator is coupled to the at least one side sheet.

Abstract: A broadband antenna for wireless communication device is disclosed. The broadband antenna includes a main radiator, a grounding unit, a feeding unit, and a resonating unit. The main radiator includes a main radiating portion, a first radiating arm extending from the main radiating portion, and a second radiating arm extending from the main radiating arm, the first radiating arm forms a first current path to generate a first high frequency mode; the second radiating arm forms a second current path to generate a second high frequency mode. The resonating unit is connected to the grounding unit, the resonating unit surrounds and is positioned separate from the second radiating arm, the resonating unit resonates with the main radiator to generate two different low frequency bands corresponding to two coupling currents.

Abstract: An antenna switching system includes a first antenna, a second antenna, a first sensing unit, a second sensing unit, a controlling unit, and a switching unit. The first sensing unit detects a distance between an object and the first antenna. The second sensing unit detects a distance between the object and the second antenna. The controlling unit is electronically connected to the first sensing unit and the second sensing unit. The switching unit is electronically connected to the controlling unit, the first antenna, and the second antenna. The controlling unit is configured to activate and deactivate the first antenna and the second antenna via the switching unit based on detections of the first sensing unit and the second sensing unit.

Abstract: A wearable wireless electronic device includes a watch dial and a hand module. The hand module includes a first hand and a second hand that are rotatably coupled to the watch dial. The first and second hands are configured to indicate current time and send/receive wireless signals. When the first and second hands rotate relative to the watch dial, the first and second hands are configured to display current time. When the first hand is positioned at a predetermined position substantially perpendicular to the second hand, the first and second hands are configured to send/receive wireless signals.

Abstract: An antenna structure includes a metal member, a radiating portion, a coupling portion, and a connecting portion. The metal member is grounded. The coupling portion is spaced apart from the radiating portion. The connecting portion has a first end electronically connected to the coupling portion and a second end electronically connected to the metal member. The radiating portion is configured to deliver current to the coupling portion.

Abstract: An antenna structure includes a feed end, a first radiator plate, a second radiator plate, a third radiator plate, a first ground end, and a second ground end. The first radiator plate and the third radiator plate are coupled to the feed end. The second radiator plate is coupled to the first radiator plate. The first ground end and the second ground end are disposed on the third radiator plate and are spaced from the first ground end. The first ring portion is coupled to the first radiator plate, the second radiator plate, and the third radiator plate.

Abstract: An antenna structure includes a baseplate, a first radiator plate, a second radiator plate, and a third radiator plate. The baseplate has a first surface and a second surface opposite to the first surface. The first radiator plate is disposed on the first surface. The second radiator plate is disposed on the first surface. The third radiator plate is disposed on the second surface. A slot is defined between the first radiator plate and the second radiator plate, and the second radiator plate is coupled to the first radiator plate and the third radiator plate.

Abstract: An antenna structure includes a feed portion, a ground portion, a connecting portion, a first metallic sheet, a second metallic sheet, and a coupling portion. The connecting portion is electrically connected to the feed portion. The first metallic sheet is electrically connected to the ground portion. The second metallic sheet is spaced apart from the first metallic sheet and is electrically connected to the connecting portion. The coupling portion is coupled to the connecting portion and spaced apart from the first metallic sheet.

Abstract: An antenna structure includes a first frame, a feed end, at least one ground end, a first radiator, a first extending section, a second extending section, a coupling section, and a second radiator. The first radiator is coupled to the feed end and is parallel to the first frame. The first extending section is coupled between the feed end and first frame. The second extending section is coupled between the feed end and the first frame. The coupling section is coupled to the first frame. The second radiator is coupled between the at least one ground end and the first frame.

Abstract: An antenna structure includes a main body, a first radiating body, and a second radiating body. The main body includes a feeding portion, a connecting portion, a first coupling portion, and a second coupling portion. The connecting portion is perpendicularly connected to the feeding portion. The first coupling portion and the second coupling portion are positioned at two opposite sides of the connecting portion. The first radiating body is configured to surround and resonate with the first coupling portion. The second radiating body is configured to surround and resonate with the second coupling portion.