Abstract: A coupled-feed multi-branch antenna system includes a dielectric substrate and a grounding portion, a first parasitic branch, a second parasitic branch, a first metal branch, a second metal branch, and a signal source on the dielectric substrate. The grounding portion is close to a first short side and disposed along a first long side. The first parasitic branch is close to a second short side, and includes at least one bend to extend along a second long side. One end of the second parasitic branch is connected to the grounding portion, and another end extends towards the first parasitic branch. One end of the first metal branch is on one side of the grounding portion, and another end extends towards the second short side. One end of the second metal branch is connected to the first metal branch, and another end is disposed along the second long side.

Abstract: A slot antenna assembly adapted to a metal case is provided in the disclosure. The slot antenna assembly includes a substrate and a metal wire. The substrate includes a first sheet plate and a second sheet plate. The first sheet plate is conductive and is provided with a slot opposite to an opening of the metal case, a size of the slot being less than or equal to a size of the opening. The second sheet plate is not conductive and is connected to the first sheet plate. The metal wire is located on a surface of the second sheet plate to be connected to a feeding signal. A vertical projection of the metal wire on the first sheet plate crosses the slot, and the metal wire and the slot together excite a low-frequency mode and a high-frequency mode.

Abstract: A slot antenna device is disposed on a metal case and includes a slot, a first dielectric substrate, a feeding metal branch, a coupling metal branch, and a signal source. The slot is in the metal case and includes a first long side, a second long side, a first short side and a second short side. The first dielectric substrate is on the metal case adjacent to the first short side of the slot and located above the slot. The feeding metal branch is on the first dielectric substrate and above the slot. A first end of the coupling metal branch is connected to the metal case of the first long side, and a second end of the coupling metal branch extends along the first long side and toward the second short side. The signal source is electrically connected to the feeding metal branch and the metal case.

Abstract: A broadband dual-antenna system provided herein comprises: a dielectric substrate including a first surface and a second surface; a grounding plane on the dielectric substrate; a loop metal branch located on the first surface and connected to the grounding plane; a coupling metal branch located on the second surface and connected to the grounding plane, the vertical projection of the coupling metal branch and that of the loop metal branch on the second surface partially overlap; a first metal branch located on the second surface and the coupling metal branch; a second metal branch located on the second surface and the coupling metal branch; a first signal source located on the second surface and connected to the first metal branch and the grounding plane; and a second signal source located on the second surface and connected to the second metal branch and the grounding plane.

Abstract: A slot antenna assembly adapted to a metal case is provided in the disclosure. The slot antenna assembly includes a substrate and a metal wire. The substrate includes a first sheet plate and a second sheet plate. The first sheet plate is conductive and is provided with a slot opposite to an opening of the metal case, a size of the slot being less than or equal to a size of the opening. The second sheet plate is not conductive and is connected to the first sheet plate. The metal wire is located on a surface of the second sheet plate to be connected to a feeding signal. A vertical projection of the metal wire on the first sheet plate crosses the slot, and the metal wire and the slot together excite a low-frequency mode and a high-frequency mode.

Abstract: A broadband dual-antenna system provided herein comprises: a dielectric substrate including a first surface and a second surface; a grounding plane on the dielectric substrate; a loop metal branch located on the first surface and connected to the grounding plane; a coupling metal branch located on the second surface and connected to the grounding plane, the vertical projection of the coupling metal branch and that of the loop metal branch on the second surface partially overlap; a first metal branch located on the second surface and the coupling metal branch; a second metal branch located on the second surface and the coupling metal branch; a first signal source located on the second surface and connected to the first metal branch and the grounding plane; and a second signal source located on the second surface and connected to the second metal branch and the grounding plane.

Abstract: A three-dimensional antenna element is provided. The three-dimensional antenna element is configured to be disposed on a surface of a conductive substrate, and includes a dielectric base, a first radiation part, a second radiation part, a third radiation part, a fourth radiation part, a first shorting element, and a second shorting element. The dielectric base includes a first plane and a second plane, where the second plane includes a first side and a second side, the first side is opposite to the second side and configured to be joined to the first plane, and the second side is configured to be joined to the surface of the conductive substrate. A signal feed-in point is coupled between the first radiation part and the second radiation part.

Abstract: A three-dimensional antenna element is provided. The three-dimensional antenna element is configured to be disposed on a surface of a conductive substrate, and includes a dielectric base, a first radiation part, a second radiation part, a third radiation part, a fourth radiation part, a first shorting element, and a second shorting element. The dielectric base includes a first plane and a second plane, where the second plane includes a first side and a second side, the first side is opposite to the second side and configured to be joined to the first plane, and the second side is configured to be joined to the surface of the conductive substrate. A signal feed-in point is coupled between the first radiation part and the second radiation part.

Abstract: A wearable electronic device includes a device body and a wearing element. The wearing element is connected to the device body. The device body includes a conductive upper cover, a conductive lower cover, an insulating frame and a circuit system. The insulating frame is disposed between the conductive upper cover and the conductive lower cover and forms an accommodating space therewith. The circuit system is disposed in the accommodating space. The conductive upper cover has a first feeding point. The conductive lower cover has a second feeding point. The circuit system is coupled to the first feeding point and the second feeding point respectively.

Abstract: A wireless communication apparatus and an antenna system therein are provided. The antenna system includes a grounding portion and an antenna body. The grounding portion includes a ground plane and a conducting element. The conducting element is perpendicular to the ground plane and is connected to the ground plane to provide a first current path. The antenna body includes a main radiating portion and a short circuit portion. The main radiating portion is parallel to the ground plane and provides a second current path. An end of the main radiating portion is electrically connected to a signal source. The short circuit portion is electrically connected between the main radiating portion and the conducting element and provides a third current path. The directions of the first current path, the second current path and the third current path are perpendicular mutually.

Abstract: A wearable electronic device includes a device body and a wearing element. The wearing element is connected to the device body. The device body includes a conductive upper cover, a conductive lower cover, an insulating frame and a circuit system. The insulating frame is disposed between the conductive upper cover and the conductive lower cover and forms an accommodating space therewith. The circuit system is disposed in the accommodating space. The conductive upper cover has a first feeding point. The conductive lower cover has a second feeding point. The circuit system is coupled to the first feeding point and the second feeding point respectively.

Abstract: A mobile communication device includes an antenna structure having a dielectric substrate and an antenna. The dielectric substrate includes a ground portion, a first non-ground portion, and a second non-ground portion. The ground portion further includes a main ground and a protruded ground electrically connected to the main ground and extending between the first non-ground portion and the second non-ground portion. The first non-ground portion and the second non-ground portion are separated by the protruded ground. One edge of the protruded ground aligns with one edge of the dielectric substrate. The antenna includes a feeding portion located in the first non-ground portion and a radiating portion extending over the protruded ground and having a first end located in the first non-ground portion and electrically connected to the main ground and a second end of the radiating portion is located in the second non-ground portion and electrically connected to the main ground.

Abstract: A communication device including a multilayer circuit board and an antenna structure therein is provided. The multilayer circuit board has at least a first plane, a second plane, and a third plane. A ground plane is disposed on one of the planes, and the ground plane is in proximity to a clearance region of the multilayer circuit board. An antenna structure is disposed in the clearance region. The antenna structure includes a first metal portion and a second metal portion. The first metal portion is coupled to a signal source through a feeding portion. The second metal portion includes at least a first line segment and a second line segment. The first line segment and the second line segment are disposed respectively on any two planes of the multilayer circuit board. The first metal line and the second metal line forms a loop structure through two conductive vias.

Abstract: A communication device includes an antenna structure, wherein the antenna structure includes a ground element and an antenna element. One edge of the ground element has a notch, and the notch is extended into the interior of the ground element to form a slot region. The slot region is substantially extended along the edge of the ground element. The antenna element includes a first radiating portion and a second radiating portion. The first radiating portion is disposed in the slot region and is excited to form at least a resonant mode in the first operating band of the antenna element. The second radiating portion is an open-slot antenna and is formed by the slot region. The second radiating portion is excited to form a resonant mode in the second operating band of the antenna element.

Abstract: A communication device including a ground element and an antenna element is provided. The antenna element is disposed adjacent to the ground element. The antenna element includes a first radiation element and a second radiation element. The first radiation element includes a first portion and a second portion. The first portion is coupled through an inductive element to the second portion. The first portion is coupled to a signal source. The second portion includes a plurality of bends such that a coupling gap is formed between an open end of the second portion and the first portion. The second radiation element has a shorted end and an open end. The shorted end of the second radiation element is coupled to the ground element. The second radiation element extends and at least partially surrounds the first radiation element.

Abstract: A wireless communication apparatus and an antenna system therein are provided. The antenna system includes a grounding portion and an antenna body. The grounding portion includes a ground plane and a conducting element. The conducting element is perpendicular to the ground plane and is connected to the ground plane to provide a first current path. The antenna body includes a main radiating portion and a short circuit portion. The main radiating portion is parallel to the ground plane and provides a second current path. An end of the main radiating portion is electrically connected to a signal source. The short circuit portion is electrically connected between the main radiating portion and the conducting element and provides a third current path. The directions of the first current path, the second current path and the third current path are perpendicular mutually.

Abstract: A mobile communication device having an antenna structure includes a grounding element and an antenna element. The grounding element includes a main ground and a protruded ground being connected to an edge of the main ground. Antenna element includes a feeding portion and a radiating portion. The feeding portion includes a feeding point, a first strip and a second strip. The first strip and the second strip are both connected to the feeding point. The radiating portion includes a first open end, a second open end and a shorting point which is connected to the protruded ground by a short-circuiting strip. There is a first coupling gap between the first strip and a first section of the radiating portion having the first open end. There is a second coupling gap between the second strip and a second section of the radiating portion having the second open end.

Abstract: A monopole slot antenna applicable to a mobile communication device includes a dielectric substrate, a first ground plane, a second ground plane, a monopole slot, and a microstrip feedline. The first ground plane is disposed on the dielectric substrate. The second ground plane is in the vicinity of the first ground plane and electrically connected to the first ground plane via a metal wire. A section of the metal wire is disposed on one surface of the dielectric substrate. The monopole slot is disposed on the first ground plane and has an open end disposed near the metal wire that connects the first and the second ground planes. The microstrip feedline is disposed on a surface of the dielectric substrate opposite to the first ground plane with one end of the microstrip feedline extended across the monopole slot and the other end connected to a signal source.

Abstract: A communication device including a multilayer circuit board and an antenna structure therein is provided. The multilayer circuit board has at least a first plane, a second plane, and a third plane. A ground plane is disposed on one of the planes, and the ground plane is in proximity to a clearance region of the multilayer circuit board. An antenna structure is disposed in the clearance region. The antenna structure includes a first metal portion and a second metal portion. The first metal portion is coupled to a signal source through a feeding portion. The second metal portion includes at least a first line segment and a second line segment. The first line segment and the second line segment are disposed respectively on any two planes of the multilayer circuit board. The first metal line and the second metal line forms a loop structure through two conductive vias.

Abstract: A communication device includes an antenna structure, wherein the antenna structure includes a ground element and an antenna element. One edge of the ground element has a notch, and the notch is extended into the interior of the ground element to form a slot region. The slot region is substantially extended along the edge of the ground element. The antenna element includes a first radiating portion and a second radiating portion. The first radiating portion is disposed in the slot region and is excited to form at least a resonant mode in the first operating band of the antenna element. The second radiating portion is an open-slot antenna and is formed by the slot region. The second radiating portion is excited to form a resonant mode in the second operating band of the antenna element.